Struts2 自定义拦截器 二则

异常拦截器:

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> --> package  org.roadway.lm.util;

import  org.apache.log4j.Logger;

import  com.opensymphony.xwork2.ActionInvocation;
import  com.opensymphony.xwork2.interceptor.AbstractInterceptor;

/**
 *  @author  Huyvanpull
 * 
  */
@SuppressWarnings( " serial " )
public   class  ExceptionInterceptor  extends  AbstractInterceptor
{
     private  Logger logger  =  Logger.getLogger(ExceptionInterceptor. class );
    
     private  String interceptorName;
    
    @Override
     public  String intercept(ActionInvocation invocation)  throws  Exception
    {
         this .logger.debug( " 进入 "   +   this .getInterceptorName());
        String result  =   null ;
         try
        {
            result  =  invocation.invoke();
        }
         catch  (Exception exception)
        {
             this .logger.error( this .getExceptionInfo(exception));
             throw  exception;
        }
         return  result;
    }
    
     private  String getExceptionInfo(Exception exception)
    {
        StringBuffer bExceptionInfo  =   new  StringBuffer();
        bExceptionInfo.append(exception.toString());
        bExceptionInfo.append( " \n\t " );
        
        StackTraceElement[] stackTraceElements  =  exception.getStackTrace();
         for  ( int  i  =   0 ; i  <  stackTraceElements.length; i ++ )
        {
            bExceptionInfo.append( " [ "   +   this .getInterceptorName()  +   " ]  "
                     +  stackTraceElements[i].toString()  +   " \n\t " );
        }
         return  bExceptionInfo.toString();
    }
    
     public  String getInterceptorName()
    {
         return  interceptorName;
    }
    
     public   void  setInterceptorName(String interceptorName)
    {
         this .interceptorName  =  interceptorName;
    }
    
}

登陆检查拦截器:

<!--<br /> <br /> Code highlighting produced by Actipro CodeHighlighter (freeware)<br /> http://www.CodeHighlighter.com/<br /> <br /> --> package  org.roadway.lm.util;

import  java.util.Map;

import  org.apache.log4j.Logger;
import  org.roadway.lm.po.UserInfo;
import  org.roadway.lm.user.action.UserInfoAction;

import  com.opensymphony.xwork2.Action;
import  com.opensymphony.xwork2.ActionInvocation;
import  com.opensymphony.xwork2.interceptor.AbstractInterceptor;

/**
 *  @author  tom_hui
 * 
  */
@SuppressWarnings( " serial " )
public   class  LoginCheckerInterceptor  extends  AbstractInterceptor
{
     private  String userSessionKey  =   " userInfo " ;
    
     private  String isCheckLogin    =   " true " ;
    
     private  Logger logger          =  Logger
                                          .getLogger(LoginCheckerInterceptor. class );
    
    @SuppressWarnings( " unchecked " )
     public  String intercept(ActionInvocation actionInvocation)  throws  Exception
    {
        Object action  =  actionInvocation.getAction();
        
         /**  如果设置拦截器不检查登陆  */
         if  ( " false " .equalsIgnoreCase(isCheckLogin))
        {
            actionInvocation.invoke();
        }
         /**  如果是登陆Action,放其通行  */
         if  (action  instanceof  UserInfoAction)
        {
             this .logger.info( " 登陆Action: "   +  UserInfoAction. class .getName());
             return  actionInvocation.invoke();
        }
        
         /**  从session中得到UserInfo的信息  */
        Map session  =  actionInvocation.getInvocationContext().getSession();
        UserInfo userInfo  =  (UserInfo) session.get(userSessionKey);
        
         /**  如果Session中存在UserInfo对象  */
         if  (userInfo  !=   null )
        {
             this .logger.info( " 用户 "   +  userInfo.getUserName()  +   " ( "
                     +  userInfo.getUserId()  +   " )登陆了. " );
             return  actionInvocation.invoke();
            
        }
         /**  如果没有登陆  */
         else
        {
             return  Action.LOGIN;
        }
    }
    
     public  String getUserSessionKey()
    {
         return  userSessionKey;
    }
    
     public   void  setUserSessionKey(String userSessionKey)
    {
         this .userSessionKey  =  userSessionKey;
    }
    
     public  String getIsCheckLogin()
    {
         return  isCheckLogin;
    }
    
     public   void  setIsCheckLogin(String isCheckLogin)
    {
         this .isCheckLogin  =  isCheckLogin;
    }
    
}