Java uses Apache Commons Codec to implement CRC verification for detecting the integrity of data transmission

The Maven coordinates of the dependent class library are: <dependency> <groupId>commons-codec</groupId> <artifactId>commons-codec</artifactId> <version>1.15</version> </dependency> Apache Commons Codec is an open source Java class library that provides various encoding and decoding methods, including basic binary, hexadecimal, URL, Base64, etc. It also provides tool classes for implementing different hash and validation algorithms, such as MD5, SHA-1, CRC, etc. The following is a complete example of using Apache Commons Codec to implement CRC verification: import org.apache.commons.codec.digest.CRC32; public class CRC32Checksum { public static void main(String[] args) { //Data to calculate checksum byte[] data = "Hello, World!".getBytes(); //Create CRC32 object CRC32 crc32 = new CRC32(); //Update checksum crc32.update(data); //Obtain checksum value long checksum = crc32.getValue(); System.out.println("CRC32 Checksum: " + checksum); } } In the above example, we use the 'CRC32' class to calculate the CRC checksum of the data. Firstly, create a 'CRC32' object, then use the 'update' method to add data to the checksum, and finally obtain the checksum value through the 'getValue' method. Summary: This article introduces how to use Apache Commons Codec to implement CRC verification to detect the integrity of data transmission. By introducing relevant Maven dependencies and using the 'CRC32' class, we can conveniently calculate the CRC checksum of the data.