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<meta property="og:description" content="ElementUI官网 一.树形显示-树形控件1.树形显示示例-以谷粒商城项目的商品分类为例 数据中商品分类的数据表,所有的分类数据在同一张表中 商品分类的实体类 12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626">
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2023-09-12 07:36:52">2023-09-12</time></span><span class="post-meta-categories"><span class="post-meta-separator">|</span><i class="fas fa-inbox fa-fw post-meta-icon"></i><a class="post-meta-categories" href="/categories/%E5%89%8D%E7%AB%AF/">前端</a></span></div><div class="meta-secondline"><span class="post-meta-separator">|</span><span class="post-meta-wordcount"><i class="far fa-file-word fa-fw post-meta-icon"></i><span class="post-meta-label">字数总计:</span><span class="word-count">2.6k</span><span class="post-meta-separator">|</span><i class="far fa-clock fa-fw post-meta-icon"></i><span class="post-meta-label">阅读时长:</span><span>12分钟</span></span><span class="post-meta-separator">|</span><span class="post-meta-pv-cv" id="" data-flag-title="ElementUI使用示例"><i class="far fa-eye fa-fw post-meta-icon"></i><span class="post-meta-label">阅读量:</span><span id="busuanzi_value_page_pv"><i class="fa-solid fa-spinner fa-spin"></i></span></span></div></div></div><article class="post-content" id="article-container"><p><strong><a target="_blank" rel="noopener" href="https://element.eleme.cn/#/zh-CN/component/quickstart">ElementUI官网</a></strong></p>
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<h2 id="一-树形显示-树形控件"><a href="#一-树形显示-树形控件" class="headerlink" title="一.树形显示-树形控件"></a>一.树形显示-树形控件</h2><h3 id="1-树形显示"><a href="#1-树形显示" class="headerlink" title="1.树形显示"></a>1.树形显示</h3><p><strong>示例-以谷粒商城项目的商品分类为例</strong></p>
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<p><strong>数据中商品分类的数据表,所有的分类数据在同一张表中</strong></p>
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<img src="/pictures/image-20230530174911409.png" alt="image-20230530174911409" style="zoom:150%;" />
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<p><strong>商品分类的实体类</strong></p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.atguigu.gulimall.product.entity;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> com.baomidou.mybatisplus.annotation.TableField;</span><br><span class="line"><span class="keyword">import</span> com.baomidou.mybatisplus.annotation.TableId;</span><br><span class="line"><span class="keyword">import</span> com.baomidou.mybatisplus.annotation.TableName;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.io.Serializable;</span><br><span class="line"><span class="keyword">import</span> java.util.Date;</span><br><span class="line"><span class="keyword">import</span> java.util.List;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> lombok.Data;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 商品三级分类</span></span><br><span class="line"><span class="comment"> * </span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span> JasonGong</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@email</span> JasonGong@gmail.com</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@date</span> 2023-05-19 00:23:36</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Data</span></span><br><span class="line"><span class="meta">@TableName("pms_category")</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">CategoryEntity</span> <span class="keyword">implements</span> <span class="title class_">Serializable</span> {</span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> <span class="type">long</span> <span class="variable">serialVersionUID</span> <span class="operator">=</span> <span class="number">1L</span>;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 分类id</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@TableId</span></span><br><span class="line"> <span class="keyword">private</span> Long catId;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 分类名称</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> String name;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 父分类id</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> Long parentCid;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 层级</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> Integer catLevel;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 是否显示[0-不显示，1显示]</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> Integer showStatus;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 排序</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> Integer sort;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 