Struts2中iterator标签遍历map总结

1.MapAction.java

Java代码
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;   
    }   
       
       
} 
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

Java代码
<%@ 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