jQuery 和 Spring-Boot 文件上传导致“所需的请求部分‘文件’不存在”

【问题标题】：jQuery and Spring-Boot file upload causes "Required request part 'file' is not present"jQuery 和 Spring-Boot 文件上传导致“所需的请求部分‘文件’不存在”
【发布时间】：2017-02-09 15:52:09
【问题描述】：

我有一个文件要上传到我的 spring-boot 微服务。我正在使用 jQuery 使用 FormData javascript 对象发布文件。由于无法将我的 FormData 文件与 RequestParam 文件匹配，Spring-boot 没有在我的控制器中调用我的端点。

JavaScript：

var name = "TEST";
var kml = '<kml><Document><Placemark id="' + name + '"><Point><coordinates>-69.83701518,47.817278750000014</coordinates></Point></Placemark></Document></kml>';
// upload the kml file to the server
var data = new FormData();
data.append('file', kml);
$.ajax({
    method: "POST",
    url: "http://localhost:9096/upload/" + name,
    data: data,
    cache: false,
    contentType: false,
    processData: false,
    success: function(data){
        console.log("success", name, data);
    }
});

这是我的控制器代码：

@RestController
public class MicroServiceController {

    private Logger logger = LoggerFactory.getLogger(MicroServiceController.class);

    @RequestMapping(value="/upload/{name}", method = { RequestMethod.POST })
    public ResponseEntity<?> uploadKML(@PathVariable String name, @RequestParam("file") MultipartFile file ) throws IOException {
        logger.debug("Upload: {}", name);

        return new ResponseEntity<Boolean>(true, HttpStatus.OK);
    }
}

这是一个例外：

2017-02-09 11:45:52.860 DEBUG 5521 --- [nio-9096-exec-1] o.s.b.f.s.DefaultListableBeanFactory     : Returning cached instance of singleton bean 'microServiceController'
2017-02-09 11:45:52.888 DEBUG 5521 --- [nio-9096-exec-1] .w.s.m.m.a.ServletInvocableHandlerMethod : Failed to resolve argument 1 of type 'org.springframework.web.multipart.MultipartFile'

org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present
    at org.springframework.web.method.annotation.RequestParamMethodArgumentResolver.handleMissingValue(RequestParamMethodArgumentResolver.java:193) ~[spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:109) ~[spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) ~[spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:158) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:116) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:105) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.6.RELEASE.jar!/:4.3.6.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:798) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1434) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [na:1.8.0_121]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [na:1.8.0_121]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.11.jar!/:8.5.11]
    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_121]

2017-02-09 11:45:52.889 DEBUG 5521 --- [nio-9096-exec-1] .m.m.a.ExceptionHandlerExceptionResolver : Resolving exception from handler [public org.springframework.http.ResponseEntity<?> com.jasco.microservice.MicroServiceController.uploadKML(java.lang.String,org.springframework.web.multipart.MultipartFile) throws java.io.IOException]: org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present
2017-02-09 11:45:52.891 DEBUG 5521 --- [nio-9096-exec-1] .w.s.m.a.ResponseStatusExceptionResolver : Resolving exception from handler [public org.springframework.http.ResponseEntity<?> com.jasco.microservice.MicroServiceController.uploadKML(java.lang.String,org.springframework.web.multipart.MultipartFile) throws java.io.IOException]: org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present
2017-02-09 11:45:52.891 DEBUG 5521 --- [nio-9096-exec-1] .w.s.m.s.DefaultHandlerExceptionResolver : Resolving exception from handler [public org.springframework.http.ResponseEntity<?> com.jasco.microservice.MicroServiceController.uploadKML(java.lang.String,org.springframework.web.multipart.MultipartFile) throws java.io.IOException]: org.springframework.web.multipart.support.MissingServletRequestPartException: Required request part 'file' is not present
2017-02-09 11:45:52.891 DEBUG 5521 --- [nio-9096-exec-1] o.s.web.servlet.DispatcherServlet        : Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
2017-02-09 11:45:52.892 DEBUG 5521 --- [nio-9096-exec-1] o.s.web.servlet.DispatcherServlet        : Successfully completed request

