import java.security.MessageDigest; public class EncryptionKit { public static String md5Encrypt(String srcStr){ return encrypt("MD5", srcStr); } public static String sha1Encrypt(String srcStr){ return encrypt("SHA-1", srcStr); } public static String sha256Encrypt(String srcStr){ return encrypt("SHA-256", srcStr); } public static String sha384Encrypt(String srcStr){ return encrypt("SHA-384", srcStr); } public static String sha512Encrypt(String srcStr){ return encrypt("SHA-512", srcStr); } public static String encrypt(String algorithm, String srcStr) { try { StringBuilder result = new StringBuilder(); MessageDigest md = MessageDigest.getInstance(algorithm); byte[] bytes = md.digest(srcStr.getBytes("utf-8")); for (byte b :bytes) { String hex = Integer.toHexString(b&0xFF); if (hex.length() == 1) result.append("0"); result.append(hex); } return result.toString(); } catch (Exception e) { throw new RuntimeException(e); } } }