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<meta property="og:description" content="Linux开启/关闭防火墙的命令 12345678910# 检查防火墙状态：systemctl status firewalld# 开启防火墙systemctl start firewalld# 关闭防火墙(有时间限制)systemctl stop firewalld# 设置开机禁用防火墙(先执行上面一条命令之后执行此命令,即可永久关闭)systemctl disable firewal">
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href="https://www.tutorialspoint.com/compile_java8_online.php"><i class="fa-fw fas fa-code"></i><span> 代码</span></a></div><div class="menus_item"><a class="site-page" href="/notice/"><i class="fa-fw fas fa-stream"></i><span> 公告</span></a></div><div class="menus_item"><a class="site-page" href="/website/"><i class="fa-fw fas fa-list"></i><span> 网址</span></a></div><div class="menus_item"><a class="site-page" href="/record/"><i class="fa-fw fas fa-bars"></i><span> 记录</span></a></div><div class="menus_item"><a class="site-page" href="https://jasonsgong.github.io"><i class="fa-fw fas fa-wave-square"></i><span> 镜像</span></a></div><div class="menus_item"><a class="site-page" href="/"><i class="fa-fw fas fa-home"></i><span> 主页</span></a></div></div><div id="toggle-menu"><a class="site-page" href="javascript:void(0);"><i class="fas fa-bars fa-fw"></i></a></div></div></nav></header><main class="layout" id="content-inner"><div id="post"><div id="post-info"><h1 class="post-title">细节知识</h1><div id="post-meta"><div class="meta-firstline"><span class="post-meta-date"><i class="far fa-calendar-alt fa-fw post-meta-icon"></i><span class="post-meta-label">发表于</span><time class="post-meta-date-created" datetime="2023-04-28T10:11:44.000Z" title="发表于 2023-04-28 18:11:44">2023-04-28</time><span class="post-meta-separator">|</span><i class="fas fa-history fa-fw post-meta-icon"></i><span class="post-meta-label">更新于</span><time class="post-meta-date-updated" datetime="2023-09-11T23:36:48.000Z" title="更新于 2023-09-12 07:36:48">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%90%8E%E7%AB%AF/">后端</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">593</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>2分钟</span></span><span class="post-meta-separator">|</span><span class="post-meta-pv-cv" id="" data-flag-title="细节知识"><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>Linux开启/关闭防火墙的命令</p>
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<figure class="highlight shell"><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="meta prompt_"># </span><span class="language-bash">检查防火墙状态：</span></span><br><span class="line">systemctl status firewalld</span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">开启防火墙</span></span><br><span class="line">systemctl start firewalld</span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">关闭防火墙(有时间限制)</span></span><br><span class="line">systemctl stop firewalld</span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">设置开机禁用防火墙(先执行上面一条命令之后执行此命令,即可永久关闭)</span></span><br><span class="line">systemctl disable firewalld.service</span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">设置开机启用防火墙</span></span><br><span class="line">systemctl enable firewalld.service</span><br></pre></td></tr></table></figure>
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<p>windows查看端口占用情况,杀死端口的命令</p>
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<figure class="highlight shell"><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="meta prompt_"># </span><span class="language-bash">查询被占用的端口号的信息</span></span><br><span class="line">netstat -ano | findstr "8080"</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">根据端口号的PID杀死该端口的进程 其中 17156 是8080端口的PID值</span></span><br><span class="line">taskkill /pid 17156 /f</span><br></pre></td></tr></table></figure>
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<p>Linux开启关闭键盘背光灯</p>
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<figure class="highlight shell"><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="meta prompt_">#</span><span class="language-bash">不是永久有效的</span></span><br><span class="line"><span class="meta prompt_"># </span><span class="language-bash">开启键盘背光灯</span></span><br><span class="line">xset led named "Scroll Lock"</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">关闭键盘背光灯</span></span><br><span class="line">xset -led named "Scroll Lock"</span><br></pre></td></tr></table></figure>
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<p>关闭Mysql的服务</p>
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<figure class="highlight shell"><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="meta prompt_">#</span><span class="language-bash">查找是否安装了mysql的服务</span></span><br><span class="line">rpm -qa | grep -i mysql</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">查看mysql服务的状态</span></span><br><span class="line">service mysqld status</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">关闭mysql的服务</span></span><br><span class="line">service mysqld stop</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">重启的命令</span></span><br><span class="line">service mysqld restart</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">关闭开机自启动</span></span><br><span class="line">systemctl disable mysqld</span><br></pre></td></tr></table></figure>
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<p>前端向后端传递对象数据</p>
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<p>传递普通对象参数的写法</p>
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<p>params: searchObj</p>
