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