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<meta property="og:description" content=" 在前端接收数据和前端向后端传递数据的时候，都需要进行数据校验，避免传入错误的信息，比如在需要传入一个非空的值时，传入了一个空字符串，需要传入邮箱号码的时候，传入的非邮箱格式的数据。同时在写接口时经常要写效验请求参数逻辑，这时候我们会常用做法是写大量的 if 与 if else 类似这样的代码，大量if-else代码看起来比较混乱，降低了代码的可读性。 一.JSR303数据校验1.引入依赖12">
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<h2 id="一-JSR303数据校验"><a href="#一-JSR303数据校验" class="headerlink" title="一.JSR303数据校验"></a>一.JSR303数据校验</h2><h3 id="1-引入依赖"><a href="#1-引入依赖" class="headerlink" title="1.引入依赖"></a>1.引入依赖</h3><figure class="highlight xml"><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></pre></td><td class="code"><pre><span class="line"><span class="tag"><<span class="name">dependency</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">groupId</span>></span>org.hibernate<span class="tag"></<span class="name">groupId</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">artifactId</span>></span>hibernate-validator<span class="tag"></<span class="name">artifactId</span>></span></span><br><span class="line"> <span class="tag"><<span class="name">version</span>></span>6.0.7.Final<span class="tag"></<span class="name">version</span>></span></span><br><span class="line"><span class="tag"></<span class="name">dependency</span>></span></span><br></pre></td></tr></table></figure>
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<h3 id="2-给实体类添加校验注解，并定义自己的message提示"><a href="#2-给实体类添加校验注解，并定义自己的message提示" class="headerlink" title="2.给实体类添加校验注解，并定义自己的message提示"></a>2.给实体类添加校验注解，并定义自己的message提示</h3><p><strong>常用的检验注解</strong></p>
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<img src="/pictures/image-20230612170704286.png" alt="image-20230612170704286" style="zoom:150%;" />
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<p><strong>示例</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></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.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><br><span class="line"><span class="keyword">import</span> lombok.Data;</span><br><span class="line"><span class="keyword">import</span> org.hibernate.validator.constraints.URL;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.validation.constraints.Min;</span><br><span class="line"><span class="keyword">import</span> javax.validation.constraints.NotBlank;</span><br><span class="line"><span class="keyword">import</span> javax.validation.constraints.NotEmpty;</span><br><span class="line"><span class="keyword">import</span> javax.validation.constraints.Pattern;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 品牌</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_brand")</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">BrandEntity</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"> * 品牌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 brandId;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 品牌名</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@NotBlank(message = "品牌名必须提交")</span> <span class="comment">//非空的校验</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"> * 品牌logo地址</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@NotEmpty</span><span class="comment">//既不能为空，也要符合URL的格式</span></span><br><span class="line"> <span class="meta">@URL(message = "logo必须是一个合法的URL地址")</span><span class="comment">//URL的校验</span></span><br><span class="line"> <span class="keyword">private</span> String logo;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 介绍</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> String descript;</span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 显示状态[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"> * 检索首字母</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@NotEmpty</span></span><br><span class="line"> <span class="meta">@Pattern(regexp = "^[a-zA-Z]$", message = "检索首字母必须是一个字母")</span><span class="comment">//正则表达式的校验,在java中使用正则的时候不需要/符号</span></span><br><span class="line"> <span class="keyword">private</span> String firstLetter;</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="meta">@NotNull</span> <span class="comment">//Integer类型不为空，使用@NotNull不能使用@NotEmpty</span></span><br><span class="line"> <span class="meta">@Min(value = 0, message = "排序必须大于等于0")</span><span class="comment">//最小值是0</span></span><br><span class="line"> <span class="keyword">private</span> Integer sort;</span><br><span class="line"></span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<h3 id="3-开启校验功能-Valid"><a href="#3-开启校验功能-Valid" class="headerlink" title="3.