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<?xml version="1.0" encoding="utf-8"?>
<search>
<entry>
<title>使用 Git 进行版本管理</title>
<link href="/posts/8256.html"/>
<url>/posts/8256.html</url>
<content type="html"><![CDATA[<h1 id="使用-Git-进行版本管理"><a href="#使用-Git-进行版本管理" class="headerlink" title="使用 Git 进行版本管理"></a>使用 Git 进行版本管理</h1><p><img src="https://gitee.com/section2014/PicGoPictureBed/raw/master/assets/f7246b600c338744a9591cd7530fd9f9d62aa0f8.png" alt="Git"></p><p>Git 是一个开源的分布式版本控制系统，用于敏捷高效地处理任何或小或大的项目。<br>Git 是 Linus Torvalds 为了帮助管理 Linux 内核开发而开发的一个开放源码的版本控制软件。<br>Git 与常用的版本控制工具 CVS, Subversion 等不同，它采用了分布式版本库的方式，不必服务器端软件支持。</p><h2 id="Git-与-SVN-区别"><a href="#Git-与-SVN-区别" class="headerlink" title="Git 与 SVN 区别"></a>Git 与 SVN 区别</h2><p>Git 不仅仅是个版本控制系统，它也是个内容管理系统(CMS)，工作管理系统等。</p><p>如果你是一个具有使用 SVN 背景的人，你需要做一定的思想转换，来适应 Git 提供的一些概念和特征。<br>Git 与 SVN 区别点：</p><ul><li><p><strong>1、Git 是分布式的，SVN 不是</strong>：这是 Git 和其它非分布式的版本控制系统，例如 SVN，CVS 等，最核心的区别。</p></li><li><p><strong>2、Git 把内容按元数据方式存储，而 SVN 是按文件：</strong>所有的资源控制系统都是把文件的元信息隐藏在一个类似 .svn、.cvs 等的文件夹里。</p></li><li><p><strong>3、Git 分支和 SVN 的分支不同：</strong>分支在 SVN 中一点都不特别，其实它就是版本库中的另外一个目录。</p></li><li><p><strong>4、Git 没有一个全局的版本号，而 SVN 有：</strong>目前为止这是跟 SVN 相比 Git 缺少的最大的一个特征。</p></li><li><p><strong>5、Git 的内容完整性要优于 SVN：</strong>Git 的内容存储使用的是 SHA-1 哈希算法。这能确保代码内容的完整性，确保在遇到磁盘故障和网络问题时降低对版本库的破坏。</p></li></ul><p><img src="https://gitee.com/section2014/PicGoPictureBed/raw/master/assets/0D32F290-80B0-4EA4-9836-CA58E22569B3.jpg" alt="Git 与 SVN 区别"></p><h2 id="Git-本地操作命令"><a href="#Git-本地操作命令" class="headerlink" title="Git 本地操作命令"></a>Git 本地操作命令</h2><pre class="line-numbers language-bash"><code class="language-bash"><span class="token comment" spellcheck="true">## Git 账号信息配置</span><span class="token comment" spellcheck="true">## global </span><span class="token function">git</span> config --global user.name <span class="token string">"xxx"</span> <span class="token function">git</span> config --global user.email <span class="token string">""</span><span class="token comment" spellcheck="true">## local</span><span class="token function">git</span> config user.name <span class="token string">"xxx"</span> <span class="token function">git</span> config user.email <span class="token string">""</span><span class="token comment" spellcheck="true">## 初始化 Git 本地仓库</span><span class="token comment" spellcheck="true"># 初始化当前目录</span><span class="token function">git</span> init<span class="token comment" spellcheck="true"># 初始化指定目录，目录不存在则创建新目录</span><span class="token function">git</span> init newrepo<span class="token comment" spellcheck="true">## 添加文件到 Git 管理</span><span class="token function">git</span> add filename<span class="token comment" spellcheck="true"># 添加当前目录所有文件</span><span class="token function">git</span> add <span class="token keyword">.</span><span class="token comment" spellcheck="true">## 删除</span><span class="token function">git</span> <span class="token function">rm</span> <span class="token function">file</span><span class="token comment" spellcheck="true">## 提交文件到本地仓库</span><span class="token function">git</span> commit -m <span class="token string">"commit msg"</span><span class="token comment" spellcheck="true"># commit 命令的-a选项可将所有被修改或者已删除的且已经被git管理的文档提交到仓库中</span><span class="token comment" spellcheck="true"># 注意：-a不会造成新文件被提交，只能修改</span><span class="token function">git</span> commit -a -m <span class="token string">"Changed some files"</span><span class="token comment" spellcheck="true">## 分支管理</span><span class="token comment" spellcheck="true"># 创建本地分支</span><span class="token comment" spellcheck="true"># branch 命令不会将我们带入分支，只是创建一个新分支</span><span class="token function">git</span> branch <span class="token function">test</span><span class="token comment" spellcheck="true">## 删除本地分支</span><span class="token function">git</span> branch -d <span class="token function">test</span><span class="token comment" spellcheck="true">## 更改我们所在的分支</span><span class="token function">git</span> checkout <span class="token function">test</span><span class="token comment" spellcheck="true"># 第一个分支，或主分支，被称为"master"。