这是请求和标头：

Request URL:http://localhost:9096/upload/TEST
Request Method:POST
Status Code:400 
Remote Address:127.0.0.1:9096

Request Headers:
  Accept:*/*
  Accept-Encoding:gzip, deflate, br
  Accept-Language:en-GB,en-US;q=0.8,en;q=0.6
  Cache-Control:no-cache
  Connection:keep-alive
  Content-Length:273
  Content-Type:multipart/form-data; boundary=----WebKitFormBoundaryM401einBJzuTMVSj
  Host:localhost:9096
  Origin:http://localhost:8090
  Pragma:no-cache
  Referer:http://localhost:8090/
  User-Agent:Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.76 Safari/537.36

Request Payload
------WebKitFormBoundaryM401einBJzuTMVSj
Content-Disposition: form-data; name="file"

<kml><Document><Placemark id="TEST"><Point><coordinates>-69.83701518,47.817278750000014</coordinates></Point></Placemark></Document></kml>
------WebKitFormBoundaryM401einBJzuTMVSj--

以及响应 JSON：

{"timestamp":1486655346223,"status":400,"error":"Bad Request","exception":"org.springframework.web.multipart.support.MissingServletRequestPartException","message":"Required request part 'file' is not present","path":"/upload/TEST"}

对我来说，看起来我将文件名设置为“文件”，并且我也在微服务中寻找“文件”......但它似乎没有在 spring 上建立连接-引导端。我很困惑，因为这一切看起来都像我在互联网上找到的示例和问题，但我仍然得到例外。

任何关于下一步要尝试什么或我搞砸的地方的建议都会很有帮助！

【问题讨论】：

  • 我对 spring-boot 社区取消他们的论坛，然后不回答 stackoverflow 问题感到非常失望。他们网站上几乎整个问题页面都有 0 个答案。
  • 对于其他遇到此问题的人，我正在通过不使用表单数据而是将 kml 放入正文中来解决此问题，然后将参数从“@RequestParam MultipartFile 文件”更改为“@ RequestBody 字符串 kml”。如果我的公里数太大，我会被狗咬的。
  • 我发现把MultipartFile改成MultipartFile[]会调用成功，但是数组是空的。
  • 底层请求包含正确的上传文件数据，但spring-boot无法识别。不确定这是弹簧启动错误还是我做错了什么 - 我不会解决这个问题 - 只是通过使用 body raw 来避开它。

标签： jquery spring spring-boot file-upload netflix-zuul


【解决方案1】：

原来这是系统架构和 Netflix 造成的问题。正在使用zuul重定向请求，有an issue in Zuul that is causing the name of the MultiPart form parameter to be stripped。

我正在升级到 Spring Boot 2.1 - 我认为它应该可以修复它。

【讨论】：

    【解决方案2】：

    您在控制器方法中使用 @RequestParam("file")，因此控制器希望您的 file 值包含在请求中，例如：

    http://localhost:9096/upload/TEST?file=TEST

    如果您不想将文件参数作为 URL 的一部分发送，您应该尝试使用不同的 Spring 注解，例如 @ModelAttribute。

    希望对你有帮助，

    【讨论】：

    • 我看到的所有分段文件上传示例都使用@RequestParam 作为文件。我会更仔细地研究它，因为它是有道理的。
    • 显然，文件上传与将对象嵌入到请求正文中的工作方式不同。还是没有成功。
    猜你喜欢
    • 2017-04-06
    • 2019-09-08
    • 1970-01-01
    • 2017-10-09
    • 2020-10-22
    • 1970-01-01
    • 2017-10-11
    • 2020-09-14
    相关资源
    最近更新 更多
    热门标签
    Java Python linux javascript Mysql C# Docker 算法 前端 SpringBoot Redis Vue spring 设计模式 .net core .net kubernetes c++ 数据库 数据结构 大数据 js 机器学习 微服务 Android Go 程序员 面试 JVM ASP.net core 云原生 人工智能 后端 PHP git CSS golang k8s Nginx Django mybatis 深度学习 多线程 React 架构 devops 爬虫 云计算 Spring Boot LeetCode