Struts2使用OGNL遍历各种map总结一.Action中的代码：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;

//这里省略get set方法

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;
}
}
二.前端测试页面：testMap.jsp
Java代码
<%@ page
contentType="text/html;charset=UTF-8"
%>
<%@ taglib prefix="s"
uri="/struts-tags" %>

1.map中的key为String，value为String字符串


key:
value:

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

******************************************
2.map中的key为String，value为Student对象

key=value	ID	num	name	sex	age

******************************************
3.map中的key为String，value为String数组

key=value	ID	num	name	sex	age

******************************************
4.map中的key为String，value为list集合

class	ID	num	name	sex	age

附：map的类型为Map在前端遍历，session.powerList存放的类型是：List（Menu）

• ‘)” >

http://blog.sina.com.cn/s/blog_7ffb8dd501014k8y.html