Research on Jackson DataFormat in Java Library: Smile framework technical principles

Jackson DataFormat: Smile is a Java class library for serializing Java objects to Smile (binary) format or serialization of Smile data into Java objects.Smile (referred to as "Structured Message Language") is a binary data format based on JSON, which aims to provide higher performance and smaller data size. Jackson DataFormat: Smile library is in the Jackson JSON library and provides support for Smile format.It uses an encoding method called "BINARY SMILE" to sequence the Java object into a binary Smile format.This encoding method uses a series of bytes to represent the structure and data of the Java object.Compared with the JSON format, the code format is more compact, so it takes up less space on network transmission and storage. In order to study the technical principles of Jackson DataFormat: Smile, we can explore the following aspects: 1. Smile format code: Understand how the binary Smile encoding method converts the Java object into a binary format.This involves details such as encoding, type representation, field name of data structure.You can learn more about the specific implementation by reading the source code of Jackson DataFormat: Smile. 2. Decoding method of Smile format: Study the back -order process of binary Smile coding, that is, how to convert Smile data back to Java objects.Understanding the decoding method of Smile format is very important for processing SMILE data received from external systems. 3. Performance optimization: Learn Jackson DataFormat: How does Smile use the use of Smile to improve performance.Comparing the differences between SMILE and JSON formats, and explore how to maximize the use of Smile's characteristics to improve the efficiency of the application. The following is a Java code example using Jackson DataFormat: Smile for serialization and desertileization: import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.dataformat.smile.SmileFactory; public class JacksonSmileExample { public static void main(String[] args) throws Exception { // Create SmileFactory example SmileFactory smileFactory = new SmileFactory(); // Create ObjectMapper instances and set it with Smile format ObjectMapper objectMapper = new ObjectMapper(smileFactory); // Sequence the Java object to SMILE format byte array byte[] smileData = objectMapper.writeValueAsBytes(new MyObject()); // Turn the back sequence of the Smile format bytes into the Java object MyObject deserializedObject = objectMapper.readValue(smileData, MyObject.class); } } class MyObject { private String name; private int age; // getters and setters } In the above example, we first create a SmileFactory instance and then use it to create an ObjectMapper instance.By passing SmileFactory to the constructor of the ObjectMapper, we told ObjectMapper to serialize and derive with the Smile format. Next, we created a Java object MyObject containing the "Name" and "Age" attributes, and using ObjectMapper to serialize it into the byte array of Smile format.Finally, we use ObjectMapper to sequence the SMILE format bytes into the Java object MyObject. To sum up, Jackson DataFormat: Smile is a powerful tool for serializing the Java object to Smile format or serialization of Smile data into Java objects.By studying its technical principles in depth, we can better understand the coding and decoding process of the Smile format, and to optimize the performance of the application.