encrypt.java

基于mvc的java进销存系统

/*
 * Encrypt.java
 *
 * Created on 2007年5月24日, 下午2:49
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package MD5;

import java.security.MessageDigest;
import java.math.BigInteger;
/**
 *
 * @author 下雪天
 */
public class Encrypt {
    public static String toMD5(String password){
		MessageDigest digest;
		String algorithm = "MD5";
		try{
			digest = MessageDigest.getInstance(algorithm);
 			digest.update(password.getBytes());
			return byte2hex(digest.digest());
 		}catch (Exception e){
 			e.printStackTrace(System.err);
 			return null;
 		}
 	}
 	public static String byte2hex(byte[] b){
 		String result="";
 		String hex="";
 		for(int n = 0;n < b.length;n++){
 		hex=(java.lang.Integer.toHexString(b[n] & 0XFF));
 		if (hex.length()==1) result=result+"0"+hex;
 		else result=result+hex;
 		}
		return result.toLowerCase();
 	}

    
}