在 Web 项目中应用 Apache Shiro

 public class MyShiroRealm extends AuthorizingRealm{ 
   
   // 用于获取用户信息及用户权限信息的业务接口
   private BusinessManager businessManager; 
    
   // 获取授权信息
   protected AuthorizationInfo doGetAuthorizationInfo( 
      PrincipalCollection principals) { 
      String username = (String) principals.fromRealm( 
         getName()).iterator().next(); 
      
      if( username != null ){ 
      // 查询用户授权信息
         Collection<String> pers=businessManager.queryPermissions(username); 
         if( pers != null && !pers.isEmpty() ){ 
            SimpleAuthorizationInfo info = new SimpleAuthorizationInfo(); 
            for( String each:pers ) 
               info.addStringPermissions( each ); 
            
            return info; 
         } 
      } 
      
      return null; 
   } 
   
   // 获取认证信息
   protected AuthenticationInfo doGetAuthenticationInfo( 
      AuthenticationToken authcToken ) throws AuthenticationException { 
      UsernamePasswordToken token = (UsernamePasswordToken) authcToken; 
      // 通过表单接收的用户名
      String username = token.getUsername(); 
      
      if( username != null && !"".equals(username) ){ 
         LoginAccount account = businessManager.get( username ); 
         
         if( account != null ){ 
            return new SimpleAuthenticationInfo( 
               account.getLoginName(),account.getPassword(),getName() ); 
         } 
      } 
      
      return null; 
   } 
 }

 <filter> 
   <filter-name>shiroFilter</filter-name> 
   <filter-class> 
      org.springframework.web.filter.DelegatingFilterProxy 
   </filter-class> 
 </filter> 
 <filter-mapping> 
   <filter-name>shiroFilter</filter-name> 
   <url-pattern>/*</url-pattern> 
 </filter-mapping>

 <bean id="shiroFilter" class="org.apache.shiro.spring.web.ShiroFilterFactoryBean"> 
   <property name="securityManager" ref="securityManager"/> 
   <property name="loginUrl" value="/login.do"/> 
   <property name="successUrl" value="/welcome.do"/> 
   <property name="unauthorizedUrl" value="/403.do"/> 
   <property name="filters"> 
      <util:map> 
         <entry key="authc" value-ref="formAuthenticationFilter"/> 
      </util:map> 
   </property> 
   <property name="filterChainDefinitions"> 
      <value> 
         /=anon 
         /login.do*=authc 
         /logout.do*=anon 
         
         # 权限配置示例
         /security/account/view.do=authc,perms[SECURITY_ACCOUNT_VIEW] 
         
         /** = authc 
      </value> 
   </property> 
 </bean> 

 <bean id="securityManager" 
   class="org.apache.shiro.web.mgt.DefaultWebSecurityManager"> 
   <property name="realm" ref="myShiroRealm"/> 
 </bean> 

 <bean id="myShiroRealm" class="xxx.packagename.MyShiroRealm"> 
   <!-- businessManager 用来实现用户名密码的查询 --> 
   <property name="businessManager" ref="businessManager"/> 
   <property name="cacheManager" ref="shiroCacheManager"/> 
 </bean> 

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

 <bean id="shiroCacheManager" 
   class="org.apache.shiro.cache.ehcache.EhCacheManager"> 
   <property name="cacheManager" ref="cacheManager"/> 
 </bean> 

 <bean id="formAuthenticationFilter" 
   class="org.apache.shiro.web.filter.authc.FormAuthenticationFilter"/>

 <!-- captcha servlet--> 
 <servlet> 
   <servlet-name>kaptcha</servlet-name> 
   <servlet-class> 
      com.google.code.kaptcha.servlet.KaptchaServlet 
   </servlet-class> 
 </servlet> 
 <servlet-mapping> 
 <servlet-name>kaptcha</servlet-name> 
 <url-pattern>/images/kaptcha.jpg</url-pattern> 
 </servlet-mapping>

 public class CaptchaUsernamePasswordToken extends UsernamePasswordToken{ 

 private String captcha; 

 // 省略 getter 和 setter 方法

 public CaptchaUsernamePasswordToken(String username, char[] password, 
 boolean rememberMe, String host,String captcha) { 
 super(username, password, rememberMe, host); 
 this.captcha = captcha; 
 } 
 }

 public class CaptchaFormAuthenticationFilter extends FormAuthenticationFilter{ 

   public static final String DEFAULT_CAPTCHA_PARAM = "captcha"; 
   
   private String captchaParam = DEFAULT_CAPTCHA_PARAM; 
   
   public String getCaptchaParam() { 
      return captchaParam; 
   } 
   
   public void setCaptchaParam(String captchaParam) { 
      this.captchaParam = captchaParam; 
   } 
   
   protected String getCaptcha(ServletRequest request) { 
      return WebUtils.getCleanParam(request, getCaptchaParam()); 
   } 
   
   // 创建 Token 
   protected CaptchaUsernamePasswordToken createToken( 
      ServletRequest request, ServletResponse response) { 
   
