文件上傳中的臨時上傳路徑問題

在用multipart上傳文件的時候，報錯：

java.io.IOException: The temporary upload location [D:\apache-tomcat-8.0.9\work\Catalina\localhost\spittr\tmp\spittr\uploads] is not valid
at org.apache.catalina.connector.Request.parseParts(Request.java:2616)
at org.apache.catalina.connector.Request.getParts(Request.java:2552)
at org.apache.catalina.connector.RequestFacade.getParts(RequestFacade.java:1083)
at org.springframework.web.multipart.support.StandardMultipartHttpServletRequest.<init>(StandardMultipartHttpServletRequest.java:57)
at org.springframework.web.multipart.support.StandardServletMultipartResolver.resolveMultipart(StandardServletMultipartResolver.java:60)
at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:1070)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:912)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:644)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655)
at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:277)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2381)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2370)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:744)

 

原因：

    protected void customizeRegistration(Dynamic registration) {
        registration.setMultipartConfig(new MultipartConfigElement("/tmp/spittr/uploads",2097152,4194304,0));
    }

 

在這里設置了臨時存儲的路徑，但是在tomcat中並沒有設置。（之所以設置臨時路徑，是為了存儲的安全性）

解決辦法：

在D:\apache-tomcat-8.0.9\work\Catalina\localhost\spittr目錄下新建tmp\spittr\uploads即可

 

但是如果重新啟動tomcat的話，則臨時保存的文件消失

為了達到永久保存，需要保存在磁盤上，但是此時會存在無法再網頁上訪問的問題：

這是需要：

解決：可以使用tomcat的配置文件將某個請求 映射到 物理路徑下 ，完成圖片的回顯。

具體操作：使用Tomcat虛擬路徑

1.修改tomcat的配置文件

window環境

 

首先找到tomcat目錄下conf目錄下的server.xml文件

 

在server.xml文件中找到<Host></Host>

 

然后在其中加上這例如這個：

<Context path="/spittr/image" docBase="E:\spittr\image"></Context>

 

此時

tomcat在的請求一般為http://localhost:8080/spittr/image/abc.jpg

配置完重啟之后，該請求會自動跳轉到物理路徑E:\spittr\image下查找。會訪問本機的E:\spittr\image\abc.jpg

有效解決了存儲路徑與tomcat路徑的分離。