图标地址</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> String icon;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 计量单位</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> String productUnit;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 商品数量</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> Integer productCount;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@TableField(exist = false)</span><span class="comment">//这个注解要加，因为这个属性不是数据库中的字段</span></span><br><span class="line"> <span class="keyword">private</span> List<CategoryEntity> children;<span class="comment">//这里的属性名不是瞎起的,与ElementUI中的显示相对应,这里改了，前端也要改</span></span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p><strong>封装数据，供前端显示</strong></p>
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<p>controller层</p>
|
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 查询所有的分类以及子分类，以树形结构组装起来</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@RequestMapping("/list/tree")</span></span><br><span class="line"><span class="keyword">public</span> R <span class="title function_">list</span><span class="params">()</span>{</span><br><span class="line"> List<CategoryEntity> entities = categoryService.listWithTree();</span><br><span class="line"> <span class="keyword">return</span> R.ok().put(<span class="string">"data"</span>, entities);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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|
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<p>service层，这里主要有一个单独的递归方法，使用的时候会改就行</p>
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<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 查询所有分类，以树形结构显示</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> List<CategoryEntity> <span class="title function_">listWithTree</span><span class="params">()</span> {</span><br><span class="line"> <span class="comment">//查出所有的分类</span></span><br><span class="line"> List<CategoryEntity> entities = categoryDao.selectList(<span class="literal">null</span>);</span><br><span class="line"> <span class="comment">//组装成父子的树形结构</span></span><br><span class="line"> <span class="comment">//找到所有的一级分类</span></span><br><span class="line"> List<CategoryEntity> level1List = entities.stream().filter(categoryEntity -></span><br><span class="line"> <span class="comment">//父级分类的id等于0的就是一级分类</span></span><br><span class="line"> categoryEntity.getParentCid() == <span class="number">0</span></span><br><span class="line"> ).map((menu) -> {</span><br><span class="line"> <span class="comment">//为当前分类的子分类赋值</span></span><br><span class="line"> menu.setChildren(getChildren(menu, entities));</span><br><span class="line"> <span class="keyword">return</span> menu;</span><br><span class="line"> }).sorted((menu1, menu2) -> {</span><br><span class="line"> <span class="comment">//排序</span></span><br><span class="line"> <span class="keyword">return</span> (menu1.getSort() == <span class="literal">null</span> ? <span class="number">0</span> : menu1.getSort()) - (menu2.getSort() == <span class="literal">null</span> ? <span class="number">0</span> : menu2.getSort());</span><br><span class="line"> }).collect(Collectors.toList());</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> level1List;</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 递归查询所有菜单的子菜单</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> root 当前分类</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> all 所有的分类数据</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@return</span> 子菜单的集合</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> List<CategoryEntity> <span class="title function_">getChildren</span><span class="params">(CategoryEntity root, List<CategoryEntity> all)</span> {</span><br><span class="line"> List<CategoryEntity> children = all.stream().filter(categoryEntity -> {</span><br><span class="line"> <span class="keyword">return</span> categoryEntity.getParentCid().equals(root.getCatId());</span><br><span class="line"> }).map(categoryEntity -> {</span><br><span class="line"> <span class="comment">//1.递归找子菜单</span></span><br><span class="line"> categoryEntity.setChildren(getChildren(categoryEntity, all));</span><br><span class="line"> <span class="keyword">return</span> categoryEntity;</span><br><span class="line"> }).sorted((menu1, menu2) -> {</span><br><span class="line"> <span class="comment">//2.菜单的排序</span></span><br><span class="line"> <span class="keyword">return</span> (menu1.getSort() == <span class="literal">null</span> ? <span class="number">0</span> : menu1.getSort()) - (menu2.getSort() == <span class="literal">null</span> ? <span class="number">0</span> : menu2.getSort());</span><br><span class="line"> }).collect(Collectors.toList());</span><br><span class="line"> <span class="keyword">return</span> children;</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
