MD5加密代码

public class MD5 {public static String Md5(String plainText) {try {MessageDigest md = MessageDigest.getInstance("MD5");md.update(plainText.getBytes());byte b[] = md.digest();int i;StringBuffer buf = new StringBuffer("");for (int offset = 0; offset < b.length; offset++) {i = b[offset];if (i < 0)i += 256;if (i < 16)buf.append("0");buf.append(Integer.toHexString(i));}return buf.toString();} catch (NoSuchAlgorithmException e) {// TODO Auto-generated catch blocke.printStackTrace();}return null;}}