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:
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