struts2实验5:struts2 拦截器

---

layout: post

title: struts2实验5:struts2 拦截器

categories: STRUTS2

description: struts2实验5:struts2 拦截器

keywords: STRUTS2

---

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
                
            

                    testuser
                    123
                    my changed interceptor

目录结构

目录结构

实验结果

登陆界面

拦截结果

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}

            
        
    

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;
    }



}

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