</span><span class="token function">git</span> checkout master<span class="token comment" spellcheck="true">## 合并其他分支的更改到主分支</span><span class="token function">git</span> checkout master<span class="token function">git</span> merge <span class="token function">test</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><h2 id="Git-远程交互命令"><a href="#Git-远程交互命令" class="headerlink" title="Git 远程交互命令"></a>Git 远程交互命令</h2><pre class="line-numbers language-bash"><code class="language-bash"><span class="token comment" spellcheck="true"># 设置远程主机名</span><span class="token function">git</span> remote add origin https://gitee.com/section2014/notes.git<span class="token comment" spellcheck="true">## 将内容推送到服务器</span><span class="token comment" spellcheck="true"># git push <远程主机名> <本地分支名>:<远程分支名></span><span class="token comment" spellcheck="true"># 如果省略远程分支名，则表示将本地分支推送与之存在"追踪关系"的远程分支（通常两者同名）</span><span class="token comment" spellcheck="true"># 如果该远程分支不存在，则会被新建。</span><span class="token function">git</span> push -u origin master <span class="token comment" spellcheck="true"># 将本地的master分支推送到origin主机的master分支。如果后者不存在，则会被新建。</span><span class="token function">git</span> push ssh://example.com/~/www/project.git<span class="token function">git</span> push --set-upstream https://gitee.com/section2014/notes.git master<span class="token comment" spellcheck="true">## 将服务器内容拉取到本地</span><span class="token comment" spellcheck="true"># 从服务器克隆一个库</span><span class="token function">git</span> clone --depth<span class="token operator">=</span>1 https://github.com/vueComponent/ant-design-vue-pro.git <span class="token punctuation">[</span>my-project<span class="token punctuation">]</span><span class="token comment" spellcheck="true"># 从服务器拉取更新内容</span><span class="token function">git</span> pull<span class="token function">git</span> pull http://git.example.com/project.git<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><h2 id="情景演示"><a href="#情景演示" class="headerlink" title="情景演示"></a>情景演示</h2><h3 id="从0开始创建新仓库"><a href="#从0开始创建新仓库" class="headerlink" title="从0开始创建新仓库"></a>从0开始创建新仓库</h3><pre class="line-numbers language-bash"><code class="language-bash"><span class="token function">git</span> clone https://git.inspur.com/iNOS/icloud/nscs-api.git<span class="token function">cd</span> nscs-api <span class="token function">touch</span> README.md <span class="token function">git</span> add README.md <span class="token function">git</span> commit -m <span class="token string">"add README"</span> <span class="token function">git</span> push -u origin master<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><h3 id="推送已经存在的文件夹到远程仓库"><a href="#推送已经存在的文件夹到远程仓库" class="headerlink" title="推送已经存在的文件夹到远程仓库"></a>推送已经存在的文件夹到远程仓库</h3><pre class="line-numbers language-bash"><code class="language-bash"><span class="token function">cd</span> existing_folder<span class="token function">git</span> init<span class="token function">git</span> remote add origin https://git.inspur.com/iNOS/icloud/nscs-api.git<span class="token function">git</span> add <span class="token keyword">.</span> <span class="token function">git</span> commit -m <span class="token string">"Initial commit"</span> <span class="token function">git</span> push -u origin master<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><h3 id="推送已经被-Git-管理的文件夹到远程仓库"><a href="#推送已经被-Git-管理的文件夹到远程仓库" class="headerlink" title="推送已经被 Git 管理的文件夹到远程仓库"></a>推送已经被 Git 管理的文件夹到远程仓库</h3><pre class="line-numbers language-bash"><code class="language-bash"><span class="token function">cd</span> existing_repo<span class="token function">git</span> remote <span class="token function">rename</span> origin old-origin <span class="token function">git</span> remote add origin http://git.inspur.com/iNOS/icloud/nscs-view.git<span class="token function">git</span> push -u origin --all <span class="token function">git</span> push -u origin --tags<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span></span></code></pre><h3 id="提交修改内容"><a href="#提交修改内容" class="headerlink" title="提交修改内容"></a>提交修改内容</h3><p>git commit -m “更新文章”</p><pre><code>git pullgit add .git commit -a -m "Changed some files"git push -u origin master</code></pre><h2 id="附：Windows-CMD命令"><a href="#附：Windows-CMD命令" class="headerlink" title="附：Windows CMD命令"></a>附：Windows CMD命令</h2><p>删除文件 <code>del 文件名</code><br>删除文件夹<code>rd 文件夹名</code><br>相关参数：/s参数为子目录，/q参数为不用确认。