shiro 退出 清除緩存

shiro是一個被廣泛使用的安全層框架，通過xml配置方式與spring無縫對接，用戶的登陸/退出/權限控制/Cookie等管理系統基礎功能交給shiro來管理。

　　一般，在JavaWEB管理平台系統時，用戶退出系統之前沒需要清除用戶數據和關閉連接，防止垃圾數據堆積，shiro提供了LogoutFilter過濾器，我們可以通過LogoutFilter的preHandle方法，實現清除緩存功能。

頁面代碼：

<div class="item" style="float:right;cursor:pointer;">
     <@shiro.guest>
          <a href="${base}/u/zhuti/ztzx"><span style="font-weight:bold">登錄</span>&nbsp;&nbsp;&nbsp;&nbsp;|</a>
     </@shiro.guest>
     <@shiro.user>
          <a href="${base}/b/logout">退出</a>
     </@shiro.user>
</div>

shiro配置文件：applicationContext-shiro.xml

先貼出整個配置文件：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:tx="http://www.springframework.org/schema/tx" xmlns:context="http://www.springframework.org/schema/context"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="http://www.springframework.org/schema/beans 
                            http://www.springframework.org/schema/beans/spring-beans-4.0.xsd 
                            http://www.springframework.org/schema/jee 
                            http://www.springframework.org/schema/jee/spring-jee-4.0.xsd 
                            http://www.springframework.org/schema/context 
                            http://www.springframework.org/schema/context/spring-context-4.0.xsd
                            http://www.springframework.org/schema/aop
                            http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
                            http://www.springframework.org/schema/tx
                            http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">


    <bean id="shiroCacheManager" class="org.apache.shiro.cache.ehcache.EhCacheManager">
        <property name="cacheManagerConfigFile" value="classpath:ehcache-shiro.xml" />
    </bean>

    <!-- <bean id="myRealm" class="cn.com.zhulong.app.security.shiro.MyRealm" /> -->
    
    <!-- <bean id="casRealm" class="org.apache.shiro.cas.CasRealm">  -->
    <bean id="casRealm" class="cn.com.zhulong.app.security.shiro.MyCasRealm">   
    </bean>

    <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
        <!-- <property name="sessionMode" value="native"/> -->
        <property name="realm" ref="casRealm" />
        <property name="cacheManager" ref="shiroCacheManager" />
        <property name="sessionManager" ref="sessionManager"/>
        <property name="subjectFactory" ref="casSubjectFactory" />
    </bean>
    
    <!-- 如果要實現cas的remember me的功能，需要用到下面這個bean，並設置到securityManager的subjectFactory中 -->  
    <bean id="casSubjectFactory" class="org.apache.shiro.cas.CasSubjectFactory"/>
    
    <!-- 單點登錄配置 -->
    <!-- <bean id="casFilter" class="org.apache.shiro.cas.CasFilter"> -->
    <bean id="casFilter" class="cn.com.zhulong.app.security.shiro.CasFilter">
        <!--配置驗證錯誤時的失敗頁面（Ticket 校驗不通過時展示的錯誤頁面） -->
        <property name="failureUrl" value="/error" />
    </bean>

    <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
    <!-- <bean id="shiroFilter" class="cn.com.zhulong.app.security.shiro.MyShiroFilterFactoryBean"> -->
        <property name="securityManager" ref="securityManager" />
        
        <!--沒有單點登錄下的配置：沒有權限或者失敗后跳轉的頁面 -->
        <property name="loginUrl" value="/login" />
        <!--有單點登錄的配置：登錄 CAS 服務端地址，參數 service 為服務端的返回地址 --> 
        <!-- <property name="loginUrl" value="${cas.shiro.loginUrl}" /> -->
        
        <property name="successUrl" value="/" />
        
        <property name="unauthorizedUrl" value="/unauthorized" />
        <property name="filters">
            <map>
                <entry key="casFilter" value-ref="casFilter"></entry>
                <entry key="myperms">
                    <bean class="cn.com.zhulong.common.web.shiro.MyPermissionsAuthorizationFilter">
                    </bean>
                </entry>
                <entry key="touSuAuthc">
                    <bean class="cn.com.zhulong.app.security.shiro.TouSuFormAuthenticationFilter">
                    </bean>
                </entry>
                <!--退出過濾器-->
                <entry key="logout" value-ref="logoutFilter" />
            </map>
        </property>
        <!-- 先注釋掉，先不要權限判斷，只要登陸驗證就可以訪問，測試方便 <property name="filterChainDefinitions">
            <value>
                /logout=logoutFilter
                /enum_js=anon
                /admin/**=authc,myperms
                /admin/**=authc
                /admin/** = authc
                
