为什么我不能在Spring Boot应用程序中处理分段上传？我获得了＃34;找不到匹配的编辑器或转化策略＆＃34;

时间：2017-01-02 15:47:21

标签： spring spring-mvc spring-boot

我正在开发 Spring Boot 应用程序，我发现在尝试实现处理多部分文件上传的控制器方法时遇到了一些困难。

要做到这一点，我已经改编了这个 Spring MVC 教程：http://www.codejava.net/coding/upload-files-to-database-with-spring-mvc-and-hibernate

基本上要将多部分支持添加到我的Spring Boot项目中，我没有在配置类中添加这个bean（如教程中所做的那样）：

@Bean(name = "multipartResolver")
public CommonsMultipartResolver getCommonsMultipartResolver() {
    CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
    multipartResolver.setMaxUploadSize(20971520);   // 20MB
    multipartResolver.setMaxInMemorySize(1048576);  // 1MB
    return multipartResolver;
}

但我刚将这些属性添加到我的应用程序的 application.properties 文件中：

multipart.enabled=true      // enable file uploading

所以应该启用它。

然后我有这个控制器类：

@RestController
@RequestMapping("/AccomodationMedia")
public class AccomodationMediaController {

    private static final Logger log = LoggerFactory.getLogger(AccomodationMediaController.class);

    @Autowired
    private AccomodationMediaService accomodationMediaService;


    public AccomodationMediaController() {
        log.debug("AccomodationMediaController init");
    }

    @RequestMapping(value = "/doUpload", method = RequestMethod.POST)
    public String handleFileUpload(HttpServletRequest request,
                                   @RequestParam CommonsMultipartFile[] fileUpload) throws Exception {

        if (fileUpload != null && fileUpload.length > 0) {
            for (CommonsMultipartFile currentFile : fileUpload){

                System.out.println("Saving file: " + currentFile.getOriginalFilename());

                accomodationMediaService.saveAccomodationMedia(currentFile);

            }
        }

        return "Success";
    }

}

正如您在上面的代码中看到的，它包含 handleFileUpload（）方法，该方法可以处理 Http POST请求到URL： AccomodationMedia / doUpload 网址。

然后我创建了这个独立的标准HTML页面来测试这个 handleFileUpload（）控制器方法的行为：

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
     "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Spring MVC - Hibernate File Upload to Database Demo</title>
</head>
<body>
    <div align="center">
        <h1>Spring MVC - Hibernate File Upload to Database Demo</h1>
        <form method="post" action="http://localhost:8080/AccomodationMedia/doUpload" enctype="multipart/form-data">
            <table border="0">
                <tr>
                    <td>Pick file #1:</td>
                    <td><input type="file" name="fileUpload" size="50" /></td>
                </tr>
                <tr>
                    <td>Pick file #2:</td>
                    <td><input type="file" name="fileUpload" size="50" /></td>
                </tr>
                <tr>
                    <td colspan="2" align="center"><input type="submit" value="Upload" /></td>
                </tr>
            </table>
        </form>
    </div>
</body>
</html>

此页面包含要插入2个要上载的文件的表单。 如您所见，表单提交会针对 http://localhost:8080/AccomodationMedia/doUpload

生成POST请求

所以我在调试模式下启动应用程序，在选择文件的开头放一个括号点，然后单击上一个 handleFileUpload（）控制器方法。然后我在上一页中选择一个文件，然后点击生成POST请求的上传按钮。

问题是它没有进入 handleFileUpload（）执行但我在堆栈跟踪中获取以下错误消息：

[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:865)] [http-nio-8080-exec-10] DispatcherServlet - DispatcherServlet with name 'dispatcherServlet' processing POST request for [/AccomodationMedia/doUpload]
[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:310)] [http-nio-8080-exec-10] RequestMappingHandlerMapping - Looking up handler method for path /AccomodationMedia/doUpload
[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.servlet.handler.AbstractHandlerMethodMapping.getHandlerInternal(AbstractHandlerMethodMapping.java:317)] [http-nio-8080-exec-10] RequestMappingHandlerMapping - Returning handler method [public java.lang.String com.betrivius.controller.media.AccomodationMediaController.handleFileUpload(javax.servlet.http.HttpServletRequest,org.springframework.web.multipart.commons.CommonsMultipartFile[]) throws java.lang.Exception]
[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:167)] [http-nio-8080-exec-10] ServletInvocableHandlerMethod - Error resolving argument [1] [type=[Lorg.springframework.web.multipart.commons.CommonsMultipartFile;]
HandlerMethod details: 
Controller [com.betrivius.controller.media.AccomodationMediaController]
Method [public java.lang.String com.betrivius.controller.media.AccomodationMediaController.handleFileUpload(javax.servlet.http.HttpServletRequest,org.springframework.web.multipart.commons.CommonsMultipartFile[]) throws java.lang.Exception]

