java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream

 java.lang.ClassNotFoundException: org.apache.commons.io.output.DeferredFileOutputStream
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:)
    at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:)
    at org.apache.commons.fileupload.disk.DiskFileItemFactory.createItem(DiskFileItemFactory.java:)
    at org.apache.commons.fileupload.FileUploadBase.parseRequest(FileUploadBase.java:)
    at org.apache.commons.fileupload.servlet.ServletFileUpload.parseRequest(ServletFileUpload.java:)
    at org.springframework.web.multipart.commons.CommonsMultipartResolver.parseRequest(CommonsMultipartResolver.java:)
    at org.springframework.web.multipart.commons.CommonsMultipartResolver.resolveMultipart(CommonsMultipartResolver.java:)
    at org.springframework.web.servlet.DispatcherServlet.checkMultipart(DispatcherServlet.java:)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:)
    at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:)
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:)
    at java.lang.Thread.run(Thread.java:)

今天在做上传文件时候,遇到了

java.lang.ClassNotFoundException: org.apache.commons.io.output.DeferredFileOutputStream,这个文件没有被找到的异常,
然后发现在原来是commons-fileupload jar 包从1.0升到1.1的时候。DeferredFileOutputStream.class被移除了。
现在只能再引入一个依赖

commons-io

,这个jar包中包含上面的那个类.
引入以后,一切运行正常.
这个异常在以启动tomcat的时候,就会报出来这个异常,请打架小心留意.