package com.jshoperx.action.backstage.pay.thirdpartyplatform.alipay;
import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
/**
* 功能:支付宝MD5加密处理核心文件,不需要修改
* 版本:3.1
* 修改日期:2010-11-01
* 说明:
* 以下代码只是为了方便商户测试而提供的样例代码,商户可以根据自己网站的需要,按照技术文档编写,并非一定要使用该代码。
* 该代码仅供学习和研究支付宝接口使用,只是提供一个
* */
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'};
/**
* 对字符串进行MD5加密
*
* @param text
* 明文
*
* @return 密文
*/
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.input_charset)); //注意改接口是按照指定编码形式签名
} 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;
}
}