Angular 服务器中出现错误500

我正在尝试将excell从Angular2发送到服务器SpringBoot，但收到错误500:

HTML:

在我的服务中，我配置标题并发送到SpringBoot

sendFile(url, myFile) {
    let headers = new Headers();
    headers.append('Content-Type', 'multipart/form-data');
    headers.append('Accept', 'application/json');

    return this.http2.post(url,   myFile , { headers: headers });
  }

最后在我的SpringBoot中：

@RestController
@RequestMapping(value = { "/ml" })
@CrossOrigin
public class MyFile{

        @RequestMapping(method = RequestMethod.POST, value = "/insert" , headers = "Content-Type= multipart/form-data", produces = MediaType.APPLICATION_JSON_VALUE)
        @ResponseBody
        public String insert(@RequestBody MultipartFile multipart) {

            System.out.println("file" + multipart);
            return "SpringBoot";

        }
}

最后，我在HTML中发现错误：

穿上我的弹力靴：

org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
    at org.apache.tomcat.util.http.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:831) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.tomcat.util.http.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:256) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:280) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.Request.parseParts(Request.java:2869) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.Request.parseParameters(Request.java:3216) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.Request.getParameter(Request.java:1137) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java:381) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:75) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_171]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_171]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at java.lang.Thread.run(Unknown Source) [na:1.8.0_171]

org.apache.tomcat.util.http.fileupload.FileUploadException:请求被拒绝，因为未找到多部分边界
在org.apache.tomcat.util.http.fileupload.FileUploadBase$fileiteratorimpl.（FileUploadBase.java:831）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.tomcat.util.http.fileupload.FileUploadBase.getItemIterator（FileUploadBase.java:256）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest（FileUploadBase.java:280）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.connector.Request.parseParts（Request.java:2869）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.connector.Request.parseParameters（Request.java:3216）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.connector.Request.getParameter（Request.java:1137）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.connector.RequestFacade.getParameter（RequestFacade.java:381）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.springframework.web.filter.hiddenhttmpmethodfilter.doFilterInternal（hiddenhttmpmethodfilter.java:75）~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal（CharacterEncodingFilter.java:197）~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
在org.springframework.web.filter.OncePerRequestFilter.doFilter（OncePerRequestFilter.java:107）~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:199）~[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:96）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.authenticator.AuthenticatorBase.invoke（AuthenticatorBase.java:504）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:140）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:81）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:87）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.catalina.connector.CoyoteAdapter.service（CoyoteAdapter.java:342）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.coyote.http11.Http11Processor.service（Http11Processor.java:803）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.coyote.AbstractProcessorLight.process（AbstractProcessorLight.java:66）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.coyote.AbstractProtocol$ConnectionHandler.process（AbstractProtocol.java:790）[tomcat-embed-core-8.5.27.jar:8.5.27]
位于org.apache.tomcat.util.net.niodendpoint$SocketProcessor.doRun（niodendpoint.java:1459）[tomcat-embed-core-8.5.27.jar:8.5.27]
在org.apache.tomcat.util.net.SocketProcessorBase.run（SocketProcessorBase.java:49）[tomcat-embed-core-8.5.27.jar:8.5.27]
位于java.util.concurrent.ThreadPoolExecutor.runWorker（未知源）[na:1.8.0_171]
位于java.util.concurrent.ThreadPoolExecutor$Worker.run（未知源）[na:1.8.0_171]
在org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run（TaskThread.java:61）[tomcat-embed-core-8.5.27.jar:8.5.27]
在java.lang.Thread.run（未知源代码）[na:1.8.0_171]

---

但是我的Angular和SpringBoot中都有headers=“Content Type=multipart/form data”，我不明白为什么会出现这个错误。

您应该使用

@RequestParam

而不是

@RequestBody

@RestController
@RequestMapping("/ml")
public class UploadController {

   @PostMapping("/insert")
   public String uploadFileForm(@RequestParam("uploadFile") MultipartFile file) {
      return file.getOriginalFilename();
   }

}

---

您是否已激活跨站点来源？在控制器中使用@CrossOrigin（origins=“”），或者使用一些Chrome扩展来绕过。是的，我有RestController--RequestMapping（value={“/ml”}）--CrossOrigin尝试将它指定给将执行请求的域，并将缓存过期时间设为maxAge。@CrossOrigin（origins={“}，maxAge=3000）。如果您的客户端使用不同的端口，请更改端口。嗨，Sam，我更改了@CrossOrigin（maxAge=3000），我得到了相同的错误。请检查您的变量名，文件名首先是“file”，然后是“myFile”。如果正确，请尝试作为@RequestParam（“myFile”）传递

org.apache.tomcat.util.http.fileupload.FileUploadException: the request was rejected because no multipart boundary was found
    at org.apache.tomcat.util.http.fileupload.FileUploadBase$FileItemIteratorImpl.<init>(FileUploadBase.java:831) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.tomcat.util.http.fileupload.FileUploadBase.getItemIterator(FileUploadBase.java:256) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.tomcat.util.http.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:280) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.Request.parseParts(Request.java:2869) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.Request.parseParameters(Request.java:3216) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.Request.getParameter(Request.java:1137) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.RequestFacade.getParameter(RequestFacade.java:381) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:75) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-4.3.14.RELEASE.jar:4.3.14.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199) ~[tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:790) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) [na:1.8.0_171]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [na:1.8.0_171]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.27.jar:8.5.27]
    at java.lang.Thread.run(Unknown Source) [na:1.8.0_171]

@RestController
@RequestMapping("/ml")
public class UploadController {

   @PostMapping("/insert")
   public String uploadFileForm(@RequestParam("uploadFile") MultipartFile file) {
      return file.getOriginalFilename();
   }

}