[class org.springframework.mock.web.MockMultipartFile] 没有转换器，具有预设的 Content-Type 'null']

问题描述

我有一个带有文件的 FTP 客户端，我有一个 RestController，我在其中调用端点以从服务器获取文件。当我发送它时，我不希望将文件保存在机器上，但出现此错误。

这是我的控制器：

@GetMapping(value = "/{name}",produces = MediaType.MULTIPART_FORM_DATA_VALUE)
public multipartfile downloadFileFromDirectory(@RequestParam("user") String user,@RequestParam("password") String password,@PathVariable("name") String name) throws Exception {
    FTPClient ftpClient = new FTPClient();

    try {
        ftpClient.connect(server,port);
        ftpClient.login(user,password);

        ftpClient.enterLocalPassiveMode();

        multipartfile mf = download(ftpClient,"/"+name,name);

        ftpClient.logout();
        ftpClient.disconnect();

        return mf;

    } catch (IOException ex) {
        throw new RuntimeException(ex);
    }
}

这是下载方法：

    private multipartfile download(FTPClient ftpClient,String remoteFilePath,String name) throws Exception{
    File tempFile = File.createTempFile("prefix-","-suffix");
    OutputStream outputStream = new FileOutputStream(tempFile);
    try {
        ftpClient.setFileType(FTP.BINARY_FILE_TYPE);
        ftpClient.retrieveFile(remoteFilePath,outputStream);
        multipartfile mf = new Mockmultipartfile(name,new FileInputStream(tempFile));
        tempFile.delete();
        return mf;
    } catch (IOException ex) {
        throw ex;
    } finally {
        if (outputStream != null) {
            outputStream.close();
        }
    }
}

我在 Postman 中遇到的错误是下一个：

"error": "内部服务器错误","trace": "org.springframework.http.converter.HttpMessageNotWritableException: [class org.springframework.mock.web.Mockmultipartfile] 没有转换器，具有预设的 Content-Type 'null'\r\n\tat org.springframework.web。 servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:312)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestResponseBodyMethodProcessor.handleReturnValue(RequestResponseBodyMethodProcessor)\r\n\tat \n\tat org.springframework.web.method.support.HandlerMethodReturnValueHandlerComposite.handleReturnValue(HandlerMethodReturnValueHandlerComposite.java:78)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.ServletinvocableHandlerMethod.invokeAndHandle(ServletinvocableHandlerMethod. java:124)\r\n\tat org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:894)\r\n\tat org.springframewo rk.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808)\r\n\tat org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) \r\n\tat org.springframework.web.servlet.dispatcherServlet.dodispatch(dispatcherServlet.java:1060)\r\n\tat org.springframework.web.servlet.dispatcherServlet.doService(dispatcherServlet.java:962)\r \n\tat org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006)\r\n\tat org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898)\r\n \tat javax.servlet.http.HttpServlet.service(HttpServlet.java:626)\r\n\tat org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883)\r\n\tat javax. servlet.http.HttpServlet.service(HttpServlet.java:733)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)\r\n\tat org.apache.catalina.catalina。核心应用程序plicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)\r\n\tat org.apache.catalina.core。 ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.springframework.web.filter.CorsFilter。 doFilterInternal(CorsFilter.java:91)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter( ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.keycloak.adapters.springsecurity.filter.KeycloakAuthenticatedActionsFilter.doFilter( KeycloakAuthenticatedActionsFilter.java:57)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apach e.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.keycloak.adapters.springsecurity.filter.KeycloakSecurityContextRequestFilter.doFilter(KeycloakSecurityContextRequestFilter.java:61)\r\n\tat org. apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.keycloak。 adapters.springsecurity.filter.KeycloakPreAuthActionsFilter.doFilter(KeycloakPreAuthActionsFilter.java:96)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache. catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:218)\r\n\tat org.springframework. security.web.authentication.AbstractAuthenticationProcessi ngFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain。 doFilter(ApplicationFilterChain.java:162)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:327)\r\n\tat org.springframework.security.web.access。 intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:115)\r\n\tat org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:81)\r\n\tat org.springframework。 security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:119)\r\n\tat org. springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)\r\n\ta t org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:126)\r\ n\tat org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:81)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\ r\n\tat org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:105)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336) )\r\n\tat org.keycloak.adapters.springsecurity.filter.KeycloakAuthenticatedActionsFilter.doFilter(KeycloakAuthenticatedActionsFilter.java:74)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java) :336)\r\n\tat org.keycloak.adapters.springsecurity.fil ter.KeycloakSecurityContextRequestFilter.doFilter(KeycloakSecurityContextRequestFilter.java:92)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.springframework.security。 web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:149)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.springframework. security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org. springframework.security.web.authentication.logout.logoutFilter.doFilter(logoutFilter.java:103)\r\n\tat org.springframework.security.web.authentication.logout.logoutFilter.doFilter(logoutFilter.java:89)\r \n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.do过滤器(FilterChainProxy.java:336)\r\n\tat org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:218)\r\n\tat org.springframework.security.web.authentication。 AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.keycloak.adapters.springsecurity。 filter.KeycloakPreAuthActionsFilter.doFilter(KeycloakPreAuthActionsFilter.java:96)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.springframework.security。 web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:90)\r\n\tat org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:75)\r\n\tat org.springframework。 web.filter.OncePerRequestFilter.doFilter(OncePerRequestF ilter.java:119)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.springframework.security.web.context.SecurityContextPersistenceFilter。 doFilter(SecurityContextPersistenceFilter.java:110)\r\n\tat org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:80)\r\n\tat org.springframework.security.web.FilterChainProxy$ VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:55)\r\n\tat org.springframework。 web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:336)\r\n\tat org.springframework。 security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:211)\r\n\tat org.springfra mework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:183)\r\n\tat org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358)\r\n\tat org.springframework。 web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache.catalina。 core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.springframework.boot.actuate.metrics.web.servlet.WebMvcmetricsFilter.doFilterInternal(WebMvcmetricsFilter.java:93)\r\n\tat org. springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)\r\n\tat org.apache. catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(Ch aracterEncodingFilter.java:201)\r\n\tat org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain. java:189)\r\n\tat org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)\r\n\tat org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java: 202)\r\n\tat org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97)\r\n\tat org.keycloak.adapters.tomcat.AbstractAuthenticatedActionsValve.invoke(AbstractAuthenticated.java:67) \r\n\tat org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:542)\r\n\tat org.keycloak.adapters.tomcat.AbstractKeycloakAuthenticatorValve.invoke(AbstractKeycloakAuthenticatorValve)\java: \n\tat org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143)\r\n\tat org.apache.catalina.valves.ErrorReportValve.inv oke(ErrorReportValve.java:92)\r\n\tat org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78)\r\n\tat org.apache.catalina.connector.CoyoteAdapter.service( CoyoteAdapter.java:357)\r\n\tat org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374)\r\n\tat org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java: 65)\r\n\tat org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:893)\r\n\tat org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint. java:1707)\r\n\tat org.apache.tomcat.util.net.socketProcessorBase.run(SocketProcessorBase.java:49)\r\n\tat java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:第 1149 章java:61)\r\n\tat java.lang.Thread.run(Thread.java:748)\r\n","message": "[class org.springframework.mock.web.Mockmultipartfile] 没有转换器，具有预设的 Content-Type 'null'"

我该如何解决这个问题？

解决方法

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