passwordservice.java

工厂版本管理系统,STRUTS2框架,用于管理商品的版本,便于有效的控制版本

package com.bluesky.elecall.service;

import java.security.MessageDigest;

import sun.misc.BASE64Encoder;

public class PasswordService {
	private static PasswordService instance;

	private PasswordService() {
	}

	public synchronized String encrypt(String plaintext) {
		MessageDigest md = null;

		try {
			md = MessageDigest.getInstance("SHA");
			md.update(plaintext.getBytes("UTF-8")); // step 3
		} catch (Exception e) {			
			e.printStackTrace();
		} // step 2

		byte raw[] = md.digest(); // step 4
		
		String hash = (new BASE64Encoder()).encode(raw); // step 5
		return hash; // step 6
	}

	public static synchronized PasswordService getInstance() // step 1
	{
		if (instance == null) {
			return new PasswordService();
		} else {
			return instance;
		}
	}
}