137 lines
5.3 KiB
Java
137 lines
5.3 KiB
Java
package com.heyu.api.jsapi;
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// 引用微信支付工具库，参考：https://pay.weixin.qq.com/doc/v3/merchant/4014931831
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import com.heyu.api.jsapi.dto.CommonAmountInfo;
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import com.heyu.api.jsapi.dto.DirectAPIv3JsapiPrepayRequest;
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import com.heyu.api.jsapi.dto.DirectAPIv3JsapiPrepayResponse;
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import com.heyu.api.jsapi.dto.JsapiReqPayerInfo;
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import com.heyu.api.jsapi.utils.PemUtil;
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import lombok.SneakyThrows;
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import lombok.extern.slf4j.Slf4j;
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import okhttp3.*;
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import org.springframework.beans.factory.annotation.Value;
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import org.springframework.stereotype.Component;
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import org.springframework.util.Base64Utils;
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import java.io.IOException;
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import java.io.UncheckedIOException;
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import java.nio.charset.StandardCharsets;
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import java.security.PrivateKey;
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import java.security.PublicKey;
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import java.security.Signature;
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/**
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* JSAPI下单
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*/
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@Component
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@Slf4j
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public class JsapiPrepay {
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private static String HOST = "https://api.mch.weixin.qq.com";
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private static String METHOD = "POST";
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private static String PATH = "/v3/pay/transactions/jsapi";
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@Value("${eb.config.weixin.pay.appid}")
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private String appid;
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@Value("${eb.config.weixin.pay.mchid}")
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private String mchid;
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private String certificateSerialNo;
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private PrivateKey privateKey;
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private String wechatPayPublicKeyId;
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private PublicKey wechatPayPublicKey;
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@Value("${eb.config.weixin.pay.notifyUrl}")
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private String notifyUrl;
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public JsapiPrepay() {
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}
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public JsapiPrepay(String mchid, String certificateSerialNo, String privateKeyFilePath, String wechatPayPublicKeyId, String wechatPayPublicKeyFilePath) {
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this.mchid = mchid;
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this.certificateSerialNo = certificateSerialNo;
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this.privateKey = WXPayUtility.loadPrivateKeyFromPath(privateKeyFilePath);
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this.wechatPayPublicKeyId = wechatPayPublicKeyId;
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this.wechatPayPublicKey = WXPayUtility.loadPublicKeyFromPath(wechatPayPublicKeyFilePath);
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}
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@SneakyThrows
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public static String getSign(String signatureStr, String privateKey) {
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String replace = privateKey.replace("\\n", "\n");
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PrivateKey merchantPrivateKey = PemUtil.loadPrivateKeyFromPath(replace);
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Signature sign = Signature.getInstance("SHA256withRSA");
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sign.initSign(merchantPrivateKey);
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sign.update(signatureStr.getBytes(StandardCharsets.UTF_8));
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return Base64Utils.encodeToString(sign.sign());
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}
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public DirectAPIv3JsapiPrepayResponse prePay(Long tradeOrderId,
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Long amount,
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String openid
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) {
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DirectAPIv3JsapiPrepayRequest request = new DirectAPIv3JsapiPrepayRequest();
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request.setAppid(appid);
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request.setMchid(mchid);
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request.setNotifyUrl(notifyUrl);
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request.setDescription(System.currentTimeMillis() + "");
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request.setOutTradeNo(tradeOrderId + "");
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request.setTimeExpire(WXPayUtility.generateExpireTime()); // 2025-11-05T21:02:16+08:00
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request.setAttach("自定义数据说明");
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request.setGoodsTag("WXG");
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request.setSupportFapiao(false);
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CommonAmountInfo commonAmountInfo = new CommonAmountInfo();
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commonAmountInfo.setTotal(amount);
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commonAmountInfo.setCurrency("CNY");
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request.setAmount(commonAmountInfo);
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JsapiReqPayerInfo payer = new JsapiReqPayerInfo();
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payer.setOpenid(openid);
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request.setPayer(payer);
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return doPay(request);
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}
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public DirectAPIv3JsapiPrepayResponse doPay(DirectAPIv3JsapiPrepayRequest request) {
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String uri = PATH;
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String reqBody = WXPayUtility.toJson(request);
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Request.Builder reqBuilder = new Request.Builder().url(HOST + uri);
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reqBuilder.addHeader("Accept", "application/json");
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reqBuilder.addHeader("Wechatpay-Serial", wechatPayPublicKeyId);
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reqBuilder.addHeader("Authorization", WXPayUtility.buildAuthorization(mchid, certificateSerialNo, privateKey, METHOD, uri, reqBody));
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reqBuilder.addHeader("Content-Type", "application/json");
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RequestBody requestBody = RequestBody.create(MediaType.parse("application/json; charset=utf-8"), reqBody);
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reqBuilder.method(METHOD, requestBody);
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Request httpRequest = reqBuilder.build();
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// 发送HTTP请求
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OkHttpClient client = new OkHttpClient.Builder().build();
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try (Response httpResponse = client.newCall(httpRequest).execute()) {
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String respBody = WXPayUtility.extractBody(httpResponse);
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log.info("JsapiPrepay respBody:{}", respBody);
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if (respBody != null) {
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}
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if (httpResponse.code() >= 200 && httpResponse.code() < 300) {
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// 2XX 成功，验证应答签名
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WXPayUtility.validateResponse(this.wechatPayPublicKeyId, this.wechatPayPublicKey, httpResponse.headers(), respBody);
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// 从HTTP应答报文构建返回数据
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return WXPayUtility.fromJson(respBody, DirectAPIv3JsapiPrepayResponse.class);
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} else {
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throw new WXPayUtility.ApiException(httpResponse.code(), respBody, httpResponse.headers());
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}
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} catch (IOException e) {
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throw new UncheckedIOException("Sending request to " + uri + " failed.", e);
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}
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}
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}
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