MD5加密使用方式

MD5 加密：

新建如下類，再需要的時候調用即可。

package com.fuying.assure.baseInfo.util;

import java.security.MessageDigest;

import sun.misc.BASE64Encoder;

/**@author hongk 2015/06/17
 * MD5加密
 * */
public class Md5Util {
	
	public static String md5Digest(String pwd){
		try {
			MessageDigest md5Code=
					MessageDigest.getInstance("md5");
			byte[] bytes=md5Code.digest(pwd.getBytes());
			
			BASE64Encoder base64=new BASE64Encoder();
			pwd=base64.encode(bytes);
			return pwd;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}
	

	public static String getMD5(String pwd){
		try {
			String s=null;
			char hexChar[] = { '0', '1', '2', '3', '4', '5', '6','7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
			MessageDigest md=MessageDigest.getInstance("md5");
			md.update(pwd.getBytes());
			byte[] bytes=md.digest();
			
			char result[] = new char[16*2];//返回32位字符串，每位是16進製表示
			int k=0;
			for(int i=0;i<16;i++){//字節轉換
				byte eByte=bytes[i];
				result[k++] = hexChar[eByte >>> 4 & 0xf];
				result[k++] = hexChar[eByte & 0xf];
			}
			s=new String(result);
			return s;
		} catch (Exception e) {
			e.printStackTrace();
			return null;
		}
	}
	
	public static void main(String[] args) {
		String str ="pass1234";
		System.out.println(getMD5(str));
	}
	
}