Use the JSON data in JSON Data in Java Class Libraries user of JSON data in the JSON P default

Use the JSON data in java class libraries user of JSON data in Java Class Libralt PROVIDER of JSON P) JSON (JavaScript Object Notation) is a commonly used data exchange format, which is lightweight and easy to read and write.In the Java library, we can use the JSONP (JSON With Padding) default provider to process JSON data.This article will introduce how to process JSON data in the Java class library and provide some related code and configuration examples. JSONP is a technology restricted by Same Origin Policy for solving browsers.It uses the browser to achieve cross -domain data interaction between different domains by using the browser's characteristics of SCRIPT labels without being limited by homologous strategies. The first step in processing JSON data in Java is to import the dependencies of the JSONP default provider.You can use Maven, Gradle or manually import related jar files.The following is an example configuration using maven import: <dependency> <groupId>javax.json</groupId> <artifactId>javax.json-api</artifactId> <version>1.1.4</version> </dependency> <dependency> <groupId>org.glassfish</groupId> <artifactId>javax.json</artifactId> <version>1.1.4</version> </dependency> Next, we can use the class and methods provided by the program provided by the JSONP to process JSON data.The following is a simple example code: import javax.json.Json; import javax.json.JsonObject; import javax.json.JsonReader; public class JsonProcessingExample { public static void main(String[] args) { // json data string String jsonData = "{\"name\":\"John\",\"age\":30,\"city\":\"New York\"}"; // Create a JSONREADER object to resolve JSON data JsonReader jsonReader = Json.createReader(new StringReader(jsonData)); // Analyze JSON data as JSONOCT JsonObject jsonObject = jsonReader.readObject(); // Get the field value in JSON data String name = jsonObject.getString("name"); int age = jsonObject.getInt("age"); String city = jsonObject.getString("city"); // Print the analysis of the field value System.out.println("Name: " + name); System.out.println("Age: " + age); System.out.println("City: " + city); // Turn off jsonreader jsonReader.close(); } } In the above code, we first created a JSONREADER object to analyze JSON data.We then use the reading of JSONObject to obtain the field value in JSON data.Finally, we printed the analytical results according to the field name.Please note that after completing JSONREADER, you need to call the `Close ()" method to close the resources. To sum up, using the JSONP default program can easily process JSON data in the Java class library.By importing the correct dependencies and using the provided classes and methods, we can analyze, read and operate JSON data.This method is suitable for various scenarios, such as data interaction with external APIs, processing JSON data transmitted by the front end. I hope this article can help you understand how to process JSON data in the Java class library and how to configure related code and dependencies.