spring + shiro + cas 实现sso单点登录的示例代码

<!-- 设置密码的加密方式，这里使用的是MD5加密 -->
  <bean id="passwordEncoder"
   class="org.jasig.cas.authentication.handler.DefaultPasswordEncoder"
   c:encodingAlgorithm="MD5"
   p:characterEncoding="UTF-8" />

 <!-- 通过数据库验证身份，这个得自己去实现 -->
  <bean id="primaryAuthenticationHandler"
   class="com.distinct.cas.jdbc.QueryDatabaseAuthenticationHandler"
   p:dataSource-ref="dataSource"
   p:passwordEncoder-ref="passwordEncoder"
   p:sql="select password from t_user where account=? and status = 'active'" />
   
 <!-- 设置数据源 -->
   <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
     <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>
     <property name="url" value="jdbc:mysql://127.0.0.1:3306/db_test?useUnicode=true&amp;characterEncoding=utf8"></property>
     <property name="username" value="root"></property>
     <property name="password" value="123456"></property> 
 </bean>

``` properties
shiro.loginUrl=http://127.0.0.1:8080/cas/login?service=http://127.0.0.1:8081/node1/shiro-cas

shiro.logoutUrl=http://127.0.0.1:8080/cas/logout?service=http://127.0.0.1:8081/node1/shiro-cas

shiro.cas.serverUrlPrefix=http://127.0.0.1:8080/cas

shiro.cas.service=http://127.0.0.1:8081/node1/shiro-cas

shiro.failureUrl=/users/loginSuccess

shiro.successUrl=/users/loginSuccess

```

<!-- Shiro Filter -->
  <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean">
    <property name="securityManager" ref="securityManager" />
    <!-- 设定用户的登录链接，这里为cas登录页面的链接地址可配置回调地址 -->
    <property name="loginUrl" value="${shiro.loginUrl}" />
    <property name="filters">
      <map>
        <!-- 添加casFilter到shiroFilter -->
        <entry key="casFilter" value-ref="casFilter" />
        <entry key="logoutFilter" value-ref="logoutFilter" />
      </map>
    </property>
    <property name="filterChainDefinitions">
      <value>
        /shiro-cas = casFilter
        /logout = logoutFilter
        /users/** = user
      </value>
    </property>
  </bean>

  <bean id="casFilter" class="org.apache.shiro.cas.CasFilter">
    <!-- 配置验证错误时的失败页面 -->
    <property name="failureUrl" value="${shiro.failureUrl}" />
    <property name="successUrl" value="${shiro.successUrl}" />
  </bean>

  <bean id="logoutFilter" class="org.apache.shiro.web.filter.authc.LogoutFilter">
    <!-- 配置验证错误时的失败页面 -->
    <property name="redirectUrl" value="${shiro.logoutUrl}" />
  </bean>

  <bean id="casRealm" class="com.spring.mybatis.realm.UserRealm">
    <!-- 认证通过后的默认角色 -->
    <property name="defaultRoles" value="ROLE_USER" />
    <!-- cas服务端地址前缀 -->
    <property name="casServerUrlPrefix" value="${shiro.cas.serverUrlPrefix}" />
    <!-- 应用服务地址，用来接收cas服务端票据 -->
    <property name="casService" value="${shiro.cas.service}" />
  </bean>

  <!-- Shiro's main business-tier object for web-enabled applications -->
  <bean id="securityManager" class="org.apache.shiro.web.mgt.DefaultWebSecurityManager">
    <property name="subjectFactory" ref="casSubjectFactory"></property>
    <property name="realm" ref="casRealm" />
  </bean>

  <bean id="casSubjectFactory" class="org.apache.shiro.cas.CasSubjectFactory"></bean>

  <bean
    class="org.apache.shiro.spring.security.interceptor.AuthorizationAttributeSourceAdvisor">
    <property name="securityManager" ref="securityManager" />
  </bean>

  <bean id="lifecycleBeanPostProcessor" class="org.apache.shiro.spring.LifecycleBeanPostProcessor"></bean>
  <bean
    class="org.springframework.beans.factory.config.MethodInvokingFactoryBean">
    <property name="staticMethod"
      value="org.apache.shiro.SecurityUtils.setSecurityManager"></property>
    <property name="arguments" ref="securityManager"></property>
  </bean>

<filter>
    <filter-name>shiroFilter</filter-name>
    <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    <init-param>
      <param-name>targetFilterLifecycle</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>shiroFilter</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>

<plugin>
    <groupId>org.apache.tomcat.maven</groupId>
    <artifactId>tomcat7-maven-plugin</artifactId>
    <version>2.1</version>
    <configuration>
      <port>8081</port>
      <uriEncoding>UTF-8</uriEncoding>
      <server>tomcat7</server>
      <path>/node1</path>
    </configuration>
  </plugin>