package com.usky.utils;

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

public class MD5Util {
	public final static String MD5(String s){
		char hexDigits[] ={'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
		try{
			byte[] btInput = s.getBytes();
			MessageDigest mdInst = MessageDigest.getInstance("MD5");
			mdInst.update(btInput);
			byte[] md = mdInst.digest();
			int j = md.length;
			char str[] = new char[j*2];
			int k = 0;
			for(int i=0;i<j;i++){
				byte byte0 = md[i];
				str[k++] = hexDigits[byte0 >>> 4 & 0xf];
				str[k++] = hexDigits[byte0 & 0xf];
			}
			return new String(str);
		} catch (Exception e){
			return null;
		}
	}
	public static String EncoderByMd5(String str) throws NoSuchAlgorithmException, UnsupportedEncodingException{
		byte[] secretBytes = null; 
		MessageDigest md5=MessageDigest.getInstance("MD5");
		 md5.update(str.getBytes());
		 secretBytes = md5.digest();
		 String newstr = new BigInteger(1,secretBytes).toString(16);
		 for(int i=0;i<32-newstr.length();i++)
			 newstr = "0"+newstr;
		 return newstr;
	}
}