package com.zt.core.security;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.security.MessageDigest;
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/**
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* Md5加密方法
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*
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* @author jiayin
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*/
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public class Md5Utils
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{
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private static final Logger log = LoggerFactory.getLogger(Md5Utils.class);
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private static byte[] md5(String s)
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{
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MessageDigest algorithm;
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try
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{
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algorithm = MessageDigest.getInstance("MD5");
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algorithm.reset();
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algorithm.update(s.getBytes("UTF-8"));
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byte[] messageDigest = algorithm.digest();
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return messageDigest;
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}
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catch (Exception e)
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{
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log.error("MD5 Error...", e);
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}
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return null;
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}
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private static final String toHex(byte hash[])
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{
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if (hash == null)
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{
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return null;
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}
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StringBuffer buf = new StringBuffer(hash.length * 2);
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int i;
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for (i = 0; i < hash.length; i++)
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{
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if ((hash[i] & 0xff) < 0x10)
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{
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buf.append("0");
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}
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buf.append(Long.toString(hash[i] & 0xff, 16));
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}
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return buf.toString();
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}
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public static String hash(String s)
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{
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try
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{
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return new String(toHex(md5(s)).getBytes("UTF-8"), "UTF-8");
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}
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catch (Exception e)
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{
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log.error("not supported charset...{}", e);
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return s;
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}
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}
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}
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