Arraylist集合中装HashMap集合

package com.arraylist;


import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;


public class ArrayListIncludeHashMap {
public static void main(String[] args) {
//Arraylist集合中装HashMap集合
//创建大集合
ArrayList<HashMap<String, String>>al=new ArrayList<HashMap<String,String>>();
//创建小集合
HashMap<String, String> hm1=new HashMap<String, String>();
hm1.put("郭靖", "黄蓉");
hm1.put("杨过", "小龙女");
al.add(hm1);

HashMap<String, String> hm2=new HashMap<String, String>();
hm2.put("梁泊山", "祝英台");
hm2.put("宫崎骏", "千与千寻");
al.add(hm2);

HashMap<String, String> hm3=new HashMap<String, String>();
hm3.put("星仔", "大话西游");
hm3.put("华仔", "忘情水");
al.add(hm3);

//遍历大集合
for(HashMap<String, String> ha:al){
Set<String> set=ha.keySet();//通过hashmap得到键的集合
Iterator it=set.iterator();//遍历键的集合
while(it.hasNext()){
String key=(String) it.next();//得到每个键
String value=ha.get(key);//通过键得到键对应的值
System.out.println(key+"---"+value);
}
}
  }
}