</p><p>示例：</p><pre class="line-numbers language-basic"><code class="language-basic"># 删除文件del <span class="token number">123.</span>txt# 删除文件夹rd nocc<span class="token operator">-</span>viewrd<span class="token operator">/</span>s<span class="token operator">/</span>q nocc<span class="token operator">-</span>view<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span></span></code></pre><script> document.querySelectorAll('.github-emoji') .forEach(el => { if (!el.dataset.src) { return; } const img = document.createElement('img'); img.style = 'display:none !important;'; img.src = el.dataset.src; img.addEventListener('error', () => { img.remove(); el.style.color = 'inherit'; el.style.backgroundImage = 'none'; el.style.background = 'none'; }); img.addEventListener('load', () => { img.remove(); }); document.body.appendChild(img); }); </script>]]></content>
<categories>
<category> 版本管理 </category>
</categories>
<tags>
<tag> 版本管理 </tag>
<tag> Git </tag>
</tags>
</entry>
<entry>
<title>NodeJs 基础篇</title>
<link href="/posts/26981.html"/>
<url>/posts/26981.html</url>
<content type="html"><![CDATA[<h1 id="NodeJs-基础篇"><a href="#NodeJs-基础篇" class="headerlink" title="NodeJs 基础篇"></a>NodeJs 基础篇</h1><h2 id="Node-和-npm-工具的安装与验证"><a href="#Node-和-npm-工具的安装与验证" class="headerlink" title="Node 和 npm 工具的安装与验证"></a>Node 和 npm 工具的安装与验证</h2><ol><li>验证 Node 安装。<code>node -v</code></li><li>安装 Node 默认安装 npm 工具，验证 npm 安装。<code>npm -v</code></li></ol><h2 id="npm-仓库的查看与配置"><a href="#npm-仓库的查看与配置" class="headerlink" title="npm 仓库的查看与配置"></a>npm 仓库的查看与配置</h2><p>查看 npm 镜像。</p><pre class="line-numbers language-bash"><code class="language-bash"><span class="token function">npm</span> config get registry<span class="token comment" spellcheck="true"># https://registry.npmjs.org/</span><span class="token comment" spellcheck="true"># 设置npm镜像</span><span class="token function">npm</span> config <span class="token keyword">set</span> registry https://registry.npm.taobao.org<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span></span></code></pre><blockquote><p><a href="https://panjiachen.github.io/vue-element-admin-site/zh/guide/#安装" target="_blank" rel="noopener">https://panjiachen.github.io/vue-element-admin-site/zh/guide/#安装</a></p><p><strong>TIP(vue-element-admin)</strong></p><p>强烈建议不要用直接使用 cnpm 安装，会有各种诡异的 bug，可以通过重新指定 registry 来解决 npm 安装速度慢的问题。若还是不行，可使用 <a href="https://github.com/yarnpkg/yarn" target="_blank" rel="noopener">yarn</a> 替代 <code>npm</code>。</p></blockquote><h2 id="npm-推荐换源-或-cnpm-的依赖管理"><a href="#npm-推荐换源-或-cnpm-的依赖管理" class="headerlink" title="npm(推荐换源) 或 cnpm 的依赖管理"></a>npm(推荐换源) 或 cnpm 的依赖管理</h2><ol><li><p>使用 npm 工具安装依赖。使用 npm 工具安装依赖 <code>npm install xxx</code>。</p><pre class="line-numbers language-bash"><code class="language-bash"><span class="token comment" spellcheck="true"># 各种安装的区别</span><span class="token comment" spellcheck="true"># 全局依赖安装</span><span class="token comment" spellcheck="true"># 1. 将安装包放在 /usr/local 下或者你 node 的安装目录。</span><span class="token comment" spellcheck="true"># 2. 可以直接在命令行里使用。</span><span class="token function">npm</span> <span class="token function">install</span> xxx -g<span class="token comment" spellcheck="true"># 会把依赖安装到 node_modules 中；</span><span class="token comment" spellcheck="true"># 不会修改 package.json，之后运行 npm install 命令时不会自动安装。</span><span class="token function">npm</span> <span class="token function">install</span> xxx<span class="token comment" spellcheck="true"># 会把依赖安装到 node_modules 中；</span><span class="token comment" spellcheck="true"># 会添加依赖到 package.json 的 dependencies 属性下，之后运行 npm install 命令时安装依赖到 node_modules</span><span class="token comment" spellcheck="true"># 之后运行 npm install –production 或者注明 NODE_ENV 变量值为 production 时，会安装到 node_modules</span><span class="token function">npm</span> <span class="token function">install</span> xxx --save<span class="token function">npm</span> <span class="token function">install</span> xxx -S<span class="token comment" spellcheck="true"># 会把依赖安装到 node_modules 中；</span><span class="token comment" spellcheck="true"># 会添加依赖到 package.json 的 devDependencies 属性下，之后运行 npm install 命令时安装依赖到 node_modules</span><span class="token comment" spellcheck="true"># 之后运行 npm install –production 或者注明 NODE_ENV 变量值为 production 时，不会安装到 node_modules</span><span class="token function">npm</span> <span class="token function">install</span> xxx --save-dev<span class="token function">npm</span> <span class="token function">install</span> xxx -D<span class="token comment" spellcheck="true">## 使用原则：运行时需要用到的依赖使用 –-save，否则开发时用到的依赖使用 -–save-dev</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre></li><li><p>国外镜像速度较慢，安装 cnpm 工具。