struts2获取值封装到List和Map

一、封装数据到List

1、实现步骤

• 在action声明List
• 生成List变量的set和get方法
• 在表单输入项写表达式

2、实现代码

Userbean.java

package work.zhangdoudou.Bean;

public class User {
    private String username;
    private String password;
    private String type;
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }   
}

ListAction.java

package work.zhangdoudou.action;

import java.util.List;
import com.opensymphony.xwork2.ActionSupport;
import work.zhangdoudou.Bean.User;

public class ListAction extends ActionSupport{
    private List list;
    
    
    public List getList() {
        return list;
    }

    public void setList(List list) {
        this.list = list;
    }

    @Override
    public String execute() throws Exception {
        System.out.println(list);
        return NONE;
    }
}

struts.xml

    
    
    
        
            /success.jsp
           
    

web.xml

  struts2_ListAndMap
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
  
    struts2
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  
  
    struts2
    /*
  

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
    
    
        
    
    
    
  
  
  
    

        
Login
        

        
            username:


            password:


            type:


            

            username:


            password:


            type:


            
        
    
  

success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
    
    
    
        
    
    
    

  
  
  
    

    ${list[0].username }
    ${list[0].password }
    ${list[0].type }
    

    ${list[1].username }
    ${list[1].password }
    ${list[1].type }
    
  

3、运行效果

image.png

image.png

image.png

一、封装数据到Map

1、实现步骤

• 在action声明Map
• 生成Map变量的set和get方法
• 在表单输入项写表达式

2、实现代码

Userbean.java

package work.zhangdoudou.Bean;

public class User {
    private String username;
    private String password;
    private String type;
    
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }   
}

MapAction.java

package work.zhangdoudou.action;

import java.util.Map;
import com.opensymphony.xwork2.ActionSupport;
import work.zhangdoudou.Bean.User;

public class MapAction extends ActionSupport{
    private Map map;
    
    public Map getMap() {
        return map;
    }
    public void setMap(Map map) {
        this.map = map;
    }
    
    @Override
    public String execute() throws Exception {
        System.out.println(map);
        return NONE;
    }
}

struts.xml

    
    
    
        
            /success.jsp
        
    

web.xml

  struts2_ListAndMap
  
    index.html
    index.htm
    index.jsp
    default.html
    default.htm
    default.jsp
  
  
    struts2
    org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter
  
  
    struts2
    /*
  

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
    
    
        
    
    
    
  
  
  
    

        
Login
        

        
            username:


            password:


            type:


            

            username:


            password:


            type:


            
        
    
  

success.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>



  
    
    
    
    
    
    
        
    
    
    

  
  
  
    

    ${map['one'].username }
    ${map['one'].password }
    ${map['one'].type }
    

    ${map['two'].username }
    ${map['two'].password }
    ${map['two'].type }
    
  

三、运行效果

image.png

image.png

image.png