關于學習處理Multipart形式的資料時遇到的異常The temporary upload location [path] is not valid

一、異常資訊如下所示：

嚴重: Servlet.service() for servlet [dispatcher] in context with path [/spittr] threw exception [Request processing failed; nested exception is org.springframework.web.multipart.MultipartException: Could not parse multipart servlet request; nested exception is java.io.IOException: The temporary upload location [D:\workspace-sts\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost\spittr\tmp\spittr\uploads] is not valid] with root cause
java.io.IOException: The temporary upload location [D:\workspace-sts\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost\spittr\tmp\spittr\uploads] is not valid
	at org.apache.catalina.connector.Request.parseParts(Request.java:2779)
	at org.apache.catalina.connector.Request.getParts(Request.java:2712)
	at org.apache.catalina.connector.RequestFacade.getParts(RequestFacade.java:1098)
	at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.parseRequest(StandardMultipartHttpServletRequest.java:84)
	at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:77)
	at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:76)
	at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1073)
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:912)
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:877)
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:966)
	at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:868)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:842)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
	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:53)
	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:199)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:494)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:651)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:407)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Unknown Source)
           

二、運作環境：eclipse + SpringMVC。

三、1.DispatcherServlet配置如下：

public class SpittrWebAppInitializer extends AbstractAnnotationConfigDispatcherServletInitializer {

	// 将DispatcherServlet映射到"/"
	@Override
	protected String[] getServletMappings() {
		return new String[] { "/" };
	}

	// 指定配置類
	@Override
	protected Class<?>[] getRootConfigClasses() {
		return new Class<?>[] { RootConfig.class };
	}

	// 指定配置類
	@Override
	protected Class<?>[] getServletConfigClasses() {
		return new Class<?>[] { WebConfig.class };
	}

	@Override
	protected void customizeRegistration(Dynamic registration) {
		//限制檔案大小不超過2M，整個請求不超過4M，而且所有檔案都要寫到磁盤中。
		registration.setMultipartConfig(new MultipartConfigElement("/tmp/spittr/uploads", 2097152, 4194304, 0));
	}
}
           

2.Multipart解析器如下：

@Bean
	public MultipartResolver multipartResolver() throws IOException{ // Multipart解析器
		System.out.println("配置Multipart解析器");
		return new StandardServletMultipartResolver();
	}                @Bean
	public MultipartResolver multipartResolver() throws IOException{ // Multipart解析器
		System.out.println("配置Multipart解析器");
		return new StandardServletMultipartResolver();
	}      

四、異常原因：指定檔案夾不存在。

五、解決方式：建立異常資訊中指定的檔案夾。例如針對我上述的異常的解決方式，就是建立“D:\workspace-sts\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost\spittr\tmp\spittr\uploads”檔案夾，實際上“D:\workspace-sts\.metadata\.plugins\org.eclipse.wst.server.core\tmp0\work\Catalina\localhost\spittr”檔案夾一般都是存在的，是以僅僅需要在這個檔案夾下建立“\tmp\spittr\uploads”就可以了！

以上，希望能有所幫助！