做暧昧视频网站,wordpress京东主题分享,网站开发语言哪个好,专门做茶叶的网站本文中主要介绍JSONObject处理json数据时候的一些常用场景和方法。
#xff08;一#xff09;jar包下载
所需jar包打包下载百度网盘地址#xff1a;https://pan.baidu.com/s/1c27Uyre#xff08;二#xff09;常见场景及处理方法
1、解析简单的json字符串#xff1a;1 …本文中主要介绍JSONObject处理json数据时候的一些常用场景和方法。
一jar包下载
所需jar包打包下载百度网盘地址https://pan.baidu.com/s/1c27Uyre二常见场景及处理方法
1、解析简单的json字符串
1 // 简单的json测试字符串
2 public static final String JSON_SIMPLE {name:tom,age:16};
3
4 JSONObject obj JSONObject.fromObject(JSON_SIMPLE);
5 System.out.println(name is : obj.get(name));
6 System.out.println(age is : obj.get(age));输出
name is : tomage is : 162、解析嵌套的json字符串
1 // 嵌套的json字符串
2 public static final String JSON_MULTI {name:tom,score:{Math:98,English:90}};
3 JSONObject obj JSONObject.fromObject(JSON_MULTI);
4 System.out.println(name is : obj.get(name));
5 System.out.println(score is : obj.get(score));
6
7 JSONObject scoreObj (JSONObject) obj.get(score);
8 System.out.println(Math score is : scoreObj.get(Math));
9 System.out.println(English score is : scoreObj.get(English));输出
name is : tomscore is : {English:90,Math:98}Math score is : 98English score is : 903、把bean对象转化成JSONObject对象
Person、Info、Score类分别如下注要定义成独立的三个public类不能定义成内部类或非public类否则会转换异常1 public class Person {2 private String name;3 4 private Info info;5 6 public String getName() {7 return name;8 }9
10 public void setName(String name) {
11 this.name name;
12 }
13
14 public Info getInfo() {
15 return info;
16 }
17
18 public void setInfo(Info info) {
19 this.info info;
20 }
21
22 Override
23 public String toString() {
24 return Person [name name , info info ];
25 }
26
27 }1 public class Info {2 private int age;3 private Score score;4 5 public int getAge() {6 return age;7 }8 9 public void setAge(int age) {
10 this.age age;
11 }
12
13 public Score getScore() {
14 return score;
15 }
16
17 public void setScore(Score score) {
18 this.score score;
19 }
20
21 Override
22 public String toString() {
23 return Info [age age , score score ];
24 }
25
26 }1 public class Score {2 private String math;3 private String english;4 5 public String getMath() {6 return math;7 }8 9 public void setMath(String math) {
10 this.math math;
11 }
12
13 public String getEnglish() {
14 return english;
15 }
16
17 public void setEnglish(String english) {
18 this.english english;
19 }
20
21 Override
22 public String toString() {
23 return Score [math math , english english ];
24 }
25
26 }转换方法1 Score score new Score();2 score.setEnglish(A);3 score.setMath(B);4 5 Info info new Info();6 info.setAge(20);7 info.setScore(score);8 9 Person person new Person();
10 person.setInfo(info);
11 person.setName(Tim);
12
13 JSONObject obj JSONObject.fromObject(person);
14 System.out.println(obj.toString());输出{ name: Tim, info: { score: { english: A, math: B }, age: 20 }}4、把json数组转换成JsonObject数组1 // 数组形式的json2 public static final String JSON_ARRAY [{name:tom},{name:john,age:20},{}];3 4 JSONArray arr JSONArray.fromObject(JSON_ARRAY);5 System.out.println(arr);6 7 for (int i 0; i arr.size(); i) {8 JSONObject obj arr.getJSONObject(i);9 System.out.println(obj.toString());
10 }输出
[{name:tom},{name:john,age:20},{}]{name:tom}{name:john,age:20}{}5、构造一个json字符串1 JSONObject obj new JSONObject();2 obj.put(name, tom);3 obj.put(age, 19);4 5 // 子对象6 JSONObject objContact new JSONObject();7 objContact.put(tel, 123456);8 objContact.put(email, tomtest.com);9 obj.put(contact, objContact);
10
11 // 子数组对象
12 JSONArray scoreArr new JSONArray();
13 JSONObject objEnglish new JSONObject();
14 objEnglish.put(course, english);
15 objEnglish.put(result, 100);
16 objEnglish.put(level, A);
17
18 JSONObject objMath new JSONObject();
19 objMath.put(course, math);
20 objMath.put(result, 50);
21 objMath.put(level, D);
22
23 scoreArr.add(objEnglish);
24 scoreArr.add(objMath);
25
26 obj.put(score, scoreArr);
27
28 System.out.println(obj.toString());输出
{ score: [ { result: 100, level: A, course: english }, { result: 50, level: D, course: math } ], contact: { tel: 123456, email: tomtest.com }, name: tom, age: 19}
思考输出的json中的字段的顺序有没有办法设置
