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Spring upload file

I'm new to Spring, I started developing a file upload application, I used the official spring documentation, but I have this error:

  Handler processing failed;  nested exception is java.lang.NoClassDefFoundError: org / apache / commons / io / output / DeferredFileOutputStream
  at org.springframework.web.servlet.DispatcherServlet.doDispatch (DispatcherServlet.java:823)
  at org.springframework.web.servlet.DispatcherServlet.doService (DispatcherServlet.java:719)
  at org.springframework.web.servlet.FrameworkServlet.processRequest (FrameworkServlet.java:644)
  at org.springframework.web.servlet.FrameworkServlet.doPost (FrameworkServlet.java∗60)
  at javax.servlet.http.HttpServlet.service (HttpServlet.java:637)
  at javax.servlet.http.HttpServlet.service (HttpServlet.java:717)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:290)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:206)
  at org.springframework.security.web.FilterChainProxy.doFilter (FilterChainProxy.java:143)
  at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate (DelegatingFilterProxy.java:237)
  at org.springframework.web.filter.DelegatingFilterProxy.doFilter (DelegatingFilterProxy.java:167)
  at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:235)
  at org.apache.catalina.core.ApplicationFilterChain.doFilter (ApplicationFilterChain.java:206)
  at org.apache.catalina.core.StandardWrapperValve.invoke (StandardWrapperValve.java:233)
  at org.apache.catalina.core.StandardContextValve.invoke (StandardContextValve.java:191)
  at org.apache.catalina.core.StandardHostValve.invoke (StandardHostValve.java:127)
  at org.apache.catalina.valves.ErrorReportValve.invoke (ErrorReportValve.java:102)
  at org.apache.catalina.core.StandardEngineValve.invoke (StandardEngineValve.java:109)
  at org.apache.catalina.connector.CoyoteAdapter.service (CoyoteAdapter.java:298)
  at org.apache.coyote.http11.Http11Processor.process (Http11Processor.java:852)
  at org.apache.coyote.http11.Http11Protocol $ Http11ConnectionHandler.process (Http11Protocol.java∗88)
  at org.apache.tomcat.util.net.JIoEndpoint $ Worker.run (JIoEndpoint.java:489)
  at java.lang.Thread.run (Thread.java:619)
 Caused by: java.lang.NoClassDefFoundError: org / apache / commons / io / output / DeferredFileOutputStream
  at org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem (DiskFileItemFactory.java:191)
  at org.apache.commons.fileupload.FileUploadBase.parseRequest (FileUploadBase.javahaps50)
  at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest (ServletFileUpload.java:126)
  at org.springframework.web.multipart.commons.CommonsMultipartResolver.parseRequest (CommonsMultipartResolver.java:155)
  at org.springframework.web.multipart.commons.CommonsMultipartResolver.resolveMultipart (CommonsMultipartResolver.java:138)
  at org.springframework.web.servlet.DispatcherServlet.checkMultipart (DispatcherServlet.java:907)
  at org.springframework.web.servlet.DispatcherServlet.doDispatch (DispatcherServlet.java:750)
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2 answers

Spring file-upload stuff uses Apache Commons FileUpload under covers. You need to download it and include it in your application. This, in turn, also requires Apache Commons IO , so you will need it too.

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did you skip adding jar "general file upload" or "io file" or add an older verson jar

A good example of downloading a file is http://hmkcode.com/spring-mvc-upload-file-ajax-jquery-formdata/

thank you

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Source: https://habr.com/ru/post/1403564/

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