2 3 import java.security.MessageDigest; 4 5 public class MD5Encoder { 6 7 public static String encode(String string) throws Exception { 8 byte[] hash = MessageDigest.getInstance("MD5").digest(string.getBytes("UTF-8")); 9 StringBuilder hex = new StringBuilder(hash.length * 2); 10 for (byte b : hash) { 11 if ((b & 0xFF) < 0x10) { 12 hex.append("0"); 13 } 14 hex.append(Integer.toHexString(b & 0xFF)); 15 } 16 return hex.toString(); 17 } 18 }