老师好，index.jsp上传图片时显示超时，tomcat日志如下

[21:58:40.400][INFO][com.mmall.service.impl.FileServiceImpl][http-bio-8080-exec-1] 开始上传文件,上传文件的文件名:22370675cc61cac2aa972af54f61bb07.gif,上传的路径:/developer/apache-tomcat-7.0.73/webapps/ROOT/upload,新文件名:31f8bee3-d979-4b38-8db9-584bf0701fe6.gif

[21:58:40.400][INFO][com.mmall.util.FTPUtil][http-bio-8080-exec-1] 开始连接ftp服务器

[21:59:43.400][ERROR][com.mmall.util.FTPUtil][http-bio-8080-exec-1] 连接FTP服务器异常

java.net.ConnectException: Connection timed out

at java.net.PlainSocketImpl.socketConnect(Native Method) ~[na:1.7.0_80]

at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339) ~[na:1.7.0_80]

at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200) ~[na:1.7.0_80]

at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182) ~[na:1.7.0_80]

at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) ~[na:1.7.0_80]

at java.net.Socket.connect(Socket.java:579) ~[na:1.7.0_80]

at org.apache.commons.net.SocketClient.connect(SocketClient.java:171) ~[commons-net-3.1.jar:3.1]

at org.apache.commons.net.SocketClient.connect(SocketClient.java:192) ~[commons-net-3.1.jar:3.1]

at org.apache.commons.net.SocketClient.connect(SocketClient.java:285) ~[commons-net-3.1.jar:3.1]

at com.mmall.util.FTPUtil.connectServer(FTPUtil.java:73) [classes/:na]

at com.mmall.util.FTPUtil.uploadFile(FTPUtil.java:42) [classes/:na]

at com.mmall.util.FTPUtil.uploadFile(FTPUtil.java:32) [classes/:na]

at com.mmall.service.impl.FileServiceImpl.upload(FileServiceImpl.java:45) [classes/:na]

at com.mmall.controller.backend.ProductManageController.upload(ProductManageController.java:130) [classes/:na]

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.7.0_80]

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) ~[na:1.7.0_80]

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.7.0_80]

at java.lang.reflect.Method.invoke(Method.java:606) ~[na:1.7.0_80]

at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214) [spring-web-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132) [spring-web-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:748) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:689) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:931) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:833) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:650) [servlet-api.jar:na]

at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:807) [spring-webmvc-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at javax.servlet.http.HttpServlet.service(HttpServlet.java:731) [servlet-api.jar:na]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [catalina.jar:7.0.73]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.73]

at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat7-websocket.jar:7.0.73]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.73]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.73]

at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88) [spring-web-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108) [spring-web-4.0.0.RELEASE.jar:4.0.0.RELEASE]

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.73]

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.73]

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218) [catalina.jar:7.0.73]

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.73]

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505) [catalina.jar:7.0.73]

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169) [catalina.jar:7.0.73]

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.73]

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:958) [catalina.jar:7.0.73]

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.73]

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:452) [catalina.jar:7.0.73]

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1087) [tomcat-coyote.jar:7.0.73]

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637) [tomcat-coyote.jar:7.0.73]

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316) [tomcat-coyote.jar:7.0.73]

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_80]

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_80]

at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.73]

at java.lang.Thread.run(Thread.java:745) [na:1.7.0_80]

[21:59:43.401][INFO][com.mmall.util.FTPUtil][http-bio-8080-exec-1] 开始连接ftp服务器,结束上传,上传结果:{}