                /jyzk/toZycdAdd**  = authc
                /jyzk/zycdAdd**  = authc
            </value>
        </property> -->
        <property name="filterChainDefinitions">
            <value>
                /authentication* = casFilter
                /res/** = anon
                /enum_js = anon
                 /b/logout = logout
                /admin/** = authc
                /u/zbxmts/** = touSuAuthc
                /u/** = authc
                /open/**  = authc
                /jyzk/toZycdAdd**  = authc
                /jyzk/zycdAdd**  = authc
            </value>
        </property>
    </bean>


    <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor" />

    <!-- 會話ID生成器 -->
    <bean id="sessionIdGenerator" class="org.apache.shiro.session.mgt.eis.JavaUuidSessionIdGenerator" />
    
    <bean id="logoutFilter" class="org.apache.shiro.web.filter.authc.LogoutFilter">
        <property name="redirectUrl" value="/login" />
    </bean>
    
    <bean class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
        <property name="staticMethod"
            value="org.apache.shiro.SecurityUtils.setSecurityManager" />
        <property name="arguments" ref="securityManager" />
    </bean>
    
    <bean id="sessionManager" class="org.apache.shiro.web.session.mgt.DefaultWebSessionManager">
        <property name="globalSessionTimeout" value="1800000" />
        <property name="deleteInvalidSessions" value="true" />
        <property name="sessionValidationSchedulerEnabled" value="true" />
        <property name="sessionValidationScheduler" ref="sessionValidationScheduler" />
        <property name="sessionDAO" ref="sessionDAO" />
        <property name="sessionIdCookieEnabled" value="true" />
        <!-- <property name="sessionIdCookie.path" value="/365-mfgg-adminweb/" /> -->
    </bean>

    <!-- 會話驗證調度器 -->
    <bean id="sessionValidationScheduler"
        class="org.apache.shiro.session.mgt.ExecutorServiceSessionValidationScheduler">
        <!-- 30分鍾 單位為毫秒 -->
        <property name="interval" value="1800000" />
        <property name="sessionManager" ref="sessionManager" />
    </bean>


    <bean id="sessionDAO" class="cn.com.zhulong.common.web.shiro.dao.CustomShiroSessionDAO">
        <property name="shiroSessionRepository" ref="memcachedShiroSessionRepository" />
    </bean>

    <bean id="memcachedShiroSessionRepository" class="cn.com.zhulong.common.web.shiro.dao.MemcachedShiroSessionRepository" />
    
</beans>  

首先頁面點擊退出時：攔截/b/logout找到對應logout

<property name="filterChainDefinitions">
            <value>
                /authentication* = casFilter
                /res/** = anon
                /enum_js = anon
                 /b/logout = logout
                /admin/** = authc
                /u/zbxmts/** = touSuAuthc
                /u/** = authc
                /open/**  = authc
                /jyzk/toZycdAdd**  = authc
                /jyzk/zycdAdd**  = authc
            </value>
        </property>

再根據logout找到對應退出過濾器：

        <property name="filters">
            <map>
                <entry key="casFilter" value-ref="casFilter"></entry>
                <entry key="myperms">
                    <bean class="cn.com.zhulong.common.web.shiro.MyPermissionsAuthorizationFilter">
                    </bean>
                </entry>
                <entry key="touSuAuthc">
                    <bean class="cn.com.zhulong.app.security.shiro.TouSuFormAuthenticationFilter">
                    </bean>
                </entry>
                <!--退出過濾器-->
                <entry key="logout" value-ref="logoutFilter" />
            </map>
        </property>

再根據logoutFilter找到此配置

    <bean id="logoutFilter" class="org.apache.shiro.web.filter.authc.LogoutFilter">
        <property name="redirectUrl" value="/login" />
    </bean>

此處先執行LogoutFilter的退出清空緩存操作，然后重定向，value為重定向的地址