JSONObject is just a data structure, which can be understood as a data structure in JSON format ( pom: <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>1.2.28</version> </dependency> 1. Generate json data format natively.JSONObject zhangsan = new JSONObject(); try { //Add zhangsan.put("name", "张三"); zhangsan.put("age", 18.4); zhangsan.put("birthday", "1900-20-03"); zhangsan.put("majar", new String[] {"哈哈","嘿嘿"}); zhangsan.put("null", null); zhangsan.put("house", false); System.out.println(zhangsan.toString()); } catch (JSONException e) { e.printStackTrace(); } 2. Generated through hashMap data structureHashMap<String, Object> zhangsan = new HashMap<>(); zhangsan.put("name", "张三"); zhangsan.put("age", 18.4); zhangsan.put("birthday", "1900-20-03"); zhangsan.put("majar", new String[] {"哈哈","嘿嘿"}); zhangsan.put("null", null); zhangsan.put("house", false); System.out.println(new JSONObject(zhangsan).toString()); 3. Generate through entitiesStudent student = new Student(); student.setId(1); student.setAge("20"); student.setName("张三"); //Generate json format System.out.println(JSON.toJSON(student)); //Convert the object to string String stuString = JSONObject.toJSONString(student); 4.Convert JSON string into JSON objectString studentString = "{\"id\":1,\"age\":2,\"name\":\"zhang\"}"; //Convert JSON string into JSON object JSONObject jsonObject1 = JSONObject.parseObject(stuString); System.out.println(jsonObject1); 5. Convert list object to listJsonArrayList<Student> studentLsit = new ArrayList<>(); Student student1 = new Student(); student1.setId(1); student1.setAge("20"); student1.setName("asdasdasd"); studentLsit.add(student1); Student student2 = new Student(); student2.setId(2); student2.setAge("20"); student2.setName("aaaa:;aaa"); studentLsit.add(student2); // list to json string String string = JSON.toJSON(studentLsit).toString(); System.out.println(string); //Convert json string to listJson format JSONArray jsonArray = JSONObject.parseArray(string); System.out.println(jsonArray); Alibaba's json is very easy to use, and Google's Gson is also good. If you are interested, you can take a look This concludes this article on the detailed usage of JSONObject. I hope it will be helpful for everyone’s study, and I also hope that everyone will support 123WORDPRESS.COM. You may also be interested in:
|
<<: Tutorial on installing mysql5.7.36 database in Linux environment
>>: Use html-webpack-plugin' to generate HTML page plugin in memory
This article example shares the specific code of ...
MySQL is a relational database management system ...
Table of contents 1. Introduction to jQuery 2. jQ...
Table of contents Axios Request Qs processing dat...
Table of contents 1. Container service update and...
What is text wrapping around images? This is the ...
This article introduces blue-green deployment and...
When creating a tomcat server on a local eclipse,...
This article records the VMware Workstation 12 Pr...
Install crontab yum install crontabs CentOS 7 com...
Problem Description Recently, there was a MySQL5....
background: Since the company's projects seem...
Table of contents Preface Global Lock Table lock ...
Understanding of polling In fact, the focus of po...
To transfer files between the host and the contai...