开启校验功能@Valid"></a>3.开启校验功能@Valid</h3><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></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 class="doctag">@Valid</span>注解开启校验</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> result 检验之后响应的结果信息</span></span><br><span class="line"><span class="comment"> * 给校验的bean后紧跟一个BindingResult，就可以获取到校验的结果</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="keyword">public</span> R <span class="title function_">save</span><span class="params">(<span class="meta">@Valid</span> <span class="meta">@RequestBody</span> BrandEntity brand, BindingResult result<span class="comment">/*紧跟在需要校验的字段后面*/</span>)</span>{</span><br><span class="line"> <span class="keyword">if</span>(result.hasErrors()){<span class="comment">//判断有没有校验的错误</span></span><br><span class="line"> Map<String,String> map = <span class="keyword">new</span> <span class="title class_">HashMap</span><>();</span><br><span class="line"> <span class="comment">//获取检验的错误结果, result.getFieldErrors()：校验出错的字段的集合</span></span><br><span class="line"> <span class="keyword">for</span> (FieldError fieldError : result.getFieldErrors()) {</span><br><span class="line"> <span class="type">String</span> <span class="variable">defaultMessage</span> <span class="operator">=</span> fieldError.getDefaultMessage();<span class="comment">//获取到错误的提示</span></span><br><span class="line"> <span class="type">String</span> <span class="variable">field</span> <span class="operator">=</span> fieldError.getField();<span class="comment">//获取错误的属性（字段）的名字</span></span><br><span class="line"> <span class="comment">//封装在一个集合中方便后期统一通过R返回结果</span></span><br><span class="line"> map.put(field,defaultMessage);</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> R.error(<span class="number">400</span>,<span class="string">"提交的数据不合法"</span>).put(<span class="string">"data"</span>,map);</span><br><span class="line"> }<span class="keyword">else</span> {</span><br><span class="line"> <span class="comment">//校验合格的话，就做进行业务的处理</span></span><br><span class="line"> brandService.save(brand);</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>
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<p>测试查看返回的数据的格式,这里我们输入的都是不合法的数据格式，返回的结果如下</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></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">"提交的数据不合法"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"code"</span><span class="punctuation">:</span> <span class="number">400</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="attr">"name"</span><span class="punctuation">:</span> <span class="string">"品牌名必须提交"</span><span class="punctuation">,</span><span class="comment">//字段:错误信息</span></span><br><span class="line"> <span class="attr">"logo"</span><span class="punctuation">:</span> <span class="string">"logo必须是一个合法的URL地址"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"sort"</span><span class="punctuation">:</span> <span class="string">"排序必须大于等于0"</span><span class="punctuation">,</span></span><br><span class="line"> <span class="attr">"firstLetter"</span><span class="punctuation">:</span> <span class="string">"检索首字母必须是一个字母"</span></span><br><span class="line"> <span class="punctuation">}</span></span><br><span class="line"><span class="punctuation">}</span></span><br></pre></td></tr></table></figure>
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<p>参数没有错误之后返回的数据</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></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><br><span class="line"><span class="punctuation">}</span></span><br></pre></td></tr></table></figure>
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|
