jsonobject 與 jsonarray區別
jsonobject:
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{ "area": "武漢", "name": "張三", "age": 25 } |
jsonarray:
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[{“area”: “武漢”,“name”: “張三”,“age”: 25},{“area”: “深圳”,“name”: “李四”,“age”: 22}] |
通俗來講 jsonobject 是對象的json形式 jsonarry 是對象集合的json形式。
json 與javabean互轉
json用阿里的fastjson 包
用例java對象
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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轉json
方法一：通過java對象轉成string再轉成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){ //先通過構造函數初始化一個對象 user user=new user((long) 1,"admin","admin","張三",true,"123456"); //先將java對象轉為string類型 string jsonstring= jsonobject.tojsonstring(user); //再將string類型轉為jsonobject jsonobject jsonobject=jsonobject.parseobject(jsonstring); system.out.println(jsonobject); //轉為jsonobject后就可以隨時根據鍵值獲取他的元素了 system.out.println(jsonobject.get("password")); }} |
運行結果
方法2：java對象直接轉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){ //先通過構造函數初始化一個對象 user user=new user((long) 1,"admin","admin","張三",true,"123456"); jsonobject jsonobject= (jsonobject) jsonobject.tojson(user); system.out.println(jsonobject); }} |
運行結果
json字符串轉jsonobeject
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public class testmain { public static void main(string []args){ string str="{\"password\":\"admin\",\"gender\":true,\"name\":\"張三\",\"telephone\":\"123456\",\"id\":1,\"account\":\"admin\"}"; jsonobject jsonobject=jsonobject.parseobject(str); system.out.println("account: "+jsonobject.get("account")+"---"+"paasword: "+jsonobject.get("password")); }} |
運行結果
3.jsonstring 轉jsonarray
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public class testmain { public static void main(string []args){ string str="{\"data\":[{\"password\":\"admin\",\"gender\":true,\"name\":\"張三\",\"telephone\":\"123456\",\"id\":1,\"account\":\"admin\"}]}"; //先轉成jsonobject jsonobject jsonobject=jsonobject.parseobject(str); //再將jsonobject中數組類型數據取出轉成jsonarray jsonarray jsonarray=jsonobject.getjsonarray("data"); system.out.println(jsonarray.get(0)); }} |
運行結果
4.json字符串轉java對象
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string str="{\"password\":\"admin\",\"gender\":true,\"name\":\"張三\",\"telephone\":\"123456\",\"id\":1,\"account\":\"admin\"}";// 前面是json字符串 后面是java對象類型user user=jsonobject.parseobject(str,user.class);system.out.println("account: "+user.getaccount()+"---"+"paasword: "+user.getpassword()); |
輸出結果
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原文鏈接：https://blog.csdn.net/zyz_YZJ/article/details/115443741
