md5加密java实现模板

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

import Decoder.BASE64Encoder;

public class md5test {
public static void main(String[] args) throws NoSuchAlgorithmException, UnsupportedEncodingException {
String payload="qwrt";
MessageDigest md5 = MessageDigest.getInstance("MD5");
BASE64Encoder base64en = new BASE64Encoder();
byte[] bytes=md5.digest(payload.getBytes("utf-8"));
final char[] HEX_DIGITS = "0123456789ABCDEF".toCharArray();
StringBuilder ret = new StringBuilder(bytes.length * 2);
for (int i=0; i<bytes.length; i++) {
ret.append(HEX_DIGITS[(bytes[i] >> 4) & 0x0f]);
ret.append(HEX_DIGITS[bytes[i] & 0x0f]);
}
String newstr=ret.toString();
System.out.println(newstr.toLowerCase());

}
}