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Apache Shiro简介.html
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Apache Shiro简介.html
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class="posts-expand"><article class="post post-type-normal" itemscope itemtype="http://schema.org/Article"><link itemprop="mainEntityOfPage" href="http://mrbird.cc/Apache Shiro简介.html"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="name" content="MrBird"><meta itemprop="description" content=""><meta itemprop="image" content="/images/blogImage.jpg"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="MrBird"></span><header class="post-header"><h2 class="post-title" itemprop="name headline">Apache Shiro简介</h2><div class="post-meta"><span class="post-time"><span class="post-meta-item-icon"><i class="fa fa-calendar-o"></i> </span><span class="post-meta-item-text"></span> <time title="创建于" itemprop="dateCreated datePublished" datetime="2017-12-16T19:00:52+08:00">2017-12-16 </time></span><span></span> <span class="post-meta-divider">|</span> <span class="page-pv"><i class="fa fa-laptop"></i> Visit count <span class="busuanzi-value" id="busuanzi_value_page_pv"></span></span></div></header><div class="post-body" itemprop="articleBody"><p><a href="http://shiro.apache.org/" target="_blank" rel="noopener">Apache Shiro</a>（发音为<code>shee-roh</code>，日语堡垒（Castle）的意思）是一个强大易用的Java安全框架，提供了认证、授权、加密和会话管理功能，可为任何应用提供安全保障 - 从命令行应用、移动应用到大型网络及企业应用。相较于Spring Security来说较为简单，易于上手。</p><p>Apache Shiro有三个核心的概念Subject，SecurityManager和Realms，如下图所示：<a id="more"></a></p><p><img src="img/sdfjasdr3857312-323412.png" alt="sdfjasdr3857312-323412.png"></p><p><strong>1、</strong><a href="http://shiro.apache.org/static/1.3.2/apidocs/org/apache/shiro/subject/Subject.html" target="_blank" rel="noopener">Subject</a>：主体，代表了当前“用户”，这个用户不一定是一个具体的人，与当前应用交互的任何东西都是Subject，如网络爬虫，机器人等，即一个抽象概念。所有Subject 都绑定到SecurityManager，与Subject的所有交互都会委托给SecurityManager。可以把Subject认为是一个门面，SecurityManager才是实际的执行者。</p><p>在shiro中通过<code>org.apache.shiro.SecurityUtils</code>类来获取Subject对象：</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></pre></td><td class="code"><pre><span class="line"><span class="keyword">import</span> org.apache.shiro.subject.Subject;</span><br><span class="line"><span class="keyword">import</span> org.apache.shiro.SecurityUtils;</span><br><span class="line">...</span><br><span class="line">Subject currentUser = SecurityUtils.getSubject();</span><br></pre></td></tr></table></figure><p></p><p>更多关于Subject的信息可访问<a href="http://shiro.apache.org/static/1.3.2/apidocs/org/apache/shiro/subject/Subject.html" target="_blank" rel="noopener">http://shiro.apache.org/static/1.3.2/apidocs/org/apache/shiro/subject/Subject.html</a></p><p><strong>2、</strong><a href="http://shiro.apache.org/static/1.3.2/apidocs/org/apache/shiro/mgt/SecurityManager.html" target="_blank" rel="noopener">SecurityManager</a>：安全管理器，即所有与安全有关的操作都会与SecurityManager交互，且它管理着所有Subject，可以看出它是Shiro的核心。它负责与后边介绍的其他组件进行 交互，类似于Spring MVC中的DispatcherServlet前端控制器。</p><p><strong>3、</strong><a href="http://shiro.apache.org/static/1.3.2/apidocs/org/apache/shiro/realm/Realm.html" target="_blank" rel="noopener">Realm</a>：域，Shiro从Realm获取安全数据（如用户、角色、权限），就是说SecurityManager要验证用户身份，那么它需要从Realm获取相应的用户进行比较以确定用户身份是否合法。 也需要从Realm得到用户相应的角色/权限进行验证用户是否能进行操作。</p><p>简而言之，创建一个基本的Shiro应用过程为：</p><ul><li><p>应用代码通过Subject来进行认证和授权，而Subject又委托给SecurityManager；</p></li><li><p>我们需要给Shiro的SecurityManager注入Realm，从而让SecurityManager能得到合法的用户及其权限进行判断。</p></li></ul><div class="note danger"><p>Shiro并没有为我们提供Realm的实现，需要我们手动编写实现。基本过程为继承<code>org.apache.shiro.realm.AuthorizingRealm</code>抽象类，实现doGetAuthorizationInfo和doGetAuthenticationInfo方法。</p></div><p>了解了Shiro的核心组件后，接下来看看Shiro为我们带来了哪些功能模块：</p><p><img src="img/ShiroFeatures.png" alt="ShiroFeatures.png"></p><p>Shiro提供了四大基本安全功能：认证，授权，会话管理和加密。</p><ul><li><p><strong>身份验证(Authentication)</strong>：也称为登录验证，即验证用户名和密码是否正确；</p></li><li><p><strong>授权(Authorization)</strong>：根据用户的角色和权限来控制用户可访问的资源；</p></li><li><p><strong>会话管理(Session Management)</strong>：即使在非Web或EJB应用程序中，也可以管理用户特定的SESSION会话；</p></li><li><p><strong>密码学(Cryptography)</strong>：使用加密算法保证数据安全，同时易于使用。</p></li></ul><p>除此之外，Shiro也支持以下特性：</p><ul><li><p><strong>Web支持(Web Support)</strong>：Shiro提供的web程序API可以帮助轻松保护Web应用程序；</p></li><li><p><strong>缓存(Caching)</strong>：缓存可确保安全验证操作保持快速高效；</p></li><li><p><strong>并发性(Concurrency)</strong>：Apache Shiro支持具有并发功能的多线程应用程序；</p></li><li><p><strong>测试(Testing)</strong>：测试API帮助您编写单元测试和集成测试；</p></li><li><p><strong>运行方式(Run As)</strong>：允许用户以别的用户身份（如果允许）登录；</p></li><li><p><strong>记住我(Remember Me)</strong>：在会话中记住用户的身份，只有在强制登录时才需要登录。</p></li></ul><blockquote><p>参考自:</p></blockquote><blockquote><p><a href="http://shiro.apache.org/introduction.html" target="_blank" rel="noopener">http://shiro.apache.org/introduction.html</a></p></blockquote><blockquote><p><a href="http://www.infoq.com/cn/articles/apache-shiro" target="_blank" rel="noopener">http://www.infoq.com/cn/articles/apache-shiro</a></p></blockquote><script>$(".post-body a").not(".thispage").addClass("ignore-href").attr("target","_blank")</script></div><div></div><div><div style="padding:10px 0;margin:20px auto;width:90%;text-align:center;color:#878787" id="reward-div"><div>请作者喝瓶肥宅水🥤</div><button id="rewardButton" style="margin-top:10px" disable="enable" onclick='var e=document.getElementById("QR");"none"===e.style.display?e.style.display="block":e.style.display="none"'><span style="height:46px;width:46px;line-height:46px;border-radius:50%;color:#fe5f55;font-weight:600;background:#ffd5be;border:none;box-shadow:0 4px 8px 0 rgba(255,213,190,.4)">￥</span></button><div id="QR" style="display:none"><div id="wechat" style="display:inline-block"><img id="wechat_qr" src="/img/wechat_pay.png" 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