Java tutorial
//package com.java2s; /* * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import java.math.BigInteger; import java.security.MessageDigest; import java.security.NoSuchAlgorithmException; public class Main { public static String md5(String input) { String result = input; if (input != null) { try { MessageDigest md = MessageDigest.getInstance("MD5"); md.update(input.getBytes()); BigInteger hash = new BigInteger(1, md.digest()); result = hash.toString(16); if ((result.length() % 2) != 0) { result = "0" + result; } } catch (NoSuchAlgorithmException e) { e.printStackTrace(); } } return result; } }