MD5加密工具 MD5Utils
使用MD5对密码进行加密和加盐
1 public class MD5Utils { 2 private static final int SIGNUM = 1; 3 /** 4 * hex值 5 */ 6 private static final int HEX_FLAG = 16; 7 /** 8 * 签名的长度 9 */ 10 private static final int SIGN_LENGTH = 32; 11 /** 12 * 填充值 13 */ 14 private static final String FILL_CHAR = "0"; 15 /** 16 * md5 32位加密方法 17 * 18 * @param input 19 * @return 20 */ 21 public static String getMd5(String input) { 22 try { 23 MessageDigest md = MessageDigest.getInstance("MD5"); 24 byte[] messageDigest = md.digest(input.getBytes(Charset.forName("UTF-8"))); 25 BigInteger number = new BigInteger(SIGNUM, messageDigest); 26 String hashtext = number.toString(HEX_FLAG); 27 while (hashtext.length() < SIGN_LENGTH) { 28 hashtext = FILL_CHAR + hashtext; 29 } 30 return hashtext.toUpperCase(); 31 } catch (NoSuchAlgorithmException e) { 32 throw new RuntimeException(e); 33 } 34 } 35 36 public static void main(String[] args) { 37 38 // 方式一: 使用自定义的MD5加密工具类 39 String password = MD5Utils.getMd5("abc123ABC"); 40 System.out.println("password:"+ password); 41 42 // 加盐,随机生成6位数字和字母混合的字符串 43 String salt = RandomStringUtils.randomAlphanumeric(6); 44 System.out.println("salt:" + salt); 45 46 String saltPassword = MD5Utils.getMd5("abc123ABC" + salt); 47 System.out.println("saltPassword:" + saltPassword); 48 49 // 方式二: 使用springboot自带的MD5加密封装类DigestUtils 50 String pwd = DigestUtils.md5DigestAsHex("abc123ABC".getBytes()); 51 System.out.println("pwd:" + pwd.toUpperCase()); 52 } 53 }
输出结果: