struts2 迭代

 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<String,String> map;

private Map<String,Student> studentMap;

private Map<String,String[]> arrayMap;

private Map<String,List<Student>> listMap;

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

    studentMap=new HashMap<String,Student>();
    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<String,String[]>();
    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<String,List<Student>>();

    List<Student> list1=new ArrayList<Student>();
    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<Student> list2=new ArrayList<Student>();
    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<String, String> getMap() {
    return map;
}
public void setMap(Map<String, String> map) {
    this.map = map;
}

public Map<String, Student> getStudentMap() {
    return studentMap;
}
public void setStudentMap(Map<String, Student> studentMap) {
    this.studentMap = studentMap;
}
public Map<String, String[]> getArrayMap() {
    return arrayMap;
}
public void setArrayMap(Map<String, String[]> arrayMap) {
    this.arrayMap = arrayMap;
}
public Map<String, List<Student>> getListMap() {
    return listMap;
}
public void setListMap(Map<String, List<Student>> listMap) {
    this.listMap = listMap;
}

}

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


struts2中的map遍历总结


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