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<h3 id="4-上面的代码过于冗余-我们可以直接使用统一异常处理处理数据校验的异常"><a href="#4-上面的代码过于冗余-我们可以直接使用统一异常处理处理数据校验的异常" class="headerlink" title="4.上面的代码过于冗余,我们可以直接使用统一异常处理处理数据校验的异常"></a>4.上面的代码过于冗余,我们可以直接使用统一异常处理处理数据校验的异常</h3><p>在统一异常处理类上加上数据校验异常的异常处理</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></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.atguigu.gulimall.product.exception;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> com.atguigu.common.utils.R;</span><br><span class="line"><span class="keyword">import</span> lombok.extern.slf4j.Slf4j;</span><br><span class="line"><span class="keyword">import</span> org.springframework.validation.BindingResult;</span><br><span class="line"><span class="keyword">import</span> org.springframework.validation.FieldError;</span><br><span class="line"><span class="keyword">import</span> org.springframework.web.bind.MethodArgumentNotValidException;</span><br><span class="line"><span class="keyword">import</span> org.springframework.web.bind.annotation.ExceptionHandler;</span><br><span class="line"><span class="keyword">import</span> org.springframework.web.bind.annotation.RestControllerAdvice;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.util.HashMap;</span><br><span class="line"><span class="keyword">import</span> java.util.Map;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span> Jason Gong</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span> 1.0</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Date</span> 2023/6/12</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span> 异常处理类</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Slf4j</span></span><br><span class="line"><span class="meta">@RestControllerAdvice(basePackages = "com.atguigu.gulimall.product.controller")</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">GulimallExceptionControllerAdvice</span> {</span><br><span class="line"></span><br><span class="line"> <span class="meta">@ExceptionHandler(value = MethodArgumentNotValidException.class)</span></span><br><span class="line"> <span class="keyword">public</span> R <span class="title function_">handleValidException</span><span class="params">(MethodArgumentNotValidException e)</span>{</span><br><span class="line"> log.error(<span class="string">"数据校验出现问题:{},异常类型:{}"</span>,e.getMessage(),e.getClass());</span><br><span class="line"> Map<String,String> map = <span class="keyword">new</span> <span class="title class_">HashMap</span><>();</span><br><span class="line"> <span class="comment">//获取检验的错误结果</span></span><br><span class="line"> <span class="type">BindingResult</span> <span class="variable">result</span> <span class="operator">=</span> e.getBindingResult();</span><br><span class="line"> <span class="keyword">for</span> (FieldError fieldError : result.getFieldErrors()) {</span><br><span class="line"> <span class="comment">//获取到错误的提示</span></span><br><span class="line"> <span class="type">String</span> <span class="variable">defaultMessage</span> <span class="operator">=</span> fieldError.getDefaultMessage();</span><br><span class="line"> <span class="comment">//获取错误的属性的名字</span></span><br><span class="line"> <span class="type">String</span> <span class="variable">field</span> <span class="operator">=</span> fieldError.getField();</span><br><span class="line"> map.put(field,defaultMessage);</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> R.error(<span class="number">400</span>,<span class="string">"数据校验出现问题"</span>).put(<span class="string">"data"</span>,map);</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>这个时候上面的代码就可以简化为下面的格式，数据校验出现问题之后就直接在统一异常处理中处理了</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></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="keyword">public</span> R <span class="title function_">save</span><span class="params">(<span class="meta">@Valid</span> <span class="meta">@RequestBody</span> BrandEntity brand )</span>{</span><br><span class="line"> brandService.save(brand);</span><br><span class="line"> <span class="keyword">return</span> R.ok();</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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|
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<h3 id="5-分组校验功能"><a href="#5-分组校验功能" class="headerlink" title="5.分组校验功能"></a>5.分组校验功能</h3><pre><code> 例如:当我们在添加一个品牌的时候，我们不需要传入这个品牌的id信息，需要这个品牌的品牌名信息，但是在修改这个品牌的时候，我们需要这个品牌的id信息和品牌名的信息，这时我们就需要使用分组校验了
