com.github.xiaoyuge5201.qywx.WxSHA1 Maven / Gradle / Ivy
/**
* 对公众平台发送给公众账号的消息加解密示例代码.
*
* @copyright Copyright (c) 1998-2014 Tencent Inc.
*/
// ------------------------------------------------------------------------
package com.github.xiaoyuge5201.qywx;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import java.security.MessageDigest;
import java.util.Arrays;
/**
* SHA1 class
*
* 计算公众平台的消息签名接口.
*/
public class WxSHA1 {
private static Logger log = LoggerFactory.getLogger(WxSHA1.class);
@Value("${spring.application.name}")
private static String systemName;
/**
* 用SHA1算法生成安全签名
*
* @param token 票据
* @param timestamp 时间戳
* @param nonce 随机字符串
* @param encrypt 密文
* @return 安全签名
*/
public static String getSHA1(String token, String timestamp, String nonce, String encrypt) {
try {
String[] array = new String[]{token, timestamp, nonce, encrypt};
StringBuffer sb = new StringBuffer();
// 字符串排序
Arrays.sort(array);
for (int i = 0; i < 4; i++) {
sb.append(array[i]);
}
String str = sb.toString();
// SHA1签名生成
MessageDigest md = MessageDigest.getInstance("SHA-1");
md.update(str.getBytes());
byte[] digest = md.digest();
StringBuffer hexstr = new StringBuffer();
String shaHex = "";
for (int i = 0; i < digest.length; i++) {
shaHex = Integer.toHexString(digest[i] & 0xFF);
if (shaHex.length() < 2) {
hexstr.append(0);
}
hexstr.append(shaHex);
}
return hexstr.toString();
} catch (Exception e) {
log.error("系统名称:" + systemName + ",信息:" + e.toString(), e);
return null;
}
}
}