jsonobject 与 jsonarray区别
jsonobject:
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{ "area" : "武汉" , "name" : "张三" , "age" : 25 } |
jsonarray:
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[{ [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
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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
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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
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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
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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
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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
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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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原文链接：https://blog.csdn.net/zyz_YZJ/article/details/115443741
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