SpringMVC 上传文件遇到的问题和解决方法

淩亂°似流年 2022-04-24 20:50 247阅读 0赞

背景：

SpringMVC项目需要上传文件。于是按照下面的步骤操作了。但是还是遇到了问题。

第一步，在application-context.xml添加了如下的代码

第二步，然后在Controller里面添加接收file上传的代码如下

@RequestMapping(value = "/file/upload",method = RequestMethod.POST)
        @Response
        public BaseResult fileUpload(@RequestPart("file") MultipartFile file , HttpServletRequest request) throws IOException {
            File serverFile = UploadUtils.saveFile(file);
            return new DataResult(result);
        }

第三步，用POST发上传文件的请求

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzI0MjEwNzY3_size_16_color_FFFFFF_t_70][]

但是。Web服务抛错。异常如下。注意看异常。

multipart servlet request; nested exception is java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided
    [dart-backend]15:36:31 506 ERROR (com.ximalaya.mobile.common.exception.resolver.BaseHandlerExceptionResolver:70) - resolve exception message:Could not parse multipart servlet request; nested exception is java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided,request:/dart-backend/file/upload,queryString:null
    org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; nested exception is java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided
    	at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:111)
    	at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:85)
    	at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:79)
    	at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1099)
    	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:932)
    	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
    	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
    	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:872)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:661)
    	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
    	at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at com.ximalaya.xdcs.spring.filter.XmlyXdcsTraceFilter.doFilter(XmlyXdcsTraceFilter.java:169)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at com.nali.common.web.CharacterFilter.doFilter(CharacterFilter.java:57)
    	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
    	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
    	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
    	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
    	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
    	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
    	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
    	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
    	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
    	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:800)
    	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1471)
    	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    	at java.lang.Thread.run(Thread.java:748)
    Caused by: java.lang.IllegalStateException: Unable to process parts as no multi-part configuration has been provided
    	at org.apache.catalina.connector.Request.parseParts(Request.java:2826)
    	at org.apache.catalina.connector.Request.getParts(Request.java:2793)
    	at org.apache.catalina.connector.RequestFacade.getParts(RequestFacade.java:1084)
    	at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:92)
    	... 38 more

解决方法：在DispatcherServlet里面添加Multipart-config 配置。写入loaction和 文件上传大小限制就能解决上面抛异常的问题了。

<servlet>
            <servlet-name>Spring Web</servlet-name>
            <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
            <init-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:web-context.xml</param-value>
            </init-param>
            <load-on-startup>1</load-on-startup>
            <multipart-config>
                
                <location>/tmp/upload/</location>
                
                <max-file-size>10485760</max-file-size>
                
                <max-request-size>10485760</max-request-size>
            </multipart-config>
        </servlet>
        <servlet-mapping>
            <servlet-name>Spring Web</servlet-name>
            <url-pattern>/*</url-pattern>
        </servlet-mapping>

最后说明：

我之前找了很多人的解决方案。都是不正确的。写这个就是希望大家可以最快的解决问题。不走弯路。在这里我真的很想吐槽国内的程序员的质量真是太差了。写博客一个问题都描述不清楚。如果你看到我的博客问题还是不能解决。可以在评论里面留言。我看到后会给予帮助。希望国内的程序员都能好好写博客。不然最后大家和世界的差距只会越来越大。

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