java接口，避开登录方法-

    @Override
    public String intercept(ActionInvocation invocation) throws Exception {
        ActionContext actionContext = invocation.getInvocationContext();     
        Map<String,Object> session = actionContext.getSession();
        HttpServletRequest request= (HttpServletRequest) actionContext.get(StrutsStatics.HTTP_REQUEST);
        String methodName = invocation.getProxy().getMethod();
        String actionName = actionContext.getName();
        UserVo userVo=(UserVo)session.get("userVo");
        //如果是登录面，不检查session
        if((actionName.equals("userAjax") && methodName.equals("login")) 
                || (actionName.equals("danweiAjax") && methodName.equals("getDanWeiList")) 
                || (actionName.equals("userAjax") && methodName.equals("checkUserExist"))
                || (actionName.equals("userAjax") && methodName.equals("checkUserExist_ganbuzhuce"))
                || (actionName.equals("userAjax") && methodName.equals("loadMessage"))
               || (actionName.equals("danweiAjax") && methodName.equals("addGanbuzhuce")) 
                ){
            return invocation.invoke();
        }
        
        if(userVo==null){
            request.setAttribute("errorMessage", "登录超时，请重新登录!");
            return "error";
        }else{
            return invocation.invoke();
        }
    }

package com.dafu.util;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.apache.struts2.StrutsStatics;

import com.dafu.model.User;
import com.dafu.vo.UserVo;
import com.opensymphony.xwork2.ActionContext;
import com.opensymphony.xwork2.ActionInvocation;
import com.opensymphony.xwork2.interceptor.Interceptor;

public class CheckUserInterceptor implements Interceptor {

    /**
     * 
     */
    private static final long serialVersionUID = -4295779087746721183L;

    @Override
    public void destroy() {

    }

    @Override
    public void init() {

    }

    @Override
    public String intercept(ActionInvocation invocation) throws Exception {
        ActionContext actionContext = invocation.getInvocationContext();     
        Map<String,Object> session = actionContext.getSession();
        HttpServletRequest request= (HttpServletRequest) actionContext.get(StrutsStatics.HTTP_REQUEST);
        String methodName = invocation.getProxy().getMethod();
        String actionName = actionContext.getName();
        UserVo userVo=(UserVo)session.get("userVo");
        //如果是登录面，不检查session
        if((actionName.equals("userAjax") && methodName.equals("login")) 
                || (actionName.equals("danweiAjax") && methodName.equals("getDanWeiList")) 
                || (actionName.equals("userAjax") && methodName.equals("checkUserExist"))
                || (actionName.equals("userAjax") && methodName.equals("checkUserExist_ganbuzhuce"))
                || (actionName.equals("userAjax") && methodName.equals("loadMessage"))
               || (actionName.equals("danweiAjax") && methodName.equals("addGanbuzhuce")) 
                ){
            return invocation.invoke();
        }
        
        if(userVo==null){
            request.setAttribute("errorMessage", "登录超时，请重新登录!");
            return "error";
        }else{
            return invocation.invoke();
        }
    }
}