MD5加密java，md5java

MD5加密java，md5java

MD5加密的处理如下：

import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SecurityUtil {
	public static String md5(String password) throws NoSuchAlgorithmException {
		MessageDigest md = MessageDigest.getInstance("MD5");
		md.update(password.getBytes());
		//BigInteger(1,md.digest()),其中1表示是正数，-1表示负数，0表示0
		return new BigInteger(1,md.digest()).toString(16);
	}
	
	public static String md5(String username,String password) throws NoSuchAlgorithmException {
		MessageDigest md = MessageDigest.getInstance("MD5");
		md.update(username.getBytes());
		md.update(password.getBytes());
		return new BigInteger(1,md.digest()).toString(16);
	}
}