如何使用MessageDigest生成唯一ID

MessageDigest??Java???????????,???????????ID?????????????,??????MessageDigest????ID:

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class UniqueIDGenerator {

    public static String generateUniqueID(String input) {
        try {
            // ??MessageDigest??
            MessageDigest md = MessageDigest.getInstance("MD5");
            
            // ?????????????
            byte[] inputBytes = input.getBytes();
            
            // ????
            byte[] digest = md.digest(inputBytes);
            
            // ?????????????
            StringBuilder sb = new StringBuilder();
            for (byte b : digest) {
                sb.append(String.format("x", b));
            }
            
            return sb.toString();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static void main(String[] args) {
        String input = "Hello, world!";
        String uniqueID = generateUniqueID(input);
        System.out.println("Unique ID: " + uniqueID);
    }
}

??????,????MD5???????ID,????????????????????ID?????????????generateUniqueID??,?????????ID????