前端之家收集整理的这篇文章主要介绍了
使用fastJSON解析HashMap中的数据，
前端之家小编觉得挺不错的，现在分享给大家，也给大家做个参考。
package com.silei.day1015.fastJson; import java.util.HashMap; import java.util.Iterator; import java.util.Map; import java.util.Map.Entry; import java.util.Set; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.TypeReference; public class Demo { public static void main(String[] args) { Map<String,Student> map = new HashMap<String,Student>(); Student stu1 = new Student("1","莎拉波娃"); Student stu2 = new Student("2","布沙尔"); Student stu3 = new Student("3","哈勒普"); map.put("00011",stu1); map.put("00012",stu2); map.put("00013",stu3); objectToStr(map); String str="{'00011':{'id':'1','name':'silei'},'00012':{'id':'2','name':'布沙尔'},'00013':{'id':'3','name':'哈勒普'}}"; strToObject(str); } public static void strToObject(String str){ Map<String,Student> map=(Map<String,Student>) JSON.par
SEObject(str,new TypeReference<Map<String,Student>>() {}); Set<Entry<String,Student>> m= map.entrySet(); Iterator<Entry<String,Student>> it=m.iterator(); while(it.hasNext()){ Entry<String,Student> en=it.next(); String id=en.getKey(); Student stu=en.getValue(); System.out.println(stu.getId()+"==="+stu.getName()); } System.out.println(map.size()); } // 把对象转换成JSON字符串 public static void objectToStr(Map map) { String str = JSON.toJSONString(map); System.out.println(str); } }
原文链接：https://www.f2er.com/json/289589.html