使用 cnpm 工具安装依赖 <code>cnpm install xxx</code>。 </p><pre class="line-numbers language-bash"><code class="language-bash"><span class="token function">npm</span> <span class="token function">install</span> -g cnpm --registry<span class="token operator">=</span>https://registry.npm.taobao.org<span class="token comment" spellcheck="true"># 验证</span>cnpm -v<span class="token comment" spellcheck="true"># cnpm@6.1.1 (C:\Users\guo.wl\AppData\Roaming\npm\node_modules\cnpm\lib\parse_argv.js)</span><span class="token comment" spellcheck="true"># npm@6.14.5 (C:\Users\guo.wl\AppData\Roaming\npm\node_modules\cnpm\node_modules\npm\lib\npm.js)</span><span class="token comment" spellcheck="true"># node@12.16.3 (D:\Program Files\nodejs\node.exe)</span><span class="token comment" spellcheck="true"># npminstall@3.27.0 (C:\Users\guo.wl\AppData\Roaming\npm\node_modules\cnpm\node_modules\npminstall\lib\index.js)</span><span class="token comment" spellcheck="true"># prefix=C:\Users\guo.wl\AppData\Roaming\npm</span><span class="token comment" spellcheck="true"># win32 x64 10.0.18363</span><span class="token comment" spellcheck="true"># registry=https://r.npm.taobao.org</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre></li><li><p>使用 npm/cnpm 工具卸载依赖。<code>npm uninstall xxx</code>/<code>cnpm uninstall xxx</code>。</p></li></ol><h2 id="node-modules-的删除"><a href="#node-modules-的删除" class="headerlink" title="node_modules 的删除"></a>node_modules 的删除</h2><p>删除 node_modules 文件夹</p><pre class="line-numbers language-bash"><code class="language-bash"><span class="token function">npm</span> <span class="token function">install</span> rimraf -grimraf node_modules<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span></span></code></pre><h2 id="使用示例"><a href="#使用示例" class="headerlink" title="使用示例"></a>使用示例</h2><pre class="line-numbers language-bash"><code class="language-bash"><span class="token comment" spellcheck="true"># npm install -g @vue/cli</span><span class="token function">npm</span> i -g @vue/cli<span class="token function">npm</span> <span class="token function">install</span> axios --save<span class="token function">npm</span> <span class="token function">install</span> webpack -g<span class="token function">npm</span> <span class="token function">install</span> webpack-cli -g<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><script> document.querySelectorAll('.github-emoji') .forEach(el => { if (!el.dataset.src) { return; } const img = document.createElement('img'); img.style = 'display:none !important;'; img.src = el.dataset.src; img.addEventListener('error', () => { img.remove(); el.style.color = 'inherit'; el.style.backgroundImage = 'none'; el.style.background = 'none'; }); img.addEventListener('load', () => { img.remove(); }); document.body.appendChild(img); }); </script>]]></content>
<categories>
<category> 前端 </category>
</categories>
<tags>
<tag> NodeJS </tag>
<tag> npm </tag>
</tags>
</entry>
<entry>
<title>Java 开发中的各种 O</title>
<link href="/posts/54109.html"/>
<url>/posts/54109.html</url>
<content type="html"><![CDATA[<h1 id="Java-开发中的各种-O"><a href="#Java-开发中的各种-O" class="headerlink" title="Java 开发中的各种 O"></a>Java 开发中的各种 O</h1><h5 id="POJO"><a href="#POJO" class="headerlink" title="POJO"></a>POJO</h5><p>Plain Ordinary Java Object</p><p>简单Java对象，就是一个我们最常见的普通Java对象。它具有一些属性，然后提供对应的getter和setter。</p><h5 id="JavaBean"><a href="#JavaBean" class="headerlink" title="JavaBean"></a>JavaBean</h5><p>可序列化的POJO。它需要实现序列化接口<code>java.io.Serializable</code>。</p><h5 id="DO"><a href="#DO" class="headerlink" title="DO"></a>DO</h5><p>Domain Object [ DDD(领域驱动设计) ]</p><p>领域对象，也就是ORM框架中对应数据库的对象，业务实体。例如，对现实世界中的用户建模，抽象出来的DO可以叫为UserDO，通常情况下它用于与数据库的数据交互，通常也是一个JavaBean。</p><h5 id="PO"><a href="#PO" class="headerlink" title="PO"></a>PO</h5><p>Persistent Object</p><p>持久化对象，主要用于持久化层，与数据库对应，通常也是ORM框架中的实体对象，例如，使用JPA时候的Entity与数据库表做映射，通常是一个JavaBean。</p><p><strong>DO 和 PO 大部分时间是一样的，不过PO更倾向于有状态的对象。