org.springframework.web.method.annotation.MethodArgumentConversionNotSupportedException: Failed to convert value of type [java.util.LinkedList] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile[]]; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile]: no matching editors or conversion strategy found
    at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:119) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:161) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:89) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_65]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_65]
Caused by: java.lang.IllegalStateException: Cannot convert value of type [org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile]: no matching editors or conversion strategy found
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:306) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:143) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterDelegate.convertToTypedArray(TypeConverterDelegate.java:479) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:216) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:108) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterSupport.doConvert(TypeConverterSupport.java:64) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterSupport.convertIfNecessary(TypeConverterSupport.java:47) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.validation.DataBinder.convertIfNecessary(DataBinder.java:688) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:115) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    ... 51 more
[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.servlet.handler.AbstractHandlerExceptionResolver.resolveException(AbstractHandlerExceptionResolver.java:133)] [http-nio-8080-exec-10] ExceptionHandlerExceptionResolver - Resolving exception from handler [public java.lang.String com.betrivius.controller.media.AccomodationMediaController.handleFileUpload(javax.servlet.http.HttpServletRequest,org.springframework.web.multipart.commons.CommonsMultipartFile[]) throws java.lang.Exception]: org.springframework.web.method.annotation.MethodArgumentConversionNotSupportedException: Failed to convert value of type [java.util.LinkedList] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile[]]; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile]: no matching editors or conversion strategy found
[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver.doResolveHandlerMethodException(ExceptionHandlerExceptionResolver.java:370)] [http-nio-8080-exec-10] ExceptionHandlerExceptionResolver - Invoking @ExceptionHandler method: public org.springframework.http.ResponseEntity<java.lang.String> com.betrivius.controller.exceptionHandler.ControllerExceptionHandler.handleException(org.apache.catalina.servlet4preview.http.HttpServletRequest,java.lang.Exception)
[ERROR] 2017-01-02 16:35:14 [com.betrivius.controller.exceptionHandler.ControllerExceptionHandler.handleException(ControllerExceptionHandler.java:106)] [http-nio-8080-exec-10] ControllerExceptionHandler - Request: http://localhost:8080/AccomodationMedia/doUpload  throws: 
org.springframework.web.method.annotation.MethodArgumentConversionNotSupportedException: Failed to convert value of type [java.util.LinkedList] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile[]]; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile]: no matching editors or conversion strategy found
    at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:119) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:121) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:161) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:128) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114) ~[spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:648) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:230) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:89) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:77) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:784) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:802) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1410) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_65]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_65]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-8.5.5.jar:8.5.5]
    at java.lang.Thread.run(Thread.java:745) [?:1.8.0_65]
Caused by: java.lang.IllegalStateException: Cannot convert value of type [org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile]: no matching editors or conversion strategy found
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:306) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:143) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterDelegate.convertToTypedArray(TypeConverterDelegate.java:479) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:216) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterDelegate.convertIfNecessary(TypeConverterDelegate.java:108) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterSupport.doConvert(TypeConverterSupport.java:64) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.beans.TypeConverterSupport.convertIfNecessary(TypeConverterSupport.java:47) ~[spring-beans-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.validation.DataBinder.convertIfNecessary(DataBinder.java:688) ~[spring-context-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    at org.springframework.web.method.annotation.AbstractNamedValueMethodArgumentResolver.resolveArgument(AbstractNamedValueMethodArgumentResolver.java:115) ~[spring-web-4.3.3.RELEASE.jar:4.3.3.RELEASE]
    ... 51 more
[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.servlet.mvc.method.annotation.AbstractMessageConverterMethodProcessor.writeWithMessageConverters(AbstractMessageConverterMethodProcessor.java:250)] [http-nio-8080-exec-10] HttpEntityMethodProcessor - Written [Errore interno] as "text/html" using [org.springframework.http.converter.StringHttpMessageConverter@26feccf7]
[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.servlet.DispatcherServlet.processDispatchResult(DispatcherServlet.java:1044)] [http-nio-8080-exec-10] DispatcherServlet - Null ModelAndView returned to DispatcherServlet with name 'dispatcherServlet': assuming HandlerAdapter completed request handling
[DEBUG] 2017-01-02 16:35:14 [org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1000)] [http-nio-8080-exec-10] DispatcherServlet - Successfully completed request

因此错误的主要原因似乎是：

Caused by: java.lang.IllegalStateException: Cannot convert value of type [org.springframework.web.multipart.support.StandardMultipartHttpServletRequest$StandardMultipartFile] to required type [org.springframework.web.multipart.commons.CommonsMultipartFile]: no matching editors or conversion strategy found

究竟意味着什么？似乎无法转换 CommonsMultipartFile [] 中的上传文件或类似的内容。

与教程示例的唯一区别是：

1）我正在使用 Spring Boot ，因此我正在激活multipart添加属性 multipart.enabled = true 。

2）与本教程不同，我没有使用 commons-fileupload 依赖的 1.3.1 版本，但我使用的是较新的 1.3.2 版本（但我不认为这可能是个问题）

究竟是什么意思？我该如何解决？

1 个答案:

答案 0 :(得分：5)

只需在属性文件中添加以下代码：

# multipart 
multipart.enabled=true
spring.http.multipart.max-file-size=500000KB
spring.http.multipart.max-request-size=500000KB

并将@RequestParam MultipartFile pic

替换为@RequestParam CommonsMultiPartFile 
@PostMapping("/up")
public String saveFile(@RequestParam MultipartFile pic,@RequestParam String author) {
    System.out.println("osgn jsm ojmpdn");
    System.out.println(pic);
    System.out.println(author);
    return "ok";
}
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