Struts2中iterator标签遍历map总结

1.MapAction.java

 package com.zx.demo.action;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import com.opensymphony.xwork2.ActionSupport;
import com.zx.demo.model.Product;
import com.zx.demo.model.Student;

public class MapAction extends ActionSupport
{

    private Map map;

	private Map studentMap;

	private Map arrayMap;

	private Map> listMap;



	public String testMap()
	{
		map=new HashMap();
		map.put("1", "one");
		map.put("2", "two");

		studentMap=new HashMap();
		studentMap.put("student1",new Student(new Long(1),"20034140201","张三1","男",25));
		studentMap.put("student2",new Student(new Long(2),"20034140202","张三2","女",26));
		studentMap.put("student3",new Student(new Long(3),"20034140202","张三3","男",27));

		arrayMap=new HashMap();
		arrayMap.put("arr1", new String[]{"1","2003401","leejie","male","20"});
		arrayMap.put("arr2", new String[]{"2","2003402","huanglie","male","25"});
		arrayMap.put("arr3", new String[]{"3","2003403","lixiaoning","male","21"});



		listMap=new HashMap>();

		List list1=new ArrayList();
		list1.add(new Student(new Long(1),"20034140201","张三1","男",25));
		list1.add(new Student(new Long(2),"20034140202","张三2","男",25));
		list1.add(new Student(new Long(3),"20034140203","张三3","男",25));
		listMap.put("class1", list1);

		List list2=new ArrayList();
		list2.add(new Student(new Long(1),"20034140301","李四1","男",20));
		list2.add(new Student(new Long(2),"20034140302","李四2","男",21));
		list2.add(new Student(new Long(3),"20034140303","李四3","男",22));
		list2.add(new Student(new Long(4),"20034140304","李四4","男",23));
		listMap.put("class2", list2);




		return SUCCESS;

	}



	public Map getMap() {
		return map;
	}

	public void setMap(Map map) {
		this.map = map;
	}

	public Map getStudentMap() {
		return studentMap;
	}

	public void setStudentMap(Map studentMap) {
		this.studentMap = studentMap;
	}


	public Map getArrayMap() {
		return arrayMap;
	}


	public void setArrayMap(Map arrayMap) {
		this.arrayMap = arrayMap;
	}


	public Map> getListMap() {
		return listMap;
	}


	public void setListMap(Map> listMap) {
		this.listMap = listMap;
	}


}

2.testMap.jsp

 <%@ page contentType="text/html;charset=UTF-8" %>
<%@ taglib prefix="s" uri="/struts-tags" %>





   1.map中的value为String字符串

   
   

   key: 

   value:

   ******************************************

  


  2.map中的value为Student对象
  









    








    
      
key=value
      
ID
      
num
      
name
      
sex
      
age
    
    
     
     
     
     
     
     
    
      
  



  3.map中的value为String数组
  









    








    
      
key=value
      
ID
      
num
      
name
      
sex
      
age
    
    
     
     
     
     
     
     
    
      
  

  4.map中的value为list集合
  










     
     
      









    
      
class
      
ID
      
num
      
name
      
sex
      
age