WXPayConfig里的bug

参考：Java 微信支付 继承 WXPayConfig 类 getWXPayDomain() 方法 重写 遗漏
Java开发微信支付使用wxpay-sdk中遇到的坑（一）

MyWxPayConfig配置类代码，应该是extends继承，而不是implement实现

package com.tj.qywx.config;
import com.github.wxpay.sdk.IWXPayDomain;
import com.github.wxpay.sdk.WXPayConfig;
import com.tj.base.service.BaseNumvarService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import java.io.*;
public class MyWxPayConfig extends WXPayConfig {
    @Autowired
    private BaseNumvarService baseNumvarService;
    private byte[] certData;
    @Value("${cert.path}") //读取yaml文件里设置的地址信息
    private String path;
    public MyWxPayConfig() throws Exception {
        String certPath = this.path;
        File file = new File(certPath);
        InputStream certStream = new FileInputStream(file);
        this.certData = new byte[(int) file.length()];
        certStream.read(this.certData);
        certStream.close();
    }
    @Override
    public String getAppID() {
        return baseNumvarService.getCorpid();
    }
    @Override
    public String getMchID() {
        return baseNumvarService.getMchId();
    }
    @Override
    public String getKey() {
        return baseNumvarService.getAPIv2();
    }
    @Override
    public InputStream getCertStream() {
        ByteArrayInputStream certBis = new ByteArrayInputStream(this.certData);
        return certBis;
    }
    @Override
    public IWXPayDomain getWXPayDomain() {
        return null;
    }
}