使用fastJSON解析HashMap中的数据
发布时间：2020-12-16 19:03:27 所属栏目：百科 来源：网络整理
导读：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; pu
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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.parSEObject(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); } } （编辑：李大同） 【声明】本站内容均来自网络，其相关言论仅代表作者个人观点，不代表本站立场。若无意侵犯到您的权利，请及时与联系站长删除相关内容! |