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<figure class="highlight javascript"><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></pre></td><td class="code"><pre><span class="line"><span class="title function_">getPageList</span>(<span class="params">current,limit,searchObj</span>){</span><br><span class="line"> <span class="keyword">return</span> <span class="title function_">request</span>({</span><br><span class="line"> <span class="attr">url</span>: <span class="string">`<span class="subst">${api_name}</span>/<span class="subst">${current}</span>/<span class="subst">${limit}</span>`</span>,</span><br><span class="line"> <span class="attr">method</span>: <span class="string">'get'</span>,</span><br><span class="line"> <span class="attr">params</span>: searchObj <span class="comment">//使用这种方式进行传递</span></span><br><span class="line"> })</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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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></pre></td><td class="code"><pre><span class="line"><span class="meta">@GetMapping("/{page}/{limit}")</span></span><br><span class="line"><span class="keyword">public</span> Result <span class="title function_">pageQueryRole</span><span class="params">(<span class="meta">@PathVariable</span> Long page,</span></span><br><span class="line"><span class="params"> <span class="meta">@PathVariable</span> Integer limit,</span></span><br><span class="line"><span class="params"> SysRoleQueryVo sysRoleQueryVo)</span> { <span class="comment">//普通的对象进行接收 没有添加注解</span></span><br><span class="line"></span><br><span class="line"> Page<SysRole> pageParam = <span class="keyword">new</span> <span class="title class_">Page</span><>(page, limit);</span><br><span class="line"> LambdaQueryWrapper<SysRole> queryWrapper = <span class="keyword">new</span> <span class="title class_">LambdaQueryWrapper</span><>();</span><br><span class="line"> queryWrapper.like(!StringUtils.isEmpty(sysRoleQueryVo.getRoleName()),SysRole::getRoleName, sysRoleQueryVo.getRoleName());</span><br><span class="line"> Page<SysRole> sysRolePage = sysRoleService.page(pageParam, queryWrapper);</span><br><span class="line"> <span class="keyword">return</span> Result.ok(sysRolePage);</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
|
||
|
||
<p>json格式的传递</p>
|
||
<p>data: searchObj</p>
|
||
<figure class="highlight javascript"><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></pre></td><td class="code"><pre><span class="line"><span class="title function_">add</span>(<span class="params">sysRole</span>){</span><br><span class="line"> <span class="keyword">return</span> <span class="title function_">request</span>({</span><br><span class="line"> <span class="attr">url</span>: <span class="string">`<span class="subst">${api_name}</span>/save`</span>,</span><br><span class="line"> <span class="attr">method</span>: <span class="string">'post'</span>,</span><br><span class="line"> <span class="attr">data</span>: sysRole <span class="comment">//使用这种方式进行传递</span></span><br><span class="line"> })</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
|
||
|
||
<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="meta">@PostMapping("/save")</span></span><br><span class="line"> <span class="keyword">public</span> Result <span class="title function_">save</span><span class="params">(<span class="meta">@RequestBody</span> SysRole sysRole)</span>{ <span class="comment">//JSON格式对象的传递 需要使用注解@RequestBody</span></span><br><span class="line"> <span class="type">boolean</span> <span class="variable">isSave</span> <span class="operator">=</span> sysRoleService.save(sysRole);</span><br><span class="line"> <span class="keyword">return</span> isSave? Result.ok() : Result.fail();</span><br><span class="line"> }</span><br></pre></td></tr></table></figure>
|
||
|
||
|
||
|
||
<p>调整日志的级别</p>
|
||
<figure class="highlight yaml"><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="attr">logging:</span></span><br><span class="line"> <span class="attr">level:</span></span><br><span class="line"> <span class="comment"># 注意这里包的路径，要根据实际情况t</span></span><br><span class="line"> <span class="attr">com.atguigu.gulimall:</span> <span class="string">debug</span></span><br></pre></td></tr></table></figure>
|
||
|
||
|
||
|
||
<p>@JsonInclude注解</p>
|
||
<figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">@JsonInclude(JsonInclude.Include.NON_EMPTY)</span><span class="comment">//这里是当children为空的时候，向前端传递数据就不带这个</span></span><br><span class="line"><span class="keyword">private</span> List<CategoryEntity> children;</span><br></pre></td></tr></table></figure>
|
||
|
||
|
||
|
||
<p>node相关的问题</p>
|
||
<figure class="highlight shell"><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="meta prompt_">#</span><span class="language-bash">查看node的版本</span></span><br><span class="line">node -v</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">查看npm的版本</span></span><br><span class="line">npm -v</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">查看npm使用的镜像源(npm镜像源)</span></span><br><span class="line">npm get registry</span><br><span class="line"><span class="meta prompt_">#</span><span class="language-bash">设置淘宝镜像源</span></span><br><span class="line">npm config set registry http://registry.npm.taobao.org</span><br></pre></td></tr></table></figure>
|
||
|
||
|
||
|
||
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