实验思路

1. 编写Interceptor 继承 AbstractInterceptor类
2. 重写public String intercept(ActionInvocation invocation)方法
3. 编写struts2.xml

关键struts2.xml 代码

                    
                         
                          
                          
                           
                          
      my first interceptor                
      
               复制代码

                        
     testuser                    
     123                    
     my changed interceptor
    复制代码

目录结构

实验结果

代码(关键代码,文末有实验5github链接)

struts.xml

            
            
             
             
             
             
             
             
             
             
                 
                      
                           
                            
                            
                             
                            
        my first interceptor                
                   
                  
                      
       
        /error.jsp
                   
                  
                      
                       
                   
                  
                      
       
        /users/login_userLoginPage.do
                   
              
             
                 
                      
       
        /users/login_userLoginPage
                   
              
             
                 
                      
       
        ${directUrl}
                       
       testadmin                
       123            
              
             
                 
                      
                           
        testuser                    
        123                    
        my changed interceptor                
                       
       
        ${directUrl}
                   
              
         
    复制代码

MyInterceptor.java

package com.zy.javaee.interceptor;import com.opensymphony.xwork2.ActionInvocation;import com.opensymphony.xwork2.interceptor.AbstractInterceptor;import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;import com.zy.javaee.controller.actions.UserLoginAction;import com.zy.javaee.domin.User;import java.util.Date;import java.util.Map;/** * Created by Joey_Tsai on 2018/4/11. */public class MyInterceptor extends  AbstractInterceptor {    private String myInterceptorParam;    private String defaultUsername;    public  String getDefaultPassword() {        return defaultPassword;    }    public void setDefaultPassword(String defaultPassword) {        this.defaultPassword = defaultPassword;    }    private String defaultPassword;    public String getDefaultUsername() {        return defaultUsername;    }    public void setDefaultUsername(String defaultUsername) {        this.defaultUsername = defaultUsername;    }    //    private String defaultPassword;    public String getMyInterceptorParam() {        return myInterceptorParam;    }    public void setMyInterceptorParam(String myInterceptorParam) {        this.myInterceptorParam = myInterceptorParam;    }    //省略getter和setter    @Override    public String intercept(ActionInvocation invocation) throws Exception {        // TODO Auto-generated method stub        Map paramMap = invocation.getInvocationContext().getParameters();        String[] username = (String[]) paramMap.get("user.username");        String[] password = (String[]) paramMap.get("user.password");        String result;        if (username != null && password != null){            String[] usernameParam = username[0].split(",");            String[] passwordParam = password[0].split(",");            User user = new User();            user.setUsername(usernameParam[0]);            user.setPassword(passwordParam[0]);            User defaultUser = new User();            defaultUser.setUsername(defaultUsername);            defaultUser.setPassword(defaultPassword);            UserLoginAction userLoginAction = (UserLoginAction) invocation.getAction();            userLoginAction.setUser(user);            userLoginAction.setDefaultUser(defaultUser);            System.out.println(myInterceptorParam + " 拦截器---开始执行登录Action的时间为" + new Date());            long start = System.currentTimeMillis();            result = invocation.invoke();            System.out.println(myInterceptorParam + " 拦截器---执行完登录Action的时间为" + new Date());            long end = System.currentTimeMillis();            System.out.println(myInterceptorParam + " 拦截器---执行Action的时间为" + (end - start) + "ms");        }        else result = invocation.invoke();        return result;    }}复制代码

GITHUB链接:https://github.com/joeytsai03/javaee_test5.git