</strong></p><h5 id="DTO"><a href="#DTO" class="headerlink" title="DTO"></a>DTO</h5><p>Data Transfer Object</p><p>数据传输对象， 顾名思义就是用于传输数据的对象，通常用于处于不同架构层次或者不同子系统之间的数据传递，或者用于外部接口参数传递，以便提供不同粒度不同信息的数据，以免造成困惑干扰，通常也是一个JavaBean。Service 或 Manager 向外传输的对象。</p><h5 id="VO"><a href="#VO" class="headerlink" title="VO"></a>VO</h5><p>Value Object/View Object</p><p>就是用于保存数据的对象；在提供给页面使用的时候，也有人解释为View Object，就是对应页面展示数据的对象。显示层对象，通常是 Web 向模板渲染引擎层传输的对象。</p><p><strong>VO 里的每一个字段，是和你前台 html 页面相对应。</strong></p><h5 id="Query"><a href="#Query" class="headerlink" title="Query"></a>Query</h5><p>xxQuery</p><p>数据查询对象，各层接收上层的查询请求。</p><h5 id="其他"><a href="#其他" class="headerlink" title="其他"></a>其他</h5><ul><li><strong>BO（ Business Object）：</strong> 业务对象， 由 Service 层输出的封装业务逻辑的对象。</li><li><strong>AO（ Application Object）：</strong> 应用对象， 在 Web 层与 Service 层之间抽象的复用对象模型，极为贴近展示层，复用度不高。</li></ul><script> document.querySelectorAll('.github-emoji') .forEach(el => { if (!el.dataset.src) { return; } const img = document.createElement('img'); img.style = 'display:none !important;'; img.src = el.dataset.src; img.addEventListener('error', () => { img.remove(); el.style.color = 'inherit'; el.style.backgroundImage = 'none'; el.style.background = 'none'; }); img.addEventListener('load', () => { img.remove(); }); document.body.appendChild(img); }); </script>]]></content>
<categories>
<category> Java </category>
</categories>
<tags>
<tag> 领域模型 </tag>
<tag> 微服务 </tag>
</tags>
</entry>
<entry>
<title>Spring Boot 整合 MyBatis-Plus 和 PageHelper</title>
<link href="/posts/24223.html"/>
<url>/posts/24223.html</url>
<content type="html"><![CDATA[<h1 id="Spring-Boot-集成-MyBatis-Plus-和-PageHelper"><a href="#Spring-Boot-集成-MyBatis-Plus-和-PageHelper" class="headerlink" title="Spring Boot 集成 MyBatis-Plus 和 PageHelper"></a>Spring Boot 集成 MyBatis-Plus 和 PageHelper</h1><h2 id="什么是-MyBatis-Plus？"><a href="#什么是-MyBatis-Plus？" class="headerlink" title="什么是 MyBatis-Plus？"></a>什么是 MyBatis-Plus？</h2><p><a href="https://mp.baomidou.com" target="_blank" rel="noopener">MyBatis-Plus</a></p><p>MyBatis-Plus（简称 MP）是一个 MyBatis 的增强工具，在 MyBatis 的基础上只做增强不做改变，为简化开发、提高效率而生。</p><h3 id="POM"><a href="#POM" class="headerlink" title="POM"></a>POM</h3><p>在 <code>pom.xml</code> 文件中引入 <code>mybatis-plus-boot-starter</code> 依赖，该依赖会自动引入 MyBaits 相关依赖</p><pre class="line-numbers language-xml"><code class="language-xml"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>properties</span><span class="token punctuation">></span></span> <span class="token comment" spellcheck="true"><!-- orm --></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>mybatis-plus-boot-starter.version</span><span class="token punctuation">></span></span>3.3.1<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>mybatis-plus-boot-starter.version</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>properties</span><span class="token punctuation">></span></span><span class="token comment" spellcheck="true"><!-- orm --></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependency</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>groupId</span><span class="token punctuation">></span></span>com.baomidou<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>groupId</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>artifactId</span><span class="token punctuation">></span></span>mybatis-plus-boot-starter<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>artifactId</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>version</span><span class="token punctuation">></span></span>${mybatis-plus-boot-starter.version}<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>version</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependency</span><span class="token punctuation">></span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><h3 id="application-yml"><a href="#application-yml" class="headerlink" title="application.yml"></a>application.yml</h3><pre class="line-numbers language-yaml"><code class="language-yaml"><span class="token comment" spellcheck="true">## MyBatis-Plus</span><span class="token key atrule">mybatis-plus</span><span class="token punctuation">:</span> <span class="token key atrule">mapper-locations</span><span class="token punctuation">:</span> classpath*<span class="token punctuation">:</span>/mapper/**/*.xml <span class="token key atrule">global-config</span><span class="token punctuation">:</span> <span class="token key atrule">banner</span><span class="token punctuation">:</span> <span class="token boolean important">false</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span></span></code></pre><h3 id="创建配置文件"><a href="#创建配置文件" class="headerlink" title="创建配置文件"></a>创建配置文件</h3><p>创建 MyBatis-Plus 配置文件，设置 MyBatis-Plus 要扫描 mapper 的包路径 com.inspur.boot.volume.