那些遇到过的问题

为什么在此Spring Boot应用程序中无法处理分段上传？我获得“找不到匹配的编辑器或转换策略”

And*_*ili 5 spring spring-mvc spring-boot

我正在使用Spring Boot应用程序，但在尝试实现处理分段文件上传的控制器方法时发现一些困难。

为此，我改编了这个Spring MVC教程：http : //www.codejava.net/coding/upload-files-to-database-with-spring-mvc-and-hibernate

基本上是为了将多部分支持添加到我的Spring Boot项目中，我没有将此bean添加到配置类中（如本教程所述）：

@Bean(name = "multipartResolver")
public CommonsMultipartResolver getCommonsMultipartResolver() {
    CommonsMultipartResolver multipartResolver = new CommonsMultipartResolver();
    multipartResolver.setMaxUploadSize(20971520);   // 20MB
    multipartResolver.setMaxInMemorySize(1048576);  // 1MB
    return multipartResolver;
}
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但我只是将此属性添加到我的应用程序的application.properties文件中：

multipart.enabled=true      // enable file uploading
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因此应该启用它。

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";
    }

}
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如您在前面的代码中所见，它包含handleFileUpload（）方法，该方法处理对URL的Http POST请求：AccomodationMedia / doUpload URL。

然后，我创建了这个独立的标准HTML页面，以测试此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>
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此页面包含用于插入2个文件的表格。如您所见，表单提交会向http：// localhost：8080 / AccomodationMedia / doUpload生成POST请求

因此，我以调试模式启动应用程序，在选择文件的开头放置了一个点，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，然后单击生成POST请求的Upload按钮。

问题是它没有输入handleFileUpload（）执行，但是我在我的stacktrace中获取了以下错误消息：

[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 ja

小智 6

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
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并将@RequestParam CommonsMultiPartFile替换为 @RequestParam MultipartFile pic

@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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