下面是service代码片段:

   log.info("生成订单");

   //生成订单
   OrderInfo orderInfo = new OrderInfo();
   orderInfo.setTitle("test");
   orderInfo.setOrderNo(OrderNoUtils.getOrderNo());
   orderInfo.setProductId(productId);
   orderInfo.setTotalFee(66655489);

   log.info("调用统一下单API");

//   HttpPost httpPost = new HttpPost(wxPayConfig.getDomain().concat(WxApiType.NATIVE_PAY.getType()));
   HttpPost httpPost = new HttpPost("https://api.mch.weixin.qq.com/v3/pay/transactions/jsapi");

   //请求body参数
   Gson gson = new Gson();
   Map paramsMap = new HashMap();
   paramsMap.put("appid", wxPayConfig.getAppid());
   paramsMap.put("mchid", wxPayConfig.getMchId());
   paramsMap.put("description", orderInfo.getTitle());
   paramsMap.put("out_trade_no", orderInfo.getOrderNo());
   paramsMap.put("notify_url", wxPayConfig.getNotifyDomain().concat(WxNotifyType.NATIVE_NOTIFY.getType()));


   Map amountMap = new HashMap();
   amountMap.put("total", orderInfo.getTotalFee());
   amountMap.put("currency", "CNY");

   paramsMap.put("amount", amountMap);

   //将参数转换成json字符串
   String jsonParams = gson.toJson(paramsMap);
   log.info("请求参数 ===> {}" + jsonParams);

   StringEntity entity = new StringEntity(jsonParams,"utf-8");
   entity.setContentType("application/json");
   httpPost.setEntity(entity);
   httpPost.setHeader("Accept", "application/json");

   //完成签名并执行请求
   CloseableHttpResponse response = wxPayClient.execute(httpPost);

   try {
       String bodyAsString = EntityUtils.toString(response.getEntity());//响应体
       int statusCode = response.getStatusLine().getStatusCode();//响应状态码
       if (statusCode == 200) { //处理成功
           log.info("成功, 返回结果 = " + bodyAsString);
       } else if (statusCode == 204) { //处理成功，无返回Body
           log.info("成功");
       } else {
           log.info("Native下单失败,响应码 = " + statusCode+ ",返回结果 = " + bodyAsString);
           throw new IOException("request failed");
       }

以下是报错信息:

failed,resp code = 400,return body = {"code":"PARAM_ERROR","detail":{"location":"body","value":""},"message":"输入源“/body/payer”映射到字段“支付者”必填性规则校验失败，此字段为必填项"}

2024-03-22 12:27:53.284 ERROR 12000 --- [nio-8090-exec-7] o.a.c.c.C.[.[.[/].[dispatcherServlet]    : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception

java.io.IOException: request failed

at com.atguigu.service.impl.WxPayServiceImpl.nativePay(WxPayServiceImpl.java:68) ~[classes/:na]

at com.atguigu.controller.WxPayController.nativePay(WxPayController.java:30) ~[classes/:na]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_181]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_181]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_181]

at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_181]

at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:909) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:652) ~[tomcat-embed-core-9.0.41.jar:4.0.FR]

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.12.RELEASE.jar:5.2.12.RELEASE]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.41.jar:4.0.FR]