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<p><strong>返回数据的格式</strong></p>
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<figure class="highlight json"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br></pre></td><td class="code"><pre><span class="line"><span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"msg"</span><span class="punctuation">:</span> <span class="string">"success"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"code"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"data"</span><span class="punctuation">:</span> <span class="punctuation">[</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"图书、音像、电子书刊"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">22</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"电子书刊"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">2</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">165</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"电子书"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">22</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">3</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span><span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span><span class="punctuation">,</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">166</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"网络原创"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">22</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">3</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span><span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span><span class="punctuation">,</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">167</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"数字杂志"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">22</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">3</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span><span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span><span class="punctuation">,</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">168</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"多媒体图书"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">22</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">3</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span><span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span></span><br><span class="line"> <span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span><span class="punctuation">,</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">23</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"音像"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">2</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">169</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"音乐"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">23</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">3</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span><span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span><span class="punctuation">,</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">170</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"影视"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">23</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">3</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span><span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span><span class="punctuation">,</span></span><br><span class="line"> <span class="punctuation">{</span></span><br><span class="line"> <span class="attr">"catId"</span><span class="punctuation">:</span> <span class="number">171</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"name"</span><span class="punctuation">:</span> <span class="string">"教育音像"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"parentCid"</span><span class="punctuation">:</span> <span class="number">23</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"catLevel"</span><span class="punctuation">:</span> <span class="number">3</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"showStatus"</span><span class="punctuation">:</span> <span class="number">1</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"icon"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productUnit"</span><span class="punctuation">:</span> <span class="literal"><span class="keyword">null</span></span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"productCount"</span><span class="punctuation">:</span> <span class="number">0</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"children"</span><span class="punctuation">:</span> <span class="punctuation">[</span><span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span></span><br><span class="line"> <span class="punctuation">]</span></span><br><span class="line"> <span class="punctuation">}</span><span class="punctuation">,</span></span><br><span class="line"> 略.............................</span><br></pre></td></tr></table></figure>