|
||
</code></pre>
|
||
<h4 id="5-1-定义空接口-作为分组校验的组"><a href="#5-1-定义空接口-作为分组校验的组" class="headerlink" title="5.1 定义空接口,作为分组校验的组"></a>5.1 定义空接口,作为分组校验的组</h4><p>添加操作的组</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></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.atguigu.common.valid;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">interface</span> <span class="title class_">AddGroup</span> {</span><br><span class="line">}</span><br><span class="line"></span><br></pre></td></tr></table></figure>
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|
||
<p>修改操作的组</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></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.atguigu.common.valid;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">interface</span> <span class="title class_">UpdateGroup</span> {</span><br><span class="line">}</span><br><span class="line"></span><br></pre></td></tr></table></figure>
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|
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<h4 id="5-2-在实体类上添加上分组的信息"><a href="#5-2-在实体类上添加上分组的信息" class="headerlink" title="5.2 在实体类上添加上分组的信息"></a>5.2 在实体类上添加上分组的信息</h4><p><strong>注意:使用了分组校验之后,其余的字段也要加上分组信息，否则没有加上分组信息的会失效</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></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.atguigu.common.valid.AddGroup;</span><br><span class="line"><span class="keyword">import</span> com.atguigu.common.valid.UpdateGroup;</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><br><span class="line"><span class="keyword">import</span> lombok.Data;</span><br><span class="line"><span class="keyword">import</span> org.hibernate.validator.constraints.URL;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.validation.constraints.*;</span><br><span class="line"></span><br><span class="line"><span class="meta">@Data</span></span><br><span class="line"><span class="meta">@TableName("pms_brand")</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">BrandEntity</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"> * 品牌id</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@NotNull(message = "修改必须指定品牌id", groups = {UpdateGroup.class})</span><span class="comment">//在修改的时候进行校验</span></span><br><span class="line"> <span class="meta">@Null(message = "新增不能指定id", groups = {AddGroup.class})</span><span class="comment">//在添加的时候进行校验</span></span><br><span class="line"> <span class="meta">@TableId</span></span><br><span class="line"> <span class="keyword">private</span> Long brandId;</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"> * 品牌名</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@NotBlank(message = "品牌名必须提交", groups = {AddGroup.class, UpdateGroup.class})</span><span class="comment">//这个就是在添加和修改的组中都需要进行校验</span></span><br><span class="line"> <span class="keyword">private</span> String name;</span><br><span class="line">}</span><br><span class="line"></span><br></pre></td></tr></table></figure>
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<h4 id="5-3-在控制层添加上相应的注解信息-指定当前是操作属于的分组"><a href="#5-3-在控制层添加上相应的注解信息-指定当前是操作属于的分组" class="headerlink" title="5.3 在控制层添加上相应的注解信息,指定当前是操作属于的分组"></a>5.3 在控制层添加上相应的注解信息,指定当前是操作属于的分组</h4><p><strong>注意:这里如果产生数据校验的出现问题的异常，会由统一异常处理进行处理</strong></p>
|
||
<p>保存的控制器方法上添加上添加分组信息</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></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 class="doctag">@Validated</span>({AddGroup.class}) 指定使用添加分组的校验</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="keyword">public</span> R <span class="title function_">save</span><span class="params">(<span class="meta">@Validated({AddGroup.class})</span> <span class="meta">@RequestBody</span> BrandEntity brand )</span>{</span><br><span class="line"> brandService.save(brand);</span><br><span class="line"> <span class="keyword">return</span> R.ok();</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<p>修改的分组上添加上修改的分组信息</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></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 修改</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@RequestMapping("/update")</span></span><br><span class="line"><span class="keyword">public</span> R <span class="title function_">update</span><span class="params">(<span class="meta">@Validated({UpdateGroup.class})</span> <span class="meta">@RequestBody</span> BrandEntity brand)</span>{</span><br><span class="line"> brandService.updateById(brand);</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>测试:我们在新增的时候加上品牌的id，这时就会产生错误</p>