      String username = getUsername(request); 
      String password = getPassword(request); 
      String captcha = getCaptcha(request); 
      boolean rememberMe = isRememberMe(request); 
      String host = getHost(request); 
                   
      return new CaptchaUsernamePasswordToken( 
         username, password, rememberMe, host,captcha); 
   } 
   
   // 验证码校验
   protected void doCaptchaValidate( HttpServletRequest request 
      ,CaptchaUsernamePasswordToken token ){ 

      String captcha = (String)request.getSession().getAttribute( 
         com.google.code.kaptcha.Constants.KAPTCHA_SESSION_KEY); 
      
      if( captcha!=null && 
         !captcha.equalsIgnoreCase(token.getCaptcha()) ){ 
         throw new IncorrectCaptchaException ("验证码错误！"); 
      } 
   } 
    
   // 认证
   protected boolean executeLogin(ServletRequest request, 
      ServletResponse response) throws Exception { 
      CaptchaUsernamePasswordToken token = createToken(request, response); 
       
      try { 
         doCaptchaValidate( (HttpServletRequest)request,token ); 
                 
         Subject subject = getSubject(request, response); 
         subject.login(token); 
                     
         return onLoginSuccess(token, subject, request, response); 
      } catch (AuthenticationException e) { 
         return onLoginFailure(token, e, request, response); 
      } 
   } 

 }

 public class IncorrectCaptchaException extends AuthenticationException{ 
   
   public IncorrectCaptchaException() { 
      super(); 
   } 
   
   public IncorrectCaptchaException(String message, Throwable cause) { 
      super(message, cause); 
   } 
   
   public IncorrectCaptchaException(String message) { 
      super(message); 
   } 
   
   public IncorrectCaptchaException(Throwable cause) { 
      super(cause); 
   } 
 }

 Object obj=request.getAttribute( 
   org.apache.shiro.web.filter.authc.FormAuthenticationFilter 
      .DEFAULT_ERROR_KEY_ATTRIBUTE_NAME); 
 AuthenticationException authExp = (AuthenticationException)obj; 
 if( authExp != null ){ 
   String expMsg=""; 
   
   if(authExp instanceof UnknownAccountException || 
      authExp instanceof IncorrectCredentialsException){ 
      expMsg="错误的用户账号或密码！"; 
   }else if( authExp instanceof IncorrectCaptchaException){ 
      expMsg="验证码错误！"; 
   }else{ 
      expMsg="登录异常 :"+authExp.getMessage() ; 
   } 
    
   out.print("<div class=\"error\">"+expMsg+"</div>"); 
 }

 public class MyCasRealm extends CasRealm{ 
   
   // 获取授权信息
   protected AuthorizationInfo doGetAuthorizationInfo( 
      PrincipalCollection principals) { 
      //... 与前面 MyShiroRealm 相同
   } 
   
    public String getCasServerUrlPrefix() { 
      return "http://casserver/login"; 
   } 
   
   public String getCasService() { 
      return "http://casclient/shiro-cas"; 
   } 
   16 
 }

 <bean id="shiroFilter" 
   class="org.apache.shiro.spring.web.ShiroFilterFactoryBean"> 
   <property name="securityManager" ref="securityManager"/> 
   <property name="loginUrl" 
      value="http://casserver/login?service=http://casclient/shiro-cas"/> 
   <property name="successUrl" value="/welcome.do"/> 
   <property name="unauthorizedUrl" value="/403.do"/> 
   <property name="filters"> 
      <util:map> 
         <entry key="authc" value-ref="formAuthenticationFilter"/> 
         <entry key="cas" value-ref="casFilter"/> 
      </util:map> 
   </property> 
   <property name="filterChainDefinitions"> 
      <value> 
         /shiro-cas*=cas 
         /logout.do*=anon 
         /casticketerror.do*=anon 
          
         # 权限配置示例
         /security/account/view.do=authc,perms[SECURITY_ACCOUNT_VIEW] 
          
         /** = authc 
      </value> 
   </property> 
 </bean> 
 
 <bean id="securityManager" 
   class="org.apache.shiro.web.mgt.DefaultWebSecurityManager"> 
   <property name="realm" ref="myShiroRealm"/> 
 </bean> 

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

 <!-- CAS Realm --> 
 <bean id="myShiroRealm" class="xxx.packagename.MyCasRealm"> 
   <property name="cacheManager" ref="shiroCacheManager"/> 
 </bean> 

 <bean id="shiroCacheManager" 
   class="org.apache.shiro.cache.ehcache.EhCacheManager"> 
   <property name="cacheManager" ref="cacheManager"/> 
 </bean> 

 <bean id="formAuthenticationFilter" 
   class="org.apache.shiro.web.filter.authc.FormAuthenticationFilter"/> 

 <!-- CAS Filter --> 
 <bean id="casFilter" class="org.apache.shiro.cas.CasFilter"> 
   <property name="failureUrl" value="casticketerror.do"/> 
 </bean>