|
||
|
||
<p><strong>前端代码</strong></p>
|
||
<p>模板</p>
|
||
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><span class="line"><template></span><br><span class="line"> <div></span><br><span class="line"> <!-- 树形控件 --></span><br><span class="line"> <el-tree</span><br><span class="line"> :data="menus"</span><br><span class="line"> :props="defaultProps"</span><br><span class="line"> @node-click="handleNodeClick"</span><br><span class="line"> ></el-tree></span><br><span class="line"> </div></span><br><span class="line"></template></span><br><span class="line"></span><br><span class="line"><script></span><br><span class="line"> export default {</span><br><span class="line"> data() {</span><br><span class="line"> return {</span><br><span class="line"> data: [],//发送请求获取的数据(比如 return R.ok().put("data", entities);里面的data)</span><br><span class="line"> defaultProps: {</span><br><span class="line"> children: 'children',//实体类中的属性（比如:private List<CategoryEntity> children;)</span><br><span class="line"> label: 'label'//需要显示的属性的属性名(比如商品分类名，属性名是name,这里就填name)</span><br><span class="line"> }</span><br><span class="line"> };</span><br><span class="line"> },</span><br><span class="line"> methods: {</span><br><span class="line"> handleNodeClick(data) {</span><br><span class="line"> console.log(data);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"> };</span><br><span class="line"></script></span><br></pre></td></tr></table></figure>
|
||
|
||
<p>完整代码</p>
|
||
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br></pre></td><td class="code"><pre><span class="line"><template></span><br><span class="line"> <div></span><br><span class="line"> <!-- 树形控件 --></span><br><span class="line"> <el-tree</span><br><span class="line"> :data="menus"</span><br><span class="line"> :props="defaultProps"</span><br><span class="line"> @node-click="handleNodeClick"</span><br><span class="line"> ></el-tree></span><br><span class="line"> </div></span><br><span class="line"></template></span><br><span class="line"></span><br><span class="line"><script></span><br><span class="line">export default {</span><br><span class="line"> //定义变量</span><br><span class="line"> data() {</span><br><span class="line"> return {</span><br><span class="line"> menus: [],</span><br><span class="line"> defaultProps: {//这里的配置看官方的文档</span><br><span class="line"> children: "children",//父节点上的子节点</span><br><span class="line"> label: "name",//每个对象要显示的属性值,比如我们当前要显示商品分类中的分类名的值，这里就改成name</span><br><span class="line"> },</span><br><span class="line"> };</span><br><span class="line"> },</span><br><span class="line"> //钩子函数</span><br><span class="line"> created() {</span><br><span class="line"> //调用获取商品分类数据的方法</span><br><span class="line"> this.getMenus();</span><br><span class="line"> },</span><br><span class="line"></span><br><span class="line"> //方法</span><br><span class="line"> methods: {</span><br><span class="line"> handleNodeClick(data) {</span><br><span class="line"> console.log(data);</span><br><span class="line"> },</span><br><span class="line"> //获取所有的菜单</span><br><span class="line"> getMenus() {</span><br><span class="line"> this.$http({</span><br><span class="line"> url: this.$http.adornUrl("/product/category/list/tree"),</span><br><span class="line"> method: "get",</span><br><span class="line"> }).then(({ data }) => {</span><br><span class="line"> this.menus = data.data;</span><br><span class="line"> });</span><br><span class="line"> },</span><br><span class="line"> },</span><br><span class="line">};</span><br><span class="line"></script></span><br><span class="line"></span><br><span class="line"><style></span><br><span class="line"></style></span><br></pre></td></tr></table></figure>
|
||
|
||
<p><strong>显示效果</strong></p>
|
||
<img src="/pictures/image-20230530181102832.png" alt="image-20230530181102832" style="zoom:150%;" />
|
||
|
||