*.mapper</p><pre class="line-numbers language-java"><code class="language-java"><span class="token keyword">import</span> com<span class="token punctuation">.</span>baomidou<span class="token punctuation">.</span>mybatisplus<span class="token punctuation">.</span>extension<span class="token punctuation">.</span>plugins<span class="token punctuation">.</span>PaginationInterceptor<span class="token punctuation">;</span><span class="token keyword">import</span> com<span class="token punctuation">.</span>baomidou<span class="token punctuation">.</span>mybatisplus<span class="token punctuation">.</span>extension<span class="token punctuation">.</span>plugins<span class="token punctuation">.</span>pagination<span class="token punctuation">.</span>optimize<span class="token punctuation">.</span>JsqlParserCountOptimize<span class="token punctuation">;</span><span class="token keyword">import</span> org<span class="token punctuation">.</span>mybatis<span class="token punctuation">.</span>spring<span class="token punctuation">.</span>annotation<span class="token punctuation">.</span>MapperScan<span class="token punctuation">;</span><span class="token keyword">import</span> org<span class="token punctuation">.</span>springframework<span class="token punctuation">.</span>context<span class="token punctuation">.</span>annotation<span class="token punctuation">.</span>Bean<span class="token punctuation">;</span><span class="token keyword">import</span> org<span class="token punctuation">.</span>springframework<span class="token punctuation">.</span>context<span class="token punctuation">.</span>annotation<span class="token punctuation">.</span>Configuration<span class="token punctuation">;</span><span class="token keyword">import</span> org<span class="token punctuation">.</span>springframework<span class="token punctuation">.</span>transaction<span class="token punctuation">.</span>annotation<span class="token punctuation">.</span>EnableTransactionManagement<span class="token punctuation">;</span><span class="token comment" spellcheck="true">/** * Mybatis Plus 配置类 * * @author Guo.wl */</span><span class="token annotation punctuation">@Configuration</span> <span class="token comment" spellcheck="true">// 配置类</span><span class="token annotation punctuation">@EnableTransactionManagement</span> <span class="token comment" spellcheck="true">// 开启事务</span><span class="token annotation punctuation">@MapperScan</span><span class="token punctuation">(</span>basePackages <span class="token operator">=</span> <span class="token string">"com.inspur.boot.volume.*.mapper"</span><span class="token punctuation">)</span> <span class="token comment" spellcheck="true">// 扫描 mapper 的包路径</span><span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">MybatisPlusConfig</span> <span class="token punctuation">{</span> <span class="token comment" spellcheck="true">/** * 分页 */</span> <span class="token annotation punctuation">@Bean</span> <span class="token keyword">public</span> PaginationInterceptor <span class="token function">paginationInterceptor</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> PaginationInterceptor paginationInterceptor <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">PaginationInterceptor</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment" spellcheck="true">// 设置请求的页面大于最大页后操作， true调回到首页，false 继续请求 默认false</span> paginationInterceptor<span class="token punctuation">.</span><span class="token function">setOverflow</span><span class="token punctuation">(</span><span class="token boolean">false</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment" spellcheck="true">// 设置最大单页限制数量，默认 500 条，-1 不受限制</span> paginationInterceptor<span class="token punctuation">.