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
