struts2遍历map小结

1.MapAction.java

package com.uaes.util;

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

import com.opensymphony.xwork2.ActionSupport;

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 Integer(1), "20034140201", "张三1", "男", 25));
		studentMap.put("student2", new Student(new Integer(2), "20034140202", "张三2", "女", 26));
		studentMap.put("student3", new Student(new Integer(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 Integer(1), "20034140201", "张三1", "男", 25));
		list1.add(new Student(new Integer(2), "20034140202", "张三2", "男", 25));
		list1.add(new Student(new Integer(3), "20034140203", "张三3", "男", 25));
		listMap.put("class1", list1);

		List list2 = new ArrayList();
		list2.add(new Student(new Integer(1), "20034140301", "李四1", "男", 20));
		list2.add(new Student(new Integer(2), "20034140302", "李四2", "男", 21));
		list2.add(new Student(new Integer(3), "20034140303", "李四3", "男", 22));
		list2.add(new Student(new Integer(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;
	}

}

class Student {
	private Integer id;
	private String num;
	private String name;
	private String sex;
	private Integer age;

	public Student(Integer id, String num, String name, String sex, Integer age) {
		super();
		this.id = id;
		this.num = num;
		this.name = name;
		this.sex = sex;
		this.age = age;
	}

}

 

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