获取沙箱环境签名key接口报错

"mch_id" is required. "sign" is required. "nonce_str" is required
明明是有值的
`
<mch_id>3129345678</mch_id>
<nonce_str>1749114345872</nonce_str>
202524F6AF0E4AFA225F96CB34822492

`

版本环境

`
com.github.binarywang
weixin-java-pay
4.7.0

`

大概原因

`httpPost.setEntity(createEntry(requestStr));
private static StringEntity createEntry(String requestStr) {
return new StringEntity(requestStr, ContentType.create("application/json", StandardCharsets.UTF_8));
}

String url = "https://api.mch.weixin.qq.com/xdc/apiv2getsignkey/sign/getsignkey";
String responseContent = this.post(url, request.toXML(), false);
请求接口getsignkey需要xml的格式，而post里面设置header又变成了application/json，这样传递数据就不被识别？

`

报错日志

`2025-06-05 17:05:46.107 INFO 10512 --- [nio-8080-exec-5] c.g.b.w.s.i.WxPayServiceApacheHttpImpl :
【请求地址】：https://api.mch.weixin.qq.com/xdc/apiv2getsignkey/sign/getsignkey
【请求数据】：
<mch_id>3129345678</mch_id>
<nonce_str>1749114345872</nonce_str>
202524F6AF0E4AFA225F96CB34822492

【响应数据】：
<return_code></return_code>
<return_msg></return_msg>

2025-06-05 17:05:46.122 ERROR 10512 --- [nio-8080-exec-5] c.g.b.w.b.r.WxPaySandboxSignKeyResult :
结果业务代码异常，返回结果：{return_msg="mch_id" is required. "sign" is required. "nonce_str" is required, return_code=FAIL},
返回代码：FAIL，返回信息："mch_id" is required. "sign" is required. "nonce_str" is required
2025-06-05 17:05:46.125 ERROR 10512 --- [nio-8080-exec-5] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is WxPayException(customErrorMsg=null, returnCode=FAIL, returnMsg="mch_id" is required. "sign" is required. "nonce_str" is required, resultCode=null, errCode=null, errCodeDes=null, xmlString=
<return_code></return_code>
<return_msg></return_msg>
)] with root cause

com.github.binarywang.wxpay.exception.WxPayException: 返回代码：[FAIL]，返回信息：["mch_id" is required. "sign" is required. "nonce_str" is required]，微信返回的原始报文：

<return_code></return_code>
<return_msg></return_msg>

at com.github.binarywang.wxpay.exception.WxPayException$Builder.build(WxPayException.java:207) ~[weixin-java-pay-4.7.5-20250529.111829.jar:na]
at com.github.binarywang.wxpay.exception.WxPayException.from(WxPayException.java:99) ~[weixin-java-pay-4.7.5-20250529.111829.jar:na]
at com.github.binarywang.wxpay.bean.result.BaseWxPayResult.checkResult(BaseWxPayResult.java:392) ~[weixin-java-pay-4.7.5-20250529.111829.jar:na]
at com.github.binarywang.wxpay.service.impl.BaseWxPayServiceImpl.getSandboxSignKey(BaseWxPayServiceImpl.java:1236) ~[weixin-java-pay-4.7.5-20250529.111829.jar:na]
at com.github.binarywang.demo.wx.pay.controller.WxPayController.getSandboxSignKey(WxPayController.java:363) ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.15.jar:5.3.15]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.56.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.15.jar:5.3.15]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.56.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardContextValve.__invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:41002) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1732) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at java.base/java.lang.Thread.run(Thread.java:842) ~[na:na]
`