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我正在創建一個servlet以在服務器上遠程運行單獨的Java程序。該程序在服務器上散步一組文件夾（KB360/student和KB360/admin）。該程序本身工作，但在tomcat中運行時，我得到一個AccessDeniedException。遞歸地將用戶和組轉換爲tomcat7。我也試過它作爲根。從迄今爲止我所做的研究來看，它似乎不應該成爲tomcat SecurityManager的問題。但是，要查看是否有問題，我將所有權限添加到catalina.policy並重新啓動tomcat。AccessDeniedException使用tomcat步行文件樹
任何想法，將不勝感激。謝謝。
以下是文件夾和錯誤的列表。
/home/user/Desktop/Dropbox/Public/KB360
drwxrwxr-x 5 tomcat7 tomcat7 4096 Jun 25 17:39 ./
drwxrwxr-x 5 user user 4096 Jul 3 22:30 ../
drwxrwxrwx 2 tomcat7 tomcat7 4096 Jul 29 23:43 admin/
-rw-rw-r-- 1 tomcat7 tomcat7 2188 May 25 00:08 kb.jnlp
drwxrwxrwx 2 tomcat7 tomcat7 4096 Jul 29 23:42 student/
drwxrwxr-x 2 tomcat7 tomcat7 4096 Jul 1 02:58 upload/
java.nio.file.AccessDeniedException: /home/user/Desktop/Dropbox/Public/KB360/student
at sun.nio.fs.UnixException.translateToIOException(UnixException.java:84)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:102)
at sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:107)
at sun.nio.fs.UnixFileAttributeViews$Basic.readAttributes(UnixFileAttributeViews.java:55)
at sun.nio.fs.UnixFileSystemProvider.readAttributes(UnixFileSystemProvider.java:143)
at sun.nio.fs.LinuxFileSystemProvider.readAttributes(LinuxFileSystemProvider.java:96)
at java.nio.file.Files.readAttributes(Files.java:1684)
at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:105)
at java.nio.file.FileTreeWalker.walk(FileTreeWalker.java:69)
at java.nio.file.Files.walkFileTree(Files.java:2600)
at java.nio.file.Files.walkFileTree(Files.java:2633)
at kb360.service.UpdateIndex.findFilesInFolder(UpdateIndex.java:66)
at kb360.service.UpdateIndex.update(UpdateIndex.java:181)
at kb360.service.UpdateIndexes.update(UpdateIndexes.java:50)
at kb360.service.UpdateIndexes.update(UpdateIndexes.java:61)
at kb360.service.UpdateIndexes.main(UpdateIndexes.java:132)
at IndexFiles.startRMIServer(IndexFiles.java:57)
at IndexFiles.doGet(IndexFiles.java:28)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:621)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:224)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:169)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:168)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:98)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:927)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:987)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:579)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:309)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)