<h3 id="2-树形控件的删除、添加"><a href="#2-树形控件的删除、添加" class="headerlink" title="2.树形控件的删除、添加"></a>2.树形控件的删除、添加</h3><p>页面的显示效果</p>
|
||
<p><img src="/pictures/image-20230605145343384.png" alt="image-20230605145343384"></p>
|
||
<p>使用的组件 在树形控件的基础上添加相关的代码</p>
|
||
<img src="/pictures/image-20230605145433594.png" alt="image-20230605145433594" style="zoom:150%;" />
|
||
|
||
<p>添加的时候弹出的对话框使用的组件</p>
|
||
<img src="/pictures/image-20230605153935967.png" alt="image-20230605153935967" style="zoom:150%;" />
|
||
|
||
<img src="/pictures/image-20230605154629290.png" alt="image-20230605154629290" style="zoom:150%;" />
|
||
|
||
<p><strong>前端代码的实现</strong></p>
|
||
<p>Tips：删除成功之后依然展开删除的节点</p>
|
||
<p>删除和添加的前端代码</p>
|
||
<figure class="highlight plaintext"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br><span class="line">121</span><br><span class="line">122</span><br><span class="line">123</span><br><span class="line">124</span><br><span class="line">125</span><br><span class="line">126</span><br><span class="line">127</span><br><span class="line">128</span><br><span class="line">129</span><br><span class="line">130</span><br><span class="line">131</span><br><span class="line">132</span><br><span class="line">133</span><br><span class="line">134</span><br><span class="line">135</span><br><span class="line">136</span><br><span class="line">137</span><br><span class="line">138</span><br><span class="line">139</span><br><span class="line">140</span><br><span class="line">141</span><br><span class="line">142</span><br><span class="line">143</span><br><span class="line">144</span><br><span class="line">145</span><br><span class="line">146</span><br><span class="line">147</span><br><span class="line">148</span><br><span class="line">149</span><br><span class="line">150</span><br><span class="line">151</span><br><span class="line">152</span><br><span class="line">153</span><br><span class="line">154</span><br><span class="line">155</span><br><span class="line">156</span><br><span class="line">157</span><br><span class="line">158</span><br><span class="line">159</span><br><span class="line">160</span><br></pre></td><td class="code"><pre><span class="line"><template></span><br><span class="line"> <div></span><br><span class="line"> <!-- 树形控件--></span><br><span class="line"> <!-- :expand-on-click-node="false"设置为点击箭头的时候才会展开，避免点击删除的按钮的时候展开 --></span><br><span class="line"> <!-- show-checkbox表示开启选择框，批量选择--></span><br><span class="line"> <!-- node-key表示在整个树中唯一的表示 --></span><br><span class="line"> <el-tree</span><br><span class="line"> :data="menus"</span><br><span class="line"> :props="defaultProps"</span><br><span class="line"> :expand-on-click-node="false"</span><br><span class="line"> show-checkbox</span><br><span class="line"> node-key="catId"</span><br><span class="line"> :default-expanded-keys="expandedKey"</span><br><span class="line"> ></span><br><span class="line"> <span class="custom-tree-node" slot-scope="{ node, data }"></span><br><span class="line"> <span>{{ node.label }}</span></span><br><span class="line"> <span></span><br><span class="line"> <el-button</span><br><span class="line"> v-if="node.level <= 2"</span><br><span class="line"> type="text"</span><br><span class="line"> size="mini"</span><br><span class="line"> @click="() => append(data)"</span><br><span class="line"> ></span><br><span class="line"> 添加</span><br><span class="line"> </el-button></span><br><span class="line"> <!-- 添加判断,没有下一级节点的时候就显示删除的按钮 --></span><br><span class="line"> <el-button</span><br><span class="line"> v-if="data.children.length <= 0"</span><br><span class="line"> type="text"</span><br><span class="line"> size="mini"</span><br><span class="line"> @click="() => remove(node, data)"</span><br><span class="line"> ></span><br><span class="line"> 删除</span><br><span class="line"> </el-button></span><br><span class="line"> </span></span><br><span class="line"> </span></el-tree</span><br><span class="line"> ></span><br><span class="line"> <!