Here you can find the source of md5(String src)
public static String md5(String src)
//package com.java2s; import java.security.MessageDigest; public class Main { public static String md5(String src) { try {/* w ww . jav a 2 s . c om*/ StringBuffer buffer = new StringBuffer(); char[] chars = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' }; byte[] bytes = src.getBytes(); MessageDigest md = MessageDigest.getInstance("MD5"); byte[] targ = md.digest(bytes); System.out.println(targ.toString()); for (byte b : targ) { buffer.append(chars[(b >> 4) & 0x0F]); buffer.append(chars[b & 0x0F]); } return buffer.toString(); } catch (Exception e) { e.printStackTrace(); } return null; } }