代码如下

package com.polin.market.util;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("加密失败");		}		return new BigInteger(1, secretBytes).toString(16);	}}