// 导入相关包 import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class MD5Util { // 生成MD5摘要 public static String generateMD5(String input) { try { MessageDigest md = MessageDigest.getInstance("MD5"); md.update(input.getBytes()); byte[] digest = md.digest(); StringBuilder sb = new StringBuilder(); for (byte b : digest) { sb.append(String.format("%02x", b & 0xff)); } return sb.toString(); } catch (NoSuchAlgorithmException e) { e.printStackTrace(); return null; } } public static void main(String[] args) { String input = "Hello, World!"; String md5 = generateMD5(input); System.out.println("MD5摘要: " + md5); } }