JSON和Javabean如何实现互转

这篇文章主要介绍"JSON和Javabean如何实现互转"，在日常操作中，相信很多人在JSON和Javabean如何实现互转问题上存在疑惑，小编查阅了各式资料，整理出简单好用的操作方法，希望对大家解答"JSON和Javabean如何实现互转"的疑惑有所帮助！接下来，请跟着小编一起来学习吧！

JSONObject 与 JSONArray区别

JSONObject:

{        "area": "武汉",        "name": "张三",        "age": 25        }

JSONArray:

[{                "area": "武汉",                "name": "张三",                "age": 25                },                {                "area": "深圳",                "name": "李四",                "age": 22                }]

通俗来讲 JSONObject 是对象的json形式 JSONArry 是对象集合的JSON形式。

JSON 与javabean互转

JSON用阿里的fastjson 包

用例java对象

public class User { protected Long id; protected String account; protected String password; protected String name; protected boolean gender; protected String telephone; @Override public String toString() {  return "User{" +    "id=" + id +    ", account='" + account + ''' +    ", password='" + password + ''' +    ", name='" + name + ''' +    ", gender=" + gender +    ", telephone='" + telephone + ''' +    '}'; } public boolean isGender() {  return gender; } public void setGender(boolean gender) {  this.gender = gender; } public String getTelephone() {  return telephone; } public void setTelephone(String telephone) {  this.telephone = telephone; } public String getName() {  return name; } public void setName(String name) {  this.name = name; } public Long getId() {  return id; } public void setId(Long id) {  this.id = id; } public String getAccount() {  return account; } public void setAccount(String account) {  this.account = account; } public String getPassword() {  return password; } public void setPassword(String password) {  this.password = password; }}

1、javabean转json

方法一：通过java对象转成String再转成JSONObject

package com.handoop.gms.utils;import com.alibaba.fastjson.JSONObject;import com.handoop.gms.domain.User;public class TestMain { public static void main(String []args){  //先通过构造函数初始化一个对象  User user=new User((long) 1,"admin","admin","张三",true,"123456");  //先将java对象转为String类型  String jsonString= JSONObject.toJSONString(user);  //再将String类型转为JSONObject  JSONObject jsonObject=JSONObject.parseObject(jsonString);  System.out.println(jsonObject);  //转为JSONObject后就可以随时根据键值获取他的元素了  System.out.println(jsonObject.get("password")); }}

方法2：java对象直接转json

package com.handoop.gms.utils;import com.alibaba.fastjson.JSONArray;import com.alibaba.fastjson.JSONObject;import com.handoop.gms.domain.User;public class TestMain { public static void main(String []args){  //先通过构造函数初始化一个对象  User user=new User((long) 1,"admin","admin","张三",true,"123456");  JSONObject jsonObject= (JSONObject) JSONObject.toJSON(user);  System.out.println(jsonObject); }}

json字符串转JSONObeject

public class TestMain { public static void main(String []args){  String str="{"password":"admin","gender":true,"name":"张三","telephone":"123456","id":1,"account":"admin"}";  JSONObject jsonObject=JSONObject.parseObject(str);  System.out.println("account: "+jsonObject.get("account")+"---"+"paasword: "+jsonObject.get("password")); }}

3.jsonString 转JSONArray

public class TestMain { public static void main(String []args){  String str="{"data":[{"password":"admin","gender":true,"name":"张三","telephone":"123456","id":1,"account":"admin"}]}";  //先转成JSONObject  JSONObject jsonObject=JSONObject.parseObject(str);  //再将JSONObject中数组类型数据取出转成JSONArray  JSONArray jsonArray=jsonObject.getJSONArray("data");  System.out.println(jsonArray.get(0)); }}

4.JSON字符串转JAVA对象

   String str="{"password":"admin","gender":true,"name":"张三","telephone":"123456","id":1,"account":"admin"}";   // 前面是JSON字符串 后面是java对象类型   User user=JSONObject.parseObject(str,User.class);   System.out.println("account: "+user.getAccount()+"---"+"paasword: "+user.getPassword());

到此，关于"JSON和Javabean如何实现互转"的学习就结束了，希望能够解决大家的疑惑。理论与实践的搭配能更好的帮助大家学习，快去试试吧！若想继续学习更多相关知识，请继续关注网站，小编会继续努力为大家带来更多实用的文章！