MD5加密工具类

import java.math.BigInteger;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;

public class MD5Utils {

/** */

public static String md5(String plainText) { byte[] secretBytes = null;

try { secretBytes = MessageDigest.getInstance("md5").digest( plainText.getBytes());          } catch (NoSuchAlgorithmException e) {

throw new RuntimeException("找不到md5算法");

} String md5code = new BigInteger(1, secretBytes).toString(16); for (int i = 0; i < 32 - md5code.length(); i++) {

md5code = "0" + md5code;

}

return md5code;

}