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();
				 	}
				
				    
				}