list和map结合存储一张表

遍历Map方法：使用entrySet
遍历List方法：增强for循环(使用泛型!)

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;

public class map {

	public static void main(String[] args) {
		
		   Map<String,Object> m1=new HashMap<>();
		   
		   m1.put("id", 1001);
		   m1.put("姓名", "夏冬");
		   m1.put("薪水", 6000);
		   m1.put("入职日期", "2018.9");
           
		   
		   Map<String,Object> m2=new HashMap<>();
		   
		   m2.put("id", 1001);
		   m2.put("姓名", "春秋");
		   m2.put("薪水", 5000);
		   m2.put("入职日期", "2018.10");
		   
		   
           Map<String,Object> m3=new HashMap<>();
		   
		   m3.put("id", 1001);
		   m3.put("姓名", "严冬");
		   m3.put("薪水", 4000);
		   m3.put("入职日期", "2018.11");
		   
		   List<Map<String,Object>> list=new ArrayList<>();
		   list.add(m1);
		   list.add(m2);
		   list.add(m3);
		   
		   for(Map<String,Object> temp:list){
			   
			   Set<Entry<String, Object>>  ss = temp.entrySet();
			   for (Iterator iterator = ss.iterator(); iterator.hasNext();) {
				    Entry e = (Entry) iterator.next(); 
				    System.out.print(e.getKey()+":"+e.getValue()+"\t");
			   }
			  System.out.println();
			  System.out.println();
		   }
		
		
	}
	 
}