1.通過對上傳附件接口進行抓包，獲取的信息如下：
2.在jmeter腳本中添加http請求，並添加http請求頭信息如下：
3.在http請求中添加上傳附件的內容如下，由於我上傳的是excel,所以MIME類型中輸入：application/vnd.ms-excel：
4.保存腳本后，運行腳本，添加擦看結果樹，觀察響應結果，如下：
"msg":"系統內部錯誤","path":"//sign/uploadFile/H014201901230027","stack":"com.huaxia.cai.center.loan.exception.BaseControllerException: 系統內部錯誤\n\tat com.huaxia.cai.center.loan.controller.ApplySignController.upLoadCallFiles(ApplySignController.java:558)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)\n\tat sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)\n\tat sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)\n\tat java.lang.reflect.Method.invoke(Method.java:498)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:209)\n\tat org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136)\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:877)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal_aroundBody0(RequestMappingHandlerAdapter.java:783)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter$AjcClosure1.run(RequestMappingHandlerAdapter.java:1)\n\tat org.aspectj.runtime.reflect.JoinPointImpl.proceed(JoinPointImpl.java:149)\n\tat com.qbao.cat.plugin.DefaultPluginTemplate.proxyCollector(DefaultPluginTemplate.java:71)\n\tat com.qbao.cat.plugin.DefaultPluginTemplate.doAround(DefaultPluginTemplate.java:64)\n\tat com.qbao.cat.plugin.remote.http.HttpServerPluginTemplate.doAround(HttpServerPluginTemplate.java:29)\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:765)\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)\n\tat org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:991)\n\tat org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:925)\n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:974)\n\tat org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:877)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:661)\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:851)\n\tat javax.servlet.http.HttpServlet.service(HttpServlet.java:742)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:109)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200)\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:496)\n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)\n\tat org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)\n\tat org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790)\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1468)\n\tat org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)\n\tat java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)\n\tat org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)\n\tat java.lang.Thread.run(Thread.java:748)\n","code":"system_failed"}
解決方案如下：
jmeter上傳附件失敗，正確添加了頭信息和body信息后，仍然上傳失敗，后來發現是HTTP信息頭管理器中，設置的Content-Type：application/json，
而上傳附件請求中Content-Type:multipart/form-data,JMeter在寫API的case時,經常會用到全局性header manager，因此會覆蓋 上傳附件請求中的Content-Type，
導致附件上傳失敗。
解決的方法是：在上傳附件的請求中添加BeanShell PreProcessor，在BeanShell PreProcessor中添加下面的代碼：
sampler.getHeaderManager().removeHeaderNamed("Content-Type");
如果接下來的case還想再加回content-type=application/json, BeanShell里面代碼:
import org.apache.jmeter.protocol.http.control.Header;
sampler.getHeaderManager().add(new Header("Content-Type","application/json"));