-- 添加分类的时候弹出的对话框 --></span><br><span class="line"> <el-dialog title="提示" :visible.sync="dialogVisible" width="30%"></span><br><span class="line"> <el-form :model="category"></span><br><span class="line"> <el-form-item label="分类名称"></span><br><span class="line"> <el-input v-model="category.name" autocomplete="off"></el-input></span><br><span class="line"> </el-form-item></span><br><span class="line"> </el-form></span><br><span class="line"> <span slot="footer" class="dialog-footer"></span><br><span class="line"> <el-button @click="dialogVisible = false">取 消</el-button></span><br><span class="line"> <el-button type="primary" @click="addCategory">确 定</el-button></span><br><span class="line"> </span></span><br><span class="line"> </el-dialog></span><br><span class="line"> </div></span><br><span class="line"></template></span><br><span class="line"></span><br><span class="line"><script></span><br><span class="line">export default {</span><br><span class="line"> //定义变量</span><br><span class="line"> data() {</span><br><span class="line"> return {</span><br><span class="line"> menus: [],</span><br><span class="line"> defaultProps: {</span><br><span class="line"> //这里的配置看官方的文档</span><br><span class="line"> children: "children", //父节点上的子节点</span><br><span class="line"> label: "name", //每个对象要显示的属性值,比如我们当前要显示商品分类中的分类名的值，这里就改成name</span><br><span class="line"> },</span><br><span class="line"> expandedKey: [], //需要展开的数组，用于删除之后树形控件仍然展开</span><br><span class="line"> dialogVisible: false, //添加菜单的对话框的开启或者关闭</span><br><span class="line"> //表单绑定的对象</span><br><span class="line"> category: {</span><br><span class="line"> name: "", //分类的名称</span><br><span class="line"> parentCid: 0, //父类的id</span><br><span class="line"> catLevel: 0, //分类的级别</span><br><span class="line"> showStatus: 1, //是否显示该分类</span><br><span class="line"> sort: 0, //排序</span><br><span class="line"> },</span><br><span class="line"> };</span><br><span class="line"> },</span><br><span class="line"> //钩子函数</span><br><span class="line"> created() {</span><br><span class="line"> //调用获取商品分类数据的方法</span><br><span class="line"> this.getMenus();</span><br><span class="line"> },</span><br><span class="line"></span><br><span class="line"> //方法</span><br><span class="line"> methods: {</span><br><span class="line"> //添加分类(弹出的对话框确定按钮执行的方法)</span><br><span class="line"> addCategory() {</span><br><span class="line"> console.log("提交的数据:", this.category);</span><br><span class="line"> //将添加的数据返回给后端</span><br><span class="line"> this.$http({</span><br><span class="line"> url: this.$http.adornUrl("/product/category/save"),</span><br><span class="line"> method: "post",</span><br><span class="line"> data: this.$http.adornData(this.category, false),</span><br><span class="line"> }).then(({ data }) => {</span><br><span class="line"> this.$message({</span><br><span class="line"> message: "菜单添加成功",</span><br><span class="line"> type: "success",</span><br><span class="line"> });</span><br><span class="line"> //刷新一下页面</span><br><span class="line"> this.getMenus()</span><br><span class="line"> //设置需要默认展开的菜单(依然展开刚才添加的节点)</span><br><span class="line"> this.expandedKey = [this.category.parentCid];</span><br><span class="line"> });</span><br><span class="line"> //关闭对话框</span><br><span class="line"> this.dialogVisible = false;</span><br><span class="line"> },</span><br><span class="line"> //添加分类的方法</span><br><span class="line"> append(data) {</span><br><span class="line"> //清空一下表单的数据</span><br><span class="line"> this.category.name = "";</span><br><span class="line"> //打开添加的对话框</span><br><span class="line"> this.dialogVisible = true;</span><br><span class="line"> //为分类的对象赋值</span><br><span class="line"> this.category.parentCid = data.catId;</span><br><span class="line"> this.category.catLevel = data.catLevel * 1 + 1; //防止catLevel是一个字符串</span><br><span class="line"> },</span><br><span class="line"> //删除节点的方法</span><br><span class="line"> remove(node, data) {</span><br><span class="line"> var ids = [data.catId];</span><br><span class="line"> this.$confirm(`是否要删除[${data.name}]菜单?`, "提示", {</span><br><span class="line"> confirmButtonText: "确定",</span><br><span class="line"> cancelButtonText: "取消",</span><br><span class="line"> type: "warning",</span><br><span class="line"> })</span><br><span class="line"> .then(() => {</span><br><span class="line"> this.$http({</span><br><span class="line"> url: this.$http.adornUrl("/product/category/delete"),</span><br><span class="line"> method: "post",</span><br><span class="line"> data: this.$http.adornData(ids, false),</span><br><span class="line"> }).then(({ data }) => {</span><br><span class="line"> this.$message({</span><br><span class="line"> message: "菜单删除成功",</span><br><span class="line"> type: "success",</span><br><span class="line"> });</span><br><span class="line"> //刷新一下页面</span><br><span class="line"> this.getMenus();</span><br><span class="line"> //设置需要默认展开的菜单(依然展开刚才删除的节点)</span><br><span class="line"> this.expandedKey = [node.parent.data.catId];</span><br><span class="line"> });</span><br><span class="line"> })</span><br><span class="line"> .catch(() => {</span><br><span class="line"> this.