|
||
<p><img src="/pictures/image-20230614105450858.png" alt="image-20230614105450858"></p>
|
||
<p>修改的时候不带品牌的id信息</p>
|
||
<p><img src="/pictures/image-20230614111024292.png" alt="image-20230614111024292"></p>
|
||
<h3 id="6-自定义校验"><a href="#6-自定义校验" class="headerlink" title="6.自定义校验"></a>6.自定义校验</h3><p><strong>这里我们以编写一个输入的值只能是指定值的注解为例</strong></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></pre></td><td class="code"><pre><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 显示状态[0-不显示；1-显示]</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="comment">//注意:我们使用了分组校验，所以这里也要加上分组groups</span></span><br><span class="line"><span class="meta">@ListValue(vals = {0, 1}, groups = {AddGroup.class, UpdateGroup.class})</span><span class="comment">//自定义的注解，输入的时候只能是0或者1</span></span><br><span class="line"><span class="keyword">private</span> Integer showStatus;</span><br></pre></td></tr></table></figure>
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||
|
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<h4 id="6-1-编写一个自定义的校验注解"><a href="#6-1-编写一个自定义的校验注解" class="headerlink" title="6.1 编写一个自定义的校验注解"></a>6.1 编写一个自定义的校验注解</h4><p>编写自定义注解</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></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.atguigu.common.valid;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.validation.Constraint;</span><br><span class="line"><span class="keyword">import</span> javax.validation.Payload;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.lang.annotation.Documented;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> java.lang.annotation.Retention;</span><br><span class="line"><span class="keyword">import</span> java.lang.annotation.Target;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> <span class="keyword">static</span> java.lang.annotation.ElementType.*;</span><br><span class="line"><span class="keyword">import</span> <span class="keyword">static</span> java.lang.annotation.ElementType.TYPE_USE;</span><br><span class="line"><span class="keyword">import</span> <span class="keyword">static</span> java.lang.annotation.RetentionPolicy.RUNTIME;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span> Jason Gong</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span> 1.0</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Date</span> 2023/6/15</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span> 自定义的校验注解</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="meta">@Documented</span></span><br><span class="line"><span class="meta">@Constraint(validatedBy = {})</span><span class="comment">//校验注解使用的校验器</span></span><br><span class="line"><span class="meta">@Target({METHOD, FIELD, ANNOTATION_TYPE, CONSTRUCTOR, PARAMETER, TYPE_USE})</span><span class="comment">//注解可以标注的位置</span></span><br><span class="line"><span class="meta">@Retention(RUNTIME)</span></span><br><span class="line"><span class="keyword">public</span> <span class="meta">@interface</span> ListValue {</span><br><span class="line"></span><br><span class="line"> String <span class="title function_">message</span><span class="params">()</span> <span class="keyword">default</span> <span class="string">"{com.atguigu.common.valid.ListValue.message}"</span>;<span class="comment">//在配置文件中指明</span></span><br><span class="line"></span><br><span class="line"> Class<?>[] groups() <span class="keyword">default</span> {};</span><br><span class="line"></span><br><span class="line"> Class<? <span class="keyword">extends</span> <span class="title class_">Payload</span>>[] payload() <span class="keyword">default</span> {};</span><br><span class="line"></span><br><span class="line"> <span class="type">int</span>[] vals() <span class="keyword">default</span> {};<span class="comment">//使用注解的时候会有vals属性 在属性里面指定值</span></span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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||
