微信的退款结果通知微信的退款结果通知，用过的都说好（PS:懂的都懂）代码是抄人家的，改了写无关紧要的地方，不算原创参考链

微信的退款结果通知，用过的都说好（PS:懂的都懂）
代码是抄人家的，改了写无关紧要的地方，不算原创参考链接：<www.cnblogs.com/qqzhulu/p/1…>

<dependency>
  <groupId>org.bouncycastle</groupId>
  <artifactId>bcprov-jdk15on</artifactId>
  <version>1.63</version>
</dependency>

import org.bouncycastle.jce.provider.BouncyCastleProvider;
import org.springframework.util.DigestUtils;

import javax.crypto.Cipher;
import javax.crypto.SecretKey;
import javax.crypto.spec.SecretKeySpec;
import java.security.Security;
import java.util.Base64;

//脑瘫微信支付
public class NTWXZF {
    /**
     * 微信退款通知解码
     *  <p>
     *  解密步骤如下：
     * （1）对加密串A做base64解码，得到加密串B
     * （2）对商户key做md5，得到32位小写key* ( key设置路径：微信商户平台(pay.weixin.qq.com)-->账户设置-->API安全-->密钥设置 )
     * （3）用key*对加密串B做AES-256-ECB解密（PKCS7Padding）
     * @param reqInfoSecret
     * @param key
     * @return
     */
    public static String getRefundDecrypt(String reqInfoSecret, String key) {
        String result = "";
        try {
            Security.addProvider(new BouncyCastleProvider());
            byte[] bytes = Base64.getDecoder().decode(reqInfoSecret);
            String md5key = DigestUtils.md5DigestAsHex(key.getBytes()).toLowerCase();
            SecretKey secretKey = new SecretKeySpec(md5key.getBytes(), "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS7Padding", "BC");
            cipher.init(Cipher.DECRYPT_MODE, secretKey);
            byte[] resultbt = cipher.doFinal(bytes);
            result = new String(resultbt);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 解密测试
     * @param args
     */
    public static void main(String[] args) {
        String A = "cbRfjwOKrLQCOjAU0v1Ac6cDJQhK6349ngVplZHLe010obV59BJ75z05eUzG+Um3Zk" +
                "9WxNO6jtk60bBDkMLmf4dZk41wSbyx/GiNNcRp3g0GdUMjGjhlyJgMAKiLbmVwcPEQnOo" +
                "ikcCbwGd0VmOdWcTk67kDlE4ssYW6pgBXp5bSBVotuar2Wxi0z20HGgsz7dcIVELP9+Jf" +
                "GwuiVV9xkhO8sPbEO4SIO2qhkRQ0QzbDYgn9gU1Iprzv6wGxFh+Bm/lJWuiBGwhFCT2fq" +
                "1xEF1nDPEyW3LOWq4daCegXpvTXoXLZp9Xp6zcdxiDCsLgj8yj+q7ZNmVNt1vTUR94ZQA" +
                "I1UAtCqK+1dI89DZdbifU7o0fVm/9WQqjcOIo4WemUJU7WfCsyHXBVvx8lZezoQc5ZGZO" +
                "qTEZJCVKV6OF5iqvlNnZJ1byPg7BfHZnmbIjdETFMIOkq3oPicshnNlVZ9g08DvesDZzG" +
                "/KJzI8NBMFfXNMjSJyuemsZ/0jFJRtKDOWoCQetWox+mORa5BPrMwvibTLkPZL0okvnyr" +
                "JgFwGtE4BFTdnN/+cfuUISXMTbeZv6UjRJwD9y8B+wi4wTSUC1QXjlZEkV+RgBNnJD/n1" +
                "3NWUK1nlrwev/RHLsgjoMSYnF0mYec8g1BCyW0POcp4iEDaRVMrjQnACyyeMncSxA+Kaw" +
                "doFEOqMuAITv3B0Q9iZOTpI7yqnpquWiphXMuKovJgLp4vnPqerMMthTeaQ/rfVVO/U6Z" +
                "4K/heTZKT2Y0y7kQP2GS+r/N5Qvu+J0sihJ8opoZ0AJ7ktwGrzcmkIq/DCCtAfgdAT8x3" +
                "rtSXA4f8pb7WqFssdGRqgzMZR1jlcz3LD5+Du+BWK5QmyCeynywd9b6s7oYdyU0aI75Lr" +
                "T5EBOtEHAMGi2rmwb1X2wlEd3g4gCr2l1EEA4dUTdhsqynG0w64VHWJkvJgTOdmzMPWYk" +
                "sLu463qcy6dN44WuNBG0aw7uEQQIUXeRhDEwCBQVmzXNLzwQ6wHv6O9j7yvkvZll3SuGw" +
                "7bbsfdSdAfQkJkLCj/MHuEKUauiV0mQS/2M=";
        String key = "02a86cb980b1237eaa77fb86adf64657";
        System.out.println(A);
        System.out.println(key);
        String B = getRefundDecrypt(A, key);
        System.out.println(B);
    }
}