springBoot整合微信支付V3 jsapi

目录

前端调用后端接口发起微信支付订单

发起成功后返回签名等信息给前端调起支付

支付成功后回调支付结果通知

---

前端调用后端接口发起微信支付订单

1、引入Maven坐标

<!-- 微信支付api v3 -->
<dependency>
   <groupId>com.github.wechatpay-apiv3</groupId>
   <artifactId>wechatpay-apache-httpclient</artifactId>
   <version>0.4.9</version>
</dependency>

2、配置文件

# 微信支付相关参数
# 商户号
wxpay.mch-id=1558950191
# 商户API证书序列号
wxpay.mch-serial-no=34345964330B66427E0D3D28826C4993C77E631F

# 商户私钥文件
wxpay.private-key-path=apiclient_key.pem
# APIv3密钥
wxpay.api-v3-key=UDuLFDcmy5Eb6o0nTNZdu6ek4DDh4K8B
# APPID
wxpay.appid=wx74862e0dfcf69954
# 微信服务器地址
wxpay.domain=https://api.mch.weixin.qq.com
# 接收结果通知地址
# 回调地址
wxpay.notify-domain=https://500c-219-143-130-12.ngrok.io

# APIv2密钥
wxpay.partnerKey: T6m9iK73b0kn9g5v426MKfHQH7X8rKwb

3、配置类  WxPayConfig

package com.tuimi.zxdt.wxpay.config;

import com.wechat.pay.contrib.apache.httpclient.WechatPayHttpClientBuilder;
import com.wechat.pay.contrib.apache.httpclient.auth.PrivateKeySigner;
import com.wechat.pay.contrib.apache.httpclient.auth.Verifier;
import com.wechat.pay.contrib.apache.httpclient.auth.WechatPay2Credentials;
import com.wechat.pay.contrib.apache.httpclient.auth.WechatPay2Validator;
import com.wechat.pay.contrib.apache.httpclient.cert.CertificatesManager;
import com.wechat.pay.contrib.apache.httpclient.exception.HttpCodeException;
import com.wechat.pay.contrib.apache.httpclient.exception.NotFoundException;
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.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.charset.StandardCharsets;
import java.security.GeneralSecurityException;
import java.security.PrivateKey;

/**
 * @description: 微信配置
 * @author: HK
 * @since: 2024/9/26 11:46
 */
@Configuration
@PropertySource("classpath:config/wxPay.application") //读取配置文件
@ConfigurationProperties(prefix="wxpay") //读取wxpay节点
@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;

    // APIv2密钥
    private String partnerKey;

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

        try {
            return PemUtil.loadPrivateKey(new FileInputStream(filename));
        } catch (FileNotFoundException e) {
            throw new RuntimeException("私钥文件不存在", e);
        }
    }

    /**
     * 获取签名验证器
     * @return
     */
    @Bean
    public Verifier 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);

        // 获取证书管理器实例
        CertificatesManager certificatesManager = CertificatesManager.getInstance();

        try {
            // 向证书管理器增加需要自动更新平台证书的商户信息
            certificatesManager.putMerchant(mchId, wechatPay2Credentials, apiV3Key.getBytes(StandardCharsets.UTF_8));
        } catch (IOException | GeneralSecurityException | HttpCodeException e) {
            e.printStackTrace();
        }

        try {
            return certificatesManager.getVerifier(mchId);
        } catch (NotFoundException e) {
            e.printStackTrace();
            throw new RuntimeException("获取签名验证器失败");
        }


        // 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(Verifier 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;