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class="body-wrap"><div class="menu-l"><div class="canvas-wrap"><canvas data-colors="#eaeaea" data-sectionheight="100" data-contentid="js-content" id="myCanvas1" class="anm-canvas"></canvas></div><div id="js-content" class="content-ll"><article id="post-Git撤销修改" class="article article-type-post" itemscope itemprop="blogPost"><div class="article-inner"><header class="article-header"><h1 class="article-title" itemprop="name">Git撤销修改</h1><span id="busuanzi_container_page_pv" style="display:none" class="archive-article-date"><i class="icon-smile icon"></i> 阅读数：<span id="busuanzi_value_page_pv"></span>次 </span><a href="/Git%E6%92%A4%E9%94%80%E4%BF%AE%E6%94%B9.html" class="archive-article-date"><time datetime="2021-07-07T07:39:20.000Z" itemprop="datePublished"><i class="icon-calendar icon"></i>2021-07-07</time></a><div style="margin-top:10px"><span class="post-time"><span class="post-meta-item-icon"><i class="icon-statistics"></i> <span class="post-meta-item-text">字数统计:</span> <span class="post-count">1.1k字</span> </span></span><span class="post-time"> | <span class="post-meta-item-icon"><i class="icon-book icon"></i> <span class="post-meta-item-text">阅读时长≈</span> <span class="post-count">3分</span></span></span></div></header><div class="article-entry" itemprop="articleBody"><h1 id="Git撤销修改"><a href="#Git撤销修改" class="headerlink" title="Git撤销修改"></a>Git撤销修改</h1><p>本篇文章主要分为两部分，一是主要说明下如何使用<code>Git</code>来撤销对文件的修改，二是如何恢复误删的文件。以前一直没有弄明白，现在终于弄清了<code>QAQ</code>。在说操作之前，先说明下<code>Git</code>的<code>工作区</code>、<code>暂存区</code>和<code>版本库</code>的概念。先上图，用的是<a href="https://www.runoob.com/git/git-workspace-index-repo.html" target="_blank" rel="noopener">菜鸟教程</a>的图。</p><p><img src="https://www.runoob.com/wp-content/uploads/2015/02/1352126739_7909.jpg" alt=""></p><ul><li><strong>工作区：</strong>就是你在电脑里能看到的目录。</li><li><strong>暂存区：</strong>英文叫 stage 或 index。一般存放在 <strong><code>.git</code></strong> 目录下的 index 文件（.git/index）中，所以我们把暂存区有时也叫作索引（index）。</li><li><strong>版本库：</strong>工作区有一个隐藏目录 <strong><code>.git</code></strong>，这个不算工作区，而是 Git 的版本库。</li><li>当对<strong>工作区</strong>修改（或新增）的文件执行<code>git add</code>命令时，<strong>暂存区</strong>的目录树被更新，同时工作区修改（或新增）的文件内容被写入到对象库中的一个新的对象中，而该对象的ID被记录在暂存区的文件索引中。</li><li>当执行提交操作<code>git commit</code>时，<strong>暂存区</strong>的目录树写到<strong>版本库（对象库）</strong>中，<code>master</code>分支会做相应的更新。即 <code>master</code>指向的目录树就是提交时暂存区的目录树。</li></ul><a id="more"></a><hr><p>明白了以上概念后，接下来来说下如何撤销修改以及恢复删除的文件。</p><h2 id="一、撤销修改"><a href="#一、撤销修改" class="headerlink" title="一、撤销修改"></a>一、撤销修改</h2><p> 撤销修改分为以下三种情况：</p><ol><li>已经<code>push</code>推送到远程仓库。</li><li>已经<code>commit</code>提交到版本库。</li><li>已经<code>add</code>提交到暂存区。</li><li>暂未提交到暂存区，所有修改都在工作区。</li></ol><p> 接下来就这四种情况说明下如何撤销修改。</p><hr><ol><li><p>如果<code>push</code>到<strong>远程仓库</strong>了，并且没有远程仓库的管理权限，那就放弃把，没救了。</p></li><li><p>已经使用<code>commit</code>提交到了<strong>版本库</strong>。</p><blockquote><p>因为已经产生了新的提交，所以撤销修改可以使用<code>git reset --hard HEAD^</code>来回退到上一个版本，从而达到撤销修改的效果。</p></blockquote></li><li><p>已经使用<code>add</code>提交到<strong>暂存区</strong>，但是没有使用<code>commit</code>提交到<strong>版本库</strong>。</p><blockquote><p>因为已经提交到<strong>暂存区</strong>了，所以撤销修改需要先将提交到<strong>暂存区</strong>的修改拿回到<strong>工作区</strong>。