</span><span class="token function">setLimit</span><span class="token punctuation">(</span><span class="token number">500</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token comment" spellcheck="true">// 开启 count 的 join 优化,只针对部分 left join</span> paginationInterceptor<span class="token punctuation">.</span><span class="token function">setCountSqlParser</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">JsqlParserCountOptimize</span><span class="token punctuation">(</span><span class="token boolean">true</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">return</span> paginationInterceptor<span class="token punctuation">;</span> <span class="token punctuation">}</span><span class="token punctuation">}</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><h2 id="什么是-PageHelper"><a href="#什么是-PageHelper" class="headerlink" title="什么是 PageHelper"></a>什么是 PageHelper</h2><p><a href="https://github.com/pagehelper/Mybatis-PageHelper" target="_blank" rel="noopener">PageHelper</a></p><p>PageHelper 是 Mybatis 的分页插件，支持多数据库、多数据源。可以简化数据库的分页查询操作，整合过程也极其简单，只需引入依赖即可。</p><h3 id="POM-1"><a href="#POM-1" class="headerlink" title="POM"></a>POM</h3><p>在 <code>pom.xml</code> 文件中引入 <code>pagehelper-spring-boot-starter</code> 依赖</p><pre class="line-numbers language-xml"><code class="language-xml"><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>properties</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>pagehelper-spring-boot-starter.version</span><span class="token punctuation">></span></span>1.2.12<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>pagehelper-spring-boot-starter.version</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"></</span>properties</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"><</span>dependency</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>groupId</span><span class="token punctuation">></span></span>com.github.pagehelper<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>groupId</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>artifactId</span><span class="token punctuation">></span></span>pagehelper-spring-boot-starter<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>artifactId</span><span class="token punctuation">></span></span> <span class="token tag"><span class="token tag"><span class="token punctuation"><</span>version</span><span class="token punctuation">></span></span>${pagehelper-spring-boot-starter.version}<span class="token tag"><span class="token tag"><span class="token punctuation"></</span>version</span><span class="token punctuation">></span></span><span class="token tag"><span class="token tag"><span class="token punctuation"></</span>dependency</span><span class="token punctuation">></span></span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><h3 id="application-yml-1"><a href="#application-yml-1" class="headerlink" title="application.yml"></a>application.yml</h3><pre class="line-numbers language-yml"><code class="language-yml"># Mybatis分页插件pageHelperpagehelper: helper-dialect: mysql reasonable: true support-methods-arguments: false params: count=countSql<span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span><span></span></span></code></pre><h3 id="使用"><a href="#使用" class="headerlink" title="使用"></a>使用</h3><pre class="line-numbers language-java"><code class="language-java"><span class="token comment" spellcheck="true">// use static method startPage</span>PageHelper<span class="token punctuation">.</span><span class="token function">startPage</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">10</span><span class="token punctuation">)</span><span class="token punctuation">;</span>List<span class="token operator"><</span>User<span class="token operator">></span> list <span class="token operator">=</span> userMapper<span class="token punctuation">.</span><span class="token function">selectIf</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>PageInfo pageInfo <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">PageInfo</span><span class="token punctuation">(</span>list<span class="token punctuation">)</span><span class="token punctuation">;</span><span class="token comment" spellcheck="true">// pageInfo.getTotal() == 查询记录总数</span><span aria-hidden="true" class="line-numbers-rows"><span></span><span></span><span></span><span></span><span></span></span></code></pre><script> document.querySelectorAll('.github-emoji') .forEach(el => { if (!el.dataset.src) { return; } const img = document.createElement('img'); img.style = 'display:none !important;'; img.src = el.dataset.src; img.addEventListener('error', () => { img.remove(); el.style.color = 'inherit'; el.style.backgroundImage = 'none'; el.style.background = 'none'; }); img.addEventListener('load', () => { img.remove(); }); document.body.appendChild(img); }); </script>]]></content>
