import org.slf4j.Logger; import org.slf4j.LoggerFactory;

import java.security.MessageDigest;

public class Md5Generation { private static final Logger LOG = LoggerFactory.getLogger(Md5Generation.class);

/** * 生成MD5 * [@param](http://my.oschina.net/u/2303379) login   TShop登录名 * [@param](http://my.oschina.net/u/2303379) token   TShop token * [@param](http://my.oschina.net/u/2303379) key     时间毫秒数 * [@return](http://my.oschina.net/u/556800) */public static String getKeyedDigest(String login, String token, String key) {    try {        String temp = login + token + key;        MessageDigest md5 = MessageDigest.getInstance("MD5");        byte[] bytes = md5.digest(temp.getBytes());        return byteToHex(bytes);    } catch (Exception e) {        LOG.info("Md5Generation : generation MD5 Failed. ");    }    return null;}public static String byteToHex(byte[] bits) {    if (bits == null) {        return null;    }    StringBuffer hex = new StringBuffer(bits.length * 2);    for (int i = 0; i < bits.length; i++) {        if (((int) bits[i] & 0xff) < 0x10) {            hex.append("0");        }        hex.append(Integer.toString((int) bits[i] & 0xff, 16));    }    return hex.toString();}

}