$message({</span><br><span class="line"> type: "info",</span><br><span class="line"> message: "已取消删除",</span><br><span class="line"> });</span><br><span class="line"> });</span><br><span class="line"> },</span><br><span class="line"> //获取所有的菜单</span><br><span class="line"> getMenus() {</span><br><span class="line"> this.$http({</span><br><span class="line"> url: this.$http.adornUrl("/product/category/list/tree"),</span><br><span class="line"> method: "get",</span><br><span class="line"> }).then(({ data }) => {</span><br><span class="line"> this.menus = data.data;</span><br><span class="line"> });</span><br><span class="line"> },</span><br><span class="line"> },</span><br><span class="line">};</span><br><span class="line"></script></span><br><span class="line"></span><br><span class="line"><style></span><br><span class="line"></style></span><br></pre></td></tr></table></figure>
|
||
|
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<p><strong>后端代码</strong></p>
|
||
<p>删除的后端代码</p>
|
||
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 删除</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@RequestMapping("/delete")</span></span><br><span class="line"> <span class="comment">//@RequiresPermissions("product:category:delete")</span></span><br><span class="line"> <span class="keyword">public</span> R <span class="title function_">delete</span><span class="params">(<span class="meta">@RequestBody</span> Long[] catIds)</span> {</span><br><span class="line"> <span class="comment">//检查当前删除的菜单，是否被别的地方引用</span></span><br><span class="line"> <span class="comment">//categoryService.removeByIds(Arrays.asList(catIds));</span></span><br><span class="line"> categoryService.removeMenuByIds(Arrays.asList(catIds));</span><br><span class="line"> <span class="keyword">return</span> R.ok();</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
|
||
|
||
<p>添加的后端代码</p>
|
||
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 保存</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@RequestMapping("/save")</span></span><br><span class="line"><span class="comment">//@RequiresPermissions("product:category:save")</span></span><br><span class="line"><span class="keyword">public</span> R <span class="title function_">save</span><span class="params">(<span class="meta">@RequestBody</span> CategoryEntity category)</span> {</span><br><span class="line"> categoryService.save(category);</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> R.ok();</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
|
||
|
||
<p>实现的效果</p>
|
||
<p><img src="/pictures/image-20230605163004850.png" alt="image-20230605163004850"></p>
|
||
</article><div class="tag_share"><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/%E5%89%8D%E7%AB%AF/">前端</a></div><div class="post_share"><div class="social-share" data-image="/img/2.png" data-sites="wechat,weibo,qq"></div><link rel="stylesheet" href="/cdn/css/share.min.css" media="print" onload="this.media='all'"><script src="/cdn/js/social-share.min.js" defer></script></div></div><div class="post-reward"><div class="reward-button"><i class="fas fa-qrcode"></i> 打赏</div><div class="reward-main"><ul class="reward-all"><li class="reward-item"><a href="/img/wechat.jpg" target="_blank"><img class="post-qr-code-img" src="/img/wechat.jpg" alt="微信"/></a><div class="post-qr-code-desc">微信</div></li><li class="reward-item"><a href="/img/alipay.jpg" target="_blank"><img class="post-qr-code-img" src="/img/alipay.jpg" alt="支付宝"/></a><div class="post-qr-code-desc">支付宝</div></li></ul></div></div><br/><div id="post-comment"><div class="comment-head"><div 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is-expand"><ol class="toc"><li class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%80-%E6%A0%91%E5%BD%A2%E6%98%BE%E7%A4%BA-%E6%A0%91%E5%BD%A2%E6%8E%A7%E4%BB%B6"><span class="toc-text">一.树形显示-树形控件</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#1-%E6%A0%91%E5%BD%A2%E6%98%BE%E7%A4%BA"><span class="toc-text">1.树形显示</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#2-%E6%A0%91%E5%BD%A2%E6%8E%A7%E4%BB%B6%E7%9A%84%E5%88%A0%E9%99%A4%E3%80%81%E6%B7%BB%E5%8A%A0"><span class="toc-text">2.树形控件的删除、添加</span></a></li></ol></li></ol></div></div><div class="card-widget card-recent-post"><div class="item-headline"><i class="fas fa-history"></i><span>最近更新</span></div><div class="aside-list"><div class="aside-list-item"><a class="thumbnail" href="/posts/24183.html" title="任务进度"><img src="/img/5.png" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="任务进度"/></a><div class="content"><a class="title" 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