|
||
<p>编写注解中默认提示消息的配置文件</p>
|
||
<p><strong>ValidationMessages.properties</strong></p>
|
||
<figure class="highlight properties"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="attr">com.atguigu.common.valid.ListValue.message</span>=<span class="string">必须提交指定的值</span></span><br></pre></td></tr></table></figure>
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||
|
||
<h4 id="6-2-编写一个自定义的校验器"><a href="#6-2-编写一个自定义的校验器" class="headerlink" title="6.2 编写一个自定义的校验器"></a>6.2 编写一个自定义的校验器</h4><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></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> com.atguigu.common.valid;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.validation.ConstraintValidator;</span><br><span class="line"><span class="keyword">import</span> javax.validation.ConstraintValidatorContext;</span><br><span class="line"><span class="keyword">import</span> java.util.HashSet;</span><br><span class="line"><span class="keyword">import</span> java.util.Set;</span><br><span class="line"></span><br><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@author</span> Jason Gong</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@version</span> 1.0</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Date</span> 2023/6/15</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@Description</span> 自定义的校验器</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">ListValueConstraintValidator</span> <span class="keyword">implements</span> <span class="title class_">ConstraintValidator</span><ListValue,Integer> {</span><br><span class="line"> <span class="keyword">private</span> Set<Integer> set = <span class="keyword">new</span> <span class="title class_">HashSet</span><>();<span class="comment">//创建一个set集合 用于存储指定输入的值0和1</span></span><br><span class="line"> <span class="comment">//初始化方法</span></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">initialize</span><span class="params">(ListValue constraintAnnotation)</span> {</span><br><span class="line"> <span class="type">int</span>[] vals = constraintAnnotation.vals();<span class="comment">//@ListValue(vals = {0, 1})</span></span><br><span class="line"> <span class="keyword">for</span> (<span class="type">int</span> val : vals) {</span><br><span class="line"> set.add(val);</span><br><span class="line"> }</span><br><span class="line"> }</span><br><span class="line"></span><br><span class="line"> <span class="comment">//判断是否校验成功</span></span><br><span class="line"> <span class="comment">//value:需要校验的值</span></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> <span class="type">boolean</span> <span class="title function_">isValid</span><span class="params">(Integer integer, ConstraintValidatorContext constraintValidatorContext)</span> {</span><br><span class="line"> <span class="keyword">return</span> set.contains(integer);<span class="comment">//判断真实树的值在不在包含0和1的这个set集合中</span></span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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<h4 id="6-3-关联自定义的校验器和校验注解"><a href="#6-3-关联自定义的校验器和校验注解" class="headerlink" title="6.3 关联自定义的校验器和校验注解"></a>6.3 关联自定义的校验器和校验注解</h4><p>在自定义的注解上面关联上上面自定义的校验规则</p>
|
||
<p><img src="/pictures/image-20230615151144311.png" alt="image-20230615151144311"></p>
|
||
<p>测试自定义的注解</p>
|
||
<p><img src="/pictures/image-20230615152331597.png" alt="image-20230615152331597"></p>
|
||
