Md5Encrypt.java

��package me.xhh.alipay.util;



import java.io.UnsupportedEncodingException;

import java.security.MessageDigest;

import java.security.NoSuchAlgorithmException;



import me.xhh.alipay.config.AlipayConfig;



/** 

* R����e/N�[�MD5R�[�Yth8_�e�N��N
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* rHg,�3.0

* O�e9e�g�2010-06-18

* ��f�

* N�NN�x
S�f/N:N�e�O�UFb7mK�Հc�O�v�h7O�N�x
�UFb7S�N�h9cn��]�Qz�v�����c	qgb�g/e�hcQ�,^v�^N[���Ou(��N�x
0

* ��N�x
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* */



public class Md5Encrypt {

	/**

	 * Used building output as Hex

	 */

	private static final char[] DIGITS = { '0', '1', '2', '3', '4', '5', '6',

			'7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };



	/**

	 * [�[W{&N2�ۈLMD5R�[�

	 * 

	 * @param text

	 *            fe�

	 * 

	 * @return [�e�

	 */

	public static String md5(String text) {

		MessageDigest msgDigest = null;



		try {

			msgDigest = MessageDigest.getInstance("MD5");

		} catch (NoSuchAlgorithmException e) {

			throw new IllegalStateException(

					"System doesn't support MD5 algorithm.");

		}



		try {

			msgDigest.update(text.getBytes(AlipayConfig.CharSet));    //l�ae9c�S�f/c	qgc[�x
_b_R�[�

 

		} catch (UnsupportedEncodingException e) {



			throw new IllegalStateException(

					"System doesn't support your  EncodingException.");



		}



		byte[] bytes = msgDigest.digest();



		String md5Str = new String(encodeHex(bytes));



		return md5Str;

	}



	public static char[] encodeHex(byte[] data) {



		int l = data.length;



		char[] out = new char[l << 1];



		// two characters form the hex value.

		for (int i = 0, j = 0; i < l; i++) {

			out[j++] = DIGITS[(0xF0 & data[i]) >>> 4];

			out[j++] = DIGITS[0x0F & data[i]];

		}



		return out;

	}



}