CBOR (Simplified binary object) in the application scenario in the Java library

CBOR (Simplified binary object) is a compact and efficient binary data representing format, which is widely used in network communication and data storage.By converting data into a binary format, CBOR can not only reduce the size of the data transmission, but also improve the analysis and processing efficiency of data.In the Java class library, CBOR's application scenarios are very rich.This article will introduce the application scenarios of CBOR in Java and provide relevant code examples. 1. Network communication In network communication, data transmission and analytical efficiency are very important.CBOR, as a compact binary data represents format, can effectively reduce the transmission of data, thereby improving the efficiency of network communication.There are many libraries that support CBOR coding in the Java library, such as Jackson and Eclipse IoT.The following is an example of using the Jackson library for CBOR coding: import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.dataformat.cbor.CBORFactory; import com.fasterxml.jackson.dataformat.cbor.CBORGenerator; import com.fasterxml.jackson.dataformat.cbor.CBORParser; import java.io.ByteArrayOutputStream; import java.io.IOException; public class CborExample { public static void main(String[] args) throws IOException { // Create a CBOR generator CBORFactory cborFactory = new CBORFactory(); ByteArrayOutputStream outputStream = new ByteArrayOutputStream(); CBORGenerator cborGenerator = cborFactory.createGenerator(outputStream); // Write into the CBOR object cborGenerator.writeStartObject(); cborgenrator.writeStringfield ("name", "Zhang San"); cborGenerator.writeNumberField("age", 20); cborGenerator.writeEndObject(); // Turn off the generator cborGenerator.close(); // Printing CBOR data byte[] cborData = outputStream.toByteArray(); System.out.println ("CBOR data:" + New String (CBORDATA)); // Create a CBOR parser CBORParser cborParser = cborFactory.createParser(cborData); // Analyze the CBOR object cborparser.nextTken (); // Start signs of the CBOR object while (cborParser.nextToken() != null) { String fieldName = cborParser.getCurrentName(); cborparser.nextTken (); // Move to the value of the field String fieldValue = cborParser.getText(); System.out.println(fieldName + ": " + fieldValue); } // Turn off the parser cborParser.close(); } } 2. Data storage CBOR can be used to sequence the Java object to binary data and store it into files or databases, and restore Java objects from binary data.This is very useful in some scenarios that require efficient storage and retrieval.The following is an example of using the Jackson library for CBOR serialization and desertileization: import com.fasterxml.jackson.core.JsonProcessingException; import com.fasterxml.jackson.databind.ObjectMapper; import com.fasterxml.jackson.dataformat.cbor.CBORFactory; import java.io.File; import java.io.IOException; import java.util.HashMap; import java.util.Map; public class CborExample { public static void main(String[] args) throws IOException { // Create Java objects that need to be serialized Map<String, Object> data = new HashMap<>(); data.put ("name", "Li Si"); data.put("age", 30); // Create a CBOR factory and object maper CBORFactory cborFactory = new CBORFactory(); ObjectMapper objectMapper = new ObjectMapper(cborFactory); // Serialized Java objects are CBOR data and write files File file = new File("data.cbor"); objectMapper.writeValue(file, data); // Reverse serialization CBOR data is Java object Map<String, Object> restoredData = objectMapper.readValue(file, Map.class); // Print the restored java object System.out.println ("Restore Java object:" + RESTOREDDATA); } } Through the above examples, we can see the use scenarios of CBOR in the Java class library, including network communication and data storage.CBOR, as a compact and efficient binary data, can improve the efficiency of data transmission. At the same time, there are many libraries that support CBOR in Java that can simplify the encoding process.CBOR is a very useful tool for the application scenario that needs to process binary data.