pubg 依赖安装

举例：

原始数据：{001=张三, 002=李四, 003=王五, 004=赵六}
目标数据：
{value=张三, key=001}
{value=李四, key=002}
{value=王五, key=003}
{value=赵六, key=004}

package test02;

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

public class Test08 {
	
	public static void main(String[] args) {
			
		List<Map<String, String>> list = new ArrayList<Map<String, String>>();
		Map<String, String> map1=new HashMap<>();	
		map1.put("001","张三");
		map1.put("002","李四");
		map1.put("003","王五");
		map1.put("004","赵六");
		list.add(map1);
		for (int i = 0; i < list.size(); i++) {
			System.out.println(list.get(i));
		}
		System.out.println("-------------------------------");
		List<Map<String, String>> newList = new ArrayList<>();
		for (int i = 0; i < list.size(); i++) {
			Set<Map.Entry<String, String>> entries = list.get(i).entrySet();
            for (Map.Entry<String, String> entry : entries) {
                Map<String, String> map = new HashMap<>();
                map.put("key",entry.getKey());
                map.put("value",entry.getValue());
                newList.add(map);
            }
		}
		
		for (int i = 0; i < newList.size(); i++) {
			System.out.println(newList.get(i));
		}
	}
}

输出：

{001=张三, 002=李四, 003=王五, 004=赵六}
-------------------------------
{value=张三, key=001}
{value=李四, key=002}
{value=王五, key=003}
{value=赵六, key=004}

单独封装工具类案例：

	/*
     * 工具类：map 或 List map 转 List map；
     *
     */
    public static List<Map<String, String>> mapToListObj(List<Map<String, String>> list){
        List<Map<String, String>> newListMap = new ArrayList<>();
        for (int i = 0; i < list.size(); i++) {
            Set<Map.Entry<String, String>> entries = list.get(i).entrySet();
            for (Map.Entry<String, String> entry : entries) {
                Map<String, String> map = new HashMap<>();
                map.put("key",entry.getKey());
                map.put("title",entry.getValue());
                map.put("value",entry.getKey());
                newListMap.add(map);
            }
        }
        return newListMap;
    }