<categories>
<category> Spring Boot </category>
</categories>
<tags>
<tag> 微服务 </tag>
<tag> Spring Boot </tag>
</tags>
</entry>
<entry>
<title>Idea 和 eclipse 快捷键对照</title>
<link href="/posts/9298.html"/>
<url>/posts/9298.html</url>
<content type="html"><![CDATA[<h2 id="Idea-和-eclipse-快捷键对照"><a href="#Idea-和-eclipse-快捷键对照" class="headerlink" title="Idea 和 eclipse 快捷键对照"></a>Idea 和 eclipse 快捷键对照</h2><table><thead><tr><th><strong>描述</strong></th><th><strong>Eclipse</strong></th><th><strong>Intellij</strong></th></tr></thead><tbody><tr><td><strong>常用</strong></td><td></td><td></td></tr><tr><td>打开类或接口</td><td>Ctrl+Shift +T</td><td>Ctrl+N</td></tr><tr><td>打开文件/资源</td><td>Ctrl+Shift+R</td><td>Ctrl+Shift+N</td></tr><tr><td>搜索文本</td><td>Ctrl+F</td><td>Ctrl + F<br>Ctrl + R 查找替换</td></tr><tr><td>从接口方法到实现方法</td><td>左键</td><td>Ctrl+Alt+左键</td></tr><tr><td>代码格式化</td><td>Ctrl+Shift+F</td><td>Ctrl+Alt+L</td></tr><tr><td>清除无用import</td><td>Ctrl+Shift+O</td><td>Ctrl+Alt+O</td></tr><tr><td>撤回修改</td><td>Ctrl+Z</td><td>Ctrl+Z</td></tr><tr><td>恢复撤回修改</td><td>Ctrl+Y</td><td>Ctrl+Shift+Z</td></tr><tr><td>代码上移</td><td>Alt +方向键上</td><td>Shift+Alt +方向键上</td></tr><tr><td>代码下移</td><td>Alt +方向键下</td><td>Shift+Alt +方向键下</td></tr><tr><td>删除当前行</td><td>Ctrl+D</td><td>Ctrl+Y</td></tr><tr><td>复制当前行</td><td>Ctrl+Alt+方向键上/下</td><td>Ctrl+D</td></tr><tr><td>重构/抽取变量</td><td></td><td>Ctrl+Alt+V</td></tr><tr><td></td><td></td><td></td></tr><tr><td><strong>调试</strong></td><td></td><td></td></tr><tr><td>运行一行</td><td>F6</td><td>F8</td></tr><tr><td>步入</td><td>F5</td><td>F7<br>Alt+Shift+F7 强制步入</td></tr><tr><td>步出</td><td>待补充</td><td>Shift+F8</td></tr><tr><td>运行到下一个断点</td><td>F8</td><td>F9</td></tr><tr><td>回复运行</td><td></td><td></td></tr></tbody></table><script> document.querySelectorAll('.github-emoji') .forEach(el => { if (!el.dataset.src) { return; } const img = document.createElement('img'); img.style = 'display:none !important;'; img.src = el.dataset.src; img.addEventListener('error', () => { img.remove(); el.style.color = 'inherit'; el.style.backgroundImage = 'none'; el.style.background = 'none'; }); img.addEventListener('load', () => { img.remove(); }); document.body.appendChild(img); }); </script>]]></content>
<categories>
<category> tools </category>
</categories>
<tags>
<tag> Java </tag>
<tag> 工具 </tag>
<tag> 快捷键 </tag>
</tags>
</entry>
<entry>
<title>网优相关</title>
<link href="/posts/30400.html"/>
<url>/posts/30400.html</url>
<content type="html"><![CDATA[<h1 id="网优相关"><a href="#网优相关" class="headerlink" title="网优相关"></a>网优相关</h1><h2 id="小区、RRU、BBU、CLB-关系"><a href="#小区、RRU、BBU、CLB-关系" class="headerlink" title="小区、RRU、BBU、CLB 关系"></a>小区、RRU、BBU、CLB 关系</h2><p>RRU、BBU、CLB属于硬件，关系如下：</p><table><thead><tr><th>关系</th><th>RRU</th><th>BBU</th><th>CLB</th></tr></thead><tbody><tr><td>RRU和BBU</td><td>N</td><td>1</td><td></td></tr><tr><td>BBU和CLB</td><td></td><td>N</td><td>1</td></tr></tbody></table><p><strong>注：厂家所说的基带板的概念，指此处的BBU（基带板）和CLB（主控板）</strong></p><p>小区属于逻辑单元，与RRU硬件的关系是<code>N<->N</code>的，具体如下：</p><table><thead><tr><th>小区</th><th>RRU</th><th>描述</th></tr></thead><tbody><tr><td>1</td><td>1</td><td>一般情况下是这样的</td></tr><tr><td>N</td><td>1</td><td>室分小区，小区分类的情况</td></tr><tr><td>1</td><td>N</td><td>超级小区</td></tr></tbody></table><p><strong>3D-MIMO 小区 一定是 D频段小区</strong></p><script> document.querySelectorAll('.github-emoji') .forEach(el => { if (!el.dataset.src) { return; } const img = document.createElement('img'); img.style = 'display:none !important;'; img.src = el.dataset.src; img.addEventListener('error', () => { img.remove(); el.style.color = 'inherit'; el.style.backgroundImage = 'none'; el.style.background = 'none'; }); img.addEventListener('load', () => { img.remove(); }); document.body.appendChild(img); }); </script>]]></content>
<categories>
<category> 业务 </category>
</categories>
<tags>
<tag> 网优 </tag>
<tag> 整理 </tag>
</tags>
</entry>
</search>