JSON P's default analysis of programs and the integration method of the Java class library (Analysis of the Principles of the DEFAULT PROVIDER of JSON P and Its Integration with Java Class Libraries))

JSON P is the abbreviation of Java API for JSON Processing. It is a set of APIs used to process JSON data in Javaee.JSON (JavaScript Object Notation) is a lightweight data exchange format, which is often used in front -end data transmission.JSON P provides a simple and flexible way to process JSON data, including parsing, generating and operational functions. The principle of the JSON P provision program is to operate JSON data by providing a set of APIs.The core interfaces include JSONPARSER, JSONREADER, JSONWRITER, etc., which are used to analyze, read and write JSON data.Through these interfaces, developers can easily analyze the external JSON data, or generate JSON data and return to the front -end page. JSON P also provides a JSONObject class to represent the JSON tree node and a JSONARAY class to represent the JSON array.Developers can use these classes to access and operate JSON data. There are mainly the following ways with the Java class library: 1. Import JSON P API: First of all, you need to import the relevant API of JSON P in the project.You can add JSON P dependencies to the project's dependency management file through Maven, and then download and import the API by constructing tools.You can also download the corresponding jar file directly from the official website and manually import it into the project. 2. Write JSON P code: Next, you can write the Java code to use the function of JSON P.For example, using JSONPARSER to parse JSON data and use the JSONObject or JSONARRAY class to access and operate JSON data. 3. Configure the JSON P program: If the default provider of JSON P is used, there is no additional configuration.However, if you need to use other JSON P providers, configuration can be configured by specifying the program path of the program in the configuration file of the project. 4. Integrated JSON P and Java class libraries: JSON P provides functions of integration with Java libraries.The parsed JSON data can be mapped to the Java object, or the Java object is converted to JSON data.This can be achieved by adding related annotations or configurations to the Java class. The following is the example code of JSON P: import javax.json.Json; import javax.json.JsonObject; import javax.json.JsonReader; import javax.json.JsonWriter; public class JsonExample { public static void main(String[] args) { // Create a json object JsonObject jsonObject = Json.createObjectBuilder() .add("name", "John") .add("age", 30) .build(); // Write the JSON object into the file or output stream try (JsonWriter writer = Json.createWriter(System.out)) { writer.writeObject(jsonObject); } // Read the JSON object from the file or input stream try (JsonReader reader = Json.createReader(System.in)) { JsonObject jsonObject2 = reader.readObject(); System.out.println(jsonObject2); } } } Through the above code, we can create a simple JSON object and write it into the output stream.At the same time, we can also read JSON objects from the input stream and perform corresponding operations. In summary, JSON P provides a simple and flexible way to process JSON data and can be easily integrated into the Java library, so that developers can more conveniently operate and process JSON data.