</article><div class="tag_share"><div class="post-meta__tag-list"><a class="post-meta__tags" href="/tags/Java/">Java</a></div><div class="post_share"><div class="social-share" data-image="/img/4.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 class="comment-headline"><i class="far fa-comment-alt fa-fw"></i><span> 评论</span></div></div><div class="comment-wrap"><div><div id="gitalk-container"></div></div></div></div></div><div class="aside-content" id="aside-content"><div class="card-widget card-info"><div class="is-center"><div class="avatar-img"><img src="/img/avatar.jpg" onerror="this.onerror=null;this.src='/img/loading.gif'" alt="avatar"/></div><div class="author-info__name">Jason</div><div class="author-info__description">Debug the World！</div></div><div class="card-info-data site-data is-center"><a href="/archives/"><div class="headline">文章</div><div class="length-num">60</div></a><a href="/tags/"><div class="headline">标签</div><div class="length-num">39</div></a><a href="/categories/"><div class="headline">分类</div><div class="length-num">10</div></a></div><a id="card-info-btn"><i class="fab fa-microsoft"></i><span>Ctrl + D 收藏</span></a><div class="card-info-social-icons is-center"><a class="social-icon" href="https://github.com/JasonsGong" 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class="toc-item toc-level-2"><a class="toc-link" href="#%E4%B8%80-JSR303%E6%95%B0%E6%8D%AE%E6%A0%A1%E9%AA%8C"><span class="toc-text">一.JSR303数据校验</span></a><ol class="toc-child"><li class="toc-item toc-level-3"><a class="toc-link" href="#1-%E5%BC%95%E5%85%A5%E4%BE%9D%E8%B5%96"><span class="toc-text">1.引入依赖</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#2-%E7%BB%99%E5%AE%9E%E4%BD%93%E7%B1%BB%E6%B7%BB%E5%8A%A0%E6%A0%A1%E9%AA%8C%E6%B3%A8%E8%A7%A3%EF%BC%8C%E5%B9%B6%E5%AE%9A%E4%B9%89%E8%87%AA%E5%B7%B1%E7%9A%84message%E6%8F%90%E7%A4%BA"><span class="toc-text">2.给实体类添加校验注解，并定义自己的message提示</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#3-%E5%BC%80%E5%90%AF%E6%A0%A1%E9%AA%8C%E5%8A%9F%E8%83%BD-Valid"><span class="toc-text">3.开启校验功能@Valid</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#4-%E4%B8%8A%E9%9D%A2%E7%9A%84%E4%BB%A3%E7%A0%81%E8%BF%87%E4%BA%8E%E5%86%97%E4%BD%99-%E6%88%91%E4%BB%AC%E5%8F%AF%E4%BB%A5%E7%9B%B4%E6%8E%A5%E4%BD%BF%E7%94%A8%E7%BB%9F%E4%B8%80%E5%BC%82%E5%B8%B8%E5%A4%84%E7%90%86%E5%A4%84%E7%90%86%E6%95%B0%E6%8D%AE%E6%A0%A1%E9%AA%8C%E7%9A%84%E5%BC%82%E5%B8%B8"><span class="toc-text">4.上面的代码过于冗余,我们可以直接使用统一异常处理处理数据校验的异常</span></a></li><li class="toc-item toc-level-3"><a class="toc-link" href="#5-%E5%88%86%E7%BB%84%E6%A0%A1%E9%AA%8C%E5%8A%9F%E8%83%BD"><span class="toc-text">5.分组校验功能</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#5-1-%E5%AE%9A%E4%B9%89%E7%A9%BA%E6%8E%A5%E5%8F%A3-%E4%BD%9C%E4%B8%BA%E5%88%86%E7%BB%84%E6%A0%A1%E9%AA%8C%E7%9A%84%E7%BB%84"><span class="toc-text">5.1 定义空接口,作为分组校验的组</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#5-2-%E5%9C%A8%E5%AE%9E%E4%BD%93%E7%B1%BB%E4%B8%8A%E6%B7%BB%E5%8A%A0%E4%B8%8A%E5%88%86%E7%BB%84%E7%9A%84%E4%BF%A1%E6%81%AF"><span class="toc-text">5.2 在实体类上添加上分组的信息</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#5-3-%E5%9C%A8%E6%8E%A7%E5%88%B6%E5%B1%82%E6%B7%BB%E5%8A%A0%E4%B8%8A%E7%9B%B8%E5%BA%94%E7%9A%84%E6%B3%A8%E8%A7%A3%E4%BF%A1%E6%81%AF-%E6%8C%87%E5%AE%9A%E5%BD%93%E5%89%8D%E6%98%AF%E6%93%8D%E4%BD%9C%E5%B1%9E%E4%BA%8E%E7%9A%84%E5%88%86%E7%BB%84"><span class="toc-text">5.3 在控制层添加上相应的注解信息,指定当前是操作属于的分组</span></a></li></ol></li><li class="toc-item toc-level-3"><a class="toc-link" href="#6-%E8%87%AA%E5%AE%9A%E4%B9%89%E6%A0%A1%E9%AA%8C"><span class="toc-text">6.自定义校验</span></a><ol class="toc-child"><li class="toc-item toc-level-4"><a class="toc-link" href="#6-1-%E7%BC%96%E5%86%99%E4%B8%80%E4%B8%AA%E8%87%AA%E5%AE%9A%E4%B9%89%E7%9A%84%E6%A0%A1%E9%AA%8C%E6%B3%A8%E8%A7%A3"><span class="toc-text">6.1 编写一个自定义的校验注解</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#6-2-%E7%BC%96%E5%86%99%E4%B8%80%E4%B8%AA%E8%87%AA%E5%AE%9A%E4%B9%89%E7%9A%84%E6%A0%A1%E9%AA%8C%E5%99%A8"><span class="toc-text">6.2 编写一个自定义的校验器</span></a></li><li class="toc-item toc-level-4"><a class="toc-link" href="#6-3-%E5%85%B3%E8%81%94%E8%87%AA%E5%AE%9A%E4%B9%89%E7%9A%84%E6%A0%A1%E9%AA%8C%E5%99%A8%E5%92%8C%E6%A0%A1%E9%AA%8C%E6%B3%A8%E8%A7%A3"><span class="toc-text">6.3 关联自定义的校验器和校验注解</span></a></li></ol></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/8957.html" title="Linux从入门到进阶"><img src="/img/8.png" onerror="this.onerror=null;this.src='/img/404.jpg'" alt="Linux从入门到进阶"/></a><div class="content"><a class="title" href="/posts/8957.html" title="Linux从入门到进阶">Linux从入门到进阶</a><time datetime="2024-05-10T05:31:11.691Z" title="更新于 2024-05-10 13:31:11">2024-05-10</time></div></div><div 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