</p><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">></span><span class="bash">git reset HEAD <file></span></span><br></pre></td></tr></table></figure><p>命令<code>git reset HEAD <file></code>可以把<strong>暂存区</strong>的修改撤销掉，重新放回<strong>工作区</strong>。==注意该命令和回退版本的命令的区别，因为很相似。==这样所有的修改就回到了<strong>工作区</strong>，丢弃<strong>工作区</strong>的修改只需执行以下命令。</p><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">></span><span class="bash">git checkout -- <file> <span class="comment"># 使用 git restore <file> 的效果一样</span></span></span><br></pre></td></tr></table></figure><p>命令<code>git checkout -- <file></code>会将<strong>工作区</strong>的修改撤回到最后一次<code>git add</code>或<code>git commit</code>时的状态。</p></blockquote></li><li><p>文件修改都在<strong>工作区</strong>，没有提交到<strong>暂存区</strong>。</p><blockquote><p>丢弃<strong>工作区</strong>的修改只需要执行一下命令：</p><figure class="highlight shell"><table><tr><td class="gutter"><pre><span class="line">1</span><br></pre></td><td class="code"><pre><span class="line"><span class="meta">></span><span class="bash">git checkout -- <file> <span class="comment"># 使用 git restore <file> 的效果一样</span></span></span><br></pre></td></tr></table></figure><p>命令<code>git checkout -- <file></code>会将<strong>工作区</strong>的修改撤回到最后一次<code>git add</code>或<code>git commit</code>时的状态。有两种情况，即：</p><ul><li>一种是<code>file</code>自修改后还没有被放到<strong>暂存区</strong>，现在，撤销修改就回到和<strong>版本库</strong>一模一样的状态；</li><li>另一种是<code>file</code>已经添加到<strong>暂存区</strong>后，又作了修改，现在，撤销修改就回到添加到<strong>暂存区</strong>后的状态。</li></ul></blockquote></li></ol><h2 id="二、文件删除"><a href="#二、文件删除" class="headerlink" title="二、文件删除"></a>二、文件删除</h2><p> 文件删除其实也是一个修改动作。当使用<code>rm</code>命令或者通过鼠标右击删除文件时，<strong>工作区</strong>就产生了修改。这时候有两种选择：</p><p> 1.确实要从<strong>版本库</strong>中删除该文件，使用命令<code>git rm <file></code>然后使用<code>git commit</code>进行提交。==<strong>PS</strong>==：<strong>工作区</strong>删除文件后，然后使用<code>git add <file></code>的效果和直接使用<code>git rm <file></code>的效果是一样的。<br> 2. 另一种情况是删除错了，这时候只要使用<code>git checkout -- <file></code>即可把<strong>误删的文件恢复到最新版本，最后一次提交后修改的内容会丢失</strong>。==<strong>PS：从来没有被添加到版本库就被删除的文件，是无法恢复的！</strong>==</p><div class="declare"><ul class="post-copyright"><li><strong>本文作者：</strong> 路痴的兔子</li><li><strong>本文链接：</strong> <a href="https:/proudrabbit.gitee.io/Git撤销修改.html" 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n)return t.insertAdjacentHTML("afterend",n);var r=t.nextSibling;return r?t.parentNode.insertBefore(n,r):t.parentNode.appendChild(n)}}])</script><script src="/./main.b8fa34.js"></script><script>!function(){var e=document.createElement("script");document.getElementsByTagName("body")[0].appendChild(e),e.setAttribute("src","/slider.b6a41a.js")}()</script><div class="tools-col" q-class="show:isShow,hide:isShow|isFalse" q-on="click:stop(e)"><div class="tools-nav header-menu"><ul style="width:70%"><li style="width:33.333333333333336%" q-on="click: openSlider(e, 'innerArchive')"><a href="javascript:void(0)" q-class="active:innerArchive">所有文章</a></li><li style="width:33.333333333333336%" q-on="click: openSlider(e, 'friends')"><a href="javascript:void(0)" q-class="active:friends">友情链接</a></li><li style="width:33.333333333333336%" q-on="click: openSlider(e, 'aboutme')"><a href="javascript:void(0)" q-class="active:aboutme">关于我</a></li></ul></div><div class="tools-wrap"><section 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jsonContent:
