json与javabean互转 常用json与javabean互转的方法实现
郼嶧圛逸之君 人气:12想了解常用json与javabean互转的方法实现的相关内容吗，郼嶧圛逸之君在本文为您仔细讲解json与javabean互转的相关知识和一些Code实例，欢迎阅读和指正，我们先划重点：json与javabean互转,javabean转json，下面大家一起来学习吧。
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"));
}
}
运行结果
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);
}
}
运行结果
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"));
}
}
运行结果
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));
}
}
运行结果
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());
输出结果
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