将微信配置信息存到数据库并进行调用

package com.dataxai.web.core.config;

import com.alibaba.fastjson2.JSON;
import com.dataxai.web.domain.Wxpay;
import com.dataxai.web.mapper.WxpayMapper;
import com.wechat.pay.contrib.apache.httpclient.WechatPayHttpClientBuilder;
import com.wechat.pay.contrib.apache.httpclient.auth.*;
import com.wechat.pay.contrib.apache.httpclient.util.PemUtil;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.apache.http.impl.client.CloseableHttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.io.ClassPathResource;
import javax.annotation.PostConstruct;
import java.io.*;
import java.nio.charset.StandardCharsets;
import java.security.PrivateKey;


@Configuration
@Data //使用set方法将wxpay节点中的值填充到当前类的属性中
@Slf4j
public class WxPayConfig {

    // 商户号
    private String mchId;

    // 商户API证书序列号
    private String mchSerialNo;

    // 商户私钥文件
    private String privateKeyPath;

    // APIv3密钥
    private String apiV3Key;

    // APPID
    private String appid;

    // 微信服务器地址
    private String domain;

    // 接收结果通知地址
    private String notifyDomain;

    // 接收结果通知地址
    private String notifyDomainProd;

    // APIv2密钥
    private String partnerKey;

    @Autowired
    private WxpayMapper configMapper;

    @PostConstruct
    public void init() {
        log.info("初始化微信支付配置...");
        //从数据库获得配置信息
        Wxpay dbConfig = configMapper.getOne(1l);
        if (dbConfig != null) {
            this.mchId = dbConfig.getMchId();
            this.mchSerialNo = dbConfig.getMchSerialNo();
            this.privateKeyPath = dbConfig.getPrivateKeyPath(); // 设置私钥路径
            this.apiV3Key = dbConfig.getApiV3Key();
            this.appid = dbConfig.getAppId();
            this.domain = dbConfig.getDomain();
            this.notifyDomain = dbConfig.getNotifyDomain();
            this.notifyDomainProd = dbConfig.getNotifyDomainProd();
            this.partnerKey = dbConfig.getPartnerKey();

            log.info("微信支付配置已成功初始化: {}", JSON.toJSONString(dbConfig));
        } else {
            throw new IllegalStateException("未找到微信支付配置");
        }
    }


    /**
     * 获取商户的私钥文件
     * @param filename
     * @return
     */
    private PrivateKey getPrivateKey(String filename) {

        System.out.println("filename = "+filename);
        filename = "/config/"+filename;
        ClassPathResource resource = new ClassPathResource(filename);
        InputStream inputStream = null;
        try {
            inputStream = resource.getInputStream();
            return PemUtil.loadPrivateKey(inputStream);
        } catch (IOException e) {
            throw new RuntimeException("私钥文件不存在",e);
        }

    }

    /**
     * 获取签名验证器
     * @return
     */
    @Bean
    public ScheduledUpdateCertificatesVerifier getVerifier(){

        log.info("获取签名验证器");

        //获取商户私钥
        PrivateKey privateKey = getPrivateKey(privateKeyPath);

        //私钥签名对象
        PrivateKeySigner privateKeySigner = new PrivateKeySigner(mchSerialNo, privateKey);

        //身份认证对象
        WechatPay2Credentials wechatPay2Credentials = new WechatPay2Credentials(mchId, privateKeySigner);

        // 使用定时更新的签名验证器，不需要传入证书
        ScheduledUpdateCertificatesVerifier verifier = new ScheduledUpdateCertificatesVerifier(
                wechatPay2Credentials,
                apiV3Key.getBytes(StandardCharsets.UTF_8));

        return verifier;
    }


    /**
     * 获取http请求对象
     * @param verifier
     * @return
     */
    @Bean(name = "wxPayClient")
    public CloseableHttpClient getWxPayClient(ScheduledUpdateCertificatesVerifier verifier){

        log.info("获取httpClient");

        //获取商户私钥
        PrivateKey privateKey = getPrivateKey(privateKeyPath);

        WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
                .withMerchant(mchId, mchSerialNo, privateKey)
                .withValidator(new WechatPay2Validator(verifier));
        // ... 接下来，你仍然可以通过builder设置各种参数，来配置你的HttpClient

        // 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签，并进行证书自动更新
        CloseableHttpClient httpClient = builder.build();

        return httpClient;
    }

    /**
     * 获取HttpClient，无需进行应答签名验证，跳过验签的流程
     */
    @Bean(name = "wxPayNoSignClient")
    public CloseableHttpClient getWxPayNoSignClient(){

        //获取商户私钥
        PrivateKey privateKey = getPrivateKey(privateKeyPath);

        //用于构造HttpClient
        WechatPayHttpClientBuilder builder = WechatPayHttpClientBuilder.create()
                //设置商户信息
                .withMerchant(mchId, mchSerialNo, privateKey)
                //无需进行签名验证、通过withValidator((response) -> true)实现
                .withValidator((response) -> true);

        // 通过WechatPayHttpClientBuilder构造的HttpClient，会自动的处理签名和验签，并进行证书自动更新
        CloseableHttpClient httpClient = builder.build();

        log.info("== getWxPayNoSignClient END ==");

        return httpClient;
    }

}

mapper层和controller层省略