meta: false
pages: false
posts:
title: true
date: true
path: true
text: false
raw: false
content: false
slug: false
updated: false
comments: false
link: false
permalink: false
excerpt: false
categories: false
tags: true
</pre></p><li class="search-li" q-repeat="items" q-show="isShow"><a q-attr="href:path|urlformat" class="search-title"><i class="icon-quo-left icon"></i><span q-text="title"></span></a><p class="search-time"><i class="icon-calendar icon"></i> <span q-text="date|dateformat"></span></p><p class="search-tag"><i class="icon-price-tags icon"></i> <span q-repeat="tags" q-on="click:choseTag(e, name)" q-text="name|tagformat"></span></p></li></ul></section><section class="tools-section tools-section-friends" q-show="friends"><ul class="search-ul"><li class="search-li"><a href="https://blog.csdn.net/qq_37000789" target="_blank" class="search-title" title="个人博客"><i class="icon-link icon"></i> 正月点灯笼的博客</a></li><li class="search-li"><a href="https://blog.csdn.net/ld1461575230?spm=1001.2101.3001.5343&type=blog" target="_blank" class="search-title" title="个人博客"><i class="icon-link icon"></i> 哈哈哈的嘎嘎嘎的博客</a></li><li class="search-li"><a href="https://gujiakai.gitee.io/" target="_blank" class="search-title" title="个人博客"><i class="icon-link icon"></i> 摸鱼的小灰栗的博客</a></li></ul></section><section class="tools-section tools-section-me" q-show="aboutme"><div class="aboutme-wrap" id="aboutme">熟悉的技术：<br>C/C++、Python、嵌入式、ROS。<br>开源爱好者、Linux爱好者。<br>欢迎访问我的博客。hi✿(。◕ᴗ◕。)✿</div></section></div></div><div class="pswp" tabindex="-1" role="dialog" aria-hidden="true"><div class="pswp__bg"></div><div class="pswp__scroll-wrap"><div class="pswp__container"><div class="pswp__item"></div><div class="pswp__item"></div><div class="pswp__item"></div></div><div class="pswp__ui pswp__ui--hidden"><div class="pswp__top-bar"><div class="pswp__counter"></div><button class="pswp__button pswp__button--close" title="Close (Esc)"></button> <button class="pswp__button pswp__button--share" style="display:none" title="Share"></button> <button class="pswp__button pswp__button--fs" title="Toggle fullscreen"></button> <button class="pswp__button pswp__button--zoom" title="Zoom in/out"></button><div class="pswp__preloader"><div class="pswp__preloader__icn"><div class="pswp__preloader__cut"><div class="pswp__preloader__donut"></div></div></div></div></div><div class="pswp__share-modal pswp__share-modal--hidden pswp__single-tap"><div class="pswp__share-tooltip"></div></div><button class="pswp__button pswp__button--arrow--left" title="Previous (arrow left)"></button> <button class="pswp__button pswp__button--arrow--right" title="Next (arrow right)"></button><div class="pswp__caption"><div class="pswp__caption__center"></div></div></div></div></div></div><script type="text/javascript" src="/plugins/TweenMax/TweenMax.min.js"></script><script type="text/javascript" src="/plugins/TweenMax/HoverImg.js"></script><script>var hoverEffect = {
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