Introduction of tool categories and methods commonly used in JSON SIMPLE framework

JSON SIMPLE is a simple Java JSON processing library.It supports mutual conversion of Java objects and JSON data and provides some commonly used tool categories and methods to process JSON data.Here will introduce the commonly used tools and methods in JSON SIMPLE. 1. JSONObject class: The JSONObject class is one of the most commonly used categories in JSON SIMPLE.It represents a JSON object and provides a series of methods to operate JSON data.Here are some commonly used JSONObject methods: -` PUT (key, value) `: Add a key value pair to the JSON object. JSONObject jsonObject = new JSONObject(); jsonObject.put ("name", "Zhang San"); jsonObject.put("age", 30); -` Get (key) `: Get the value corresponding to the specified key. String name = jsonObject.get("name").toString(); int age = Integer.parseInt(jsonObject.get("age").toString()); -` tostring () `: convert the JSON object to a string. String jsonString = jsonObject.toString(); 2. jsonarray class: The JSONARAY class represents a JSON array that is a subclass of JSONObject.JSONARAY provides some ways to operate the JSON array.Here are some commonly used JSONARAY methods: -` ADD (Value) `: Add a value to the JSON array. JSONArray jsonArray = new JSONArray(); jsonarray.add ("Apple"); jsonarray.add ("Banana"); -`get (index)`: Get the value at the specified index position. String fruit = jsonArray.get(0).toString(); -`size ()`: Get the length of the array. int length = jsonArray.size(); 3. JSONPARSER class: The JSONPARSER class is used to analyze the JSON string.It provides a method of `Parse (JSONSTRING), which analyzes the given JSON string as a JSON object or JSON array. JSONParser parser = new JSONParser(); JSONObject jsonObject = (JSONObject) parser.parse(jsonString); JSONParser parser = new JSONParser(); JSONArray jsonArray = (JSONArray) parser.parse(jsonString); 4. JSONSERIALIZER class: The JSONSERIZER class is used to serialize the Java object to the JSON string.It provides the `Serialize (Object) method, and sequences the specified Java objects into JSON string. JSONSerializer serializer = new JSONSerializer(); String jsonString = serializer.serialize(myObject); The above is the introduction of some tool categories and methods commonly used in JSON SIMPLE.Through these tool types and methods, we can easily process JSON data in the Java program.Please note that in order to use JSON SIMPLE, you need to add the corresponding dependencies in the project. references: - [JSON SIMPLE GITHUB Page] (https://github.com/fangyidong/json-simple)