关于MultipartUpload上传文件问题

本人刚刚接触OSS，使用aliyun_java_sdk_20151124中OSSMultipartSample.java例子实现大文件分块上传，demo中的例子能执行成功，但是搬到web程序中就报错了
求助，不知道为什么截图上传图片很模糊

14:41:22,578  WARN oss:62 - [Client]Unable to execute HTTP request: Unknown
com.aliyun.oss.ClientException: Unknown
        at com.aliyun.oss.common.utils.ExceptionFactory.createNetworkException(ExceptionFactory.java:68)
        at com.aliyun.oss.common.comm.DefaultServiceClient.sendRequestCore(DefaultServiceClient.java:67)
        at com.aliyun.oss.common.comm.ServiceClient.sendRequestImpl(ServiceClient.java:121)
        at com.aliyun.oss.common.comm.ServiceClient.sendRequest(ServiceClient.java:67)
        at com.aliyun.oss.internal.OSSOperation.send(OSSOperation.java:89)
        at com.aliyun.oss.internal.OSSOperation.doOperation(OSSOperation.java:130)
        at com.aliyun.oss.internal.OSSOperation.doOperation(OSSOperation.java:108)
        at com.aliyun.oss.internal.OSSOperation.doOperation(OSSOperation.java:103)
        at com.aliyun.oss.internal.OSSMultipartOperation.uploadPart(OSSMultipartOperation.java:319)
        at com.aliyun.oss.OSSClient.uploadPart(OSSClient.java:696)
        at com.centralsoft.core.utils.FileUtils.multipartUpload(FileUtils.java:160)
        at com.centralsoft.core.utils.FileUtils.uploadFile(FileUtils.java:94)
        at com.centralsoft.web.wjgl.WjglController.upload(WjglController.java:162)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.springframework.web.servlet.mvc.multiaction.MultiActionController.invokeNamedMethod(MultiActionController.java:403)
        at org.springframework.web.servlet.mvc.multiaction.MultiActionController.handleRequestInternal(MultiActionController.java:358)
        at org.springframework.web.servlet.mvc.AbstractController.handleRequest(AbstractController.java:139)
        at org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter.handle(SimpleControllerHandlerAdapter.java:44)
        at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:684)
        at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:625)
        at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:392)
        at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:357)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:643)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:723)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at com.centralsoft.filter.requestToHashMap.doFilter(requestToHashMap.java:44)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at com.centralsoft.filter.SetCharacterEncoding.doFilter(SetCharacterEncoding.java:28)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at com.centralsoft.filter.SetCharacterEncoding.doFilter(SetCharacterEncoding.java:28)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at com.centralsoft.filter.AccessControlFilter.doFilter(AccessControlFilter.java:127)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:137)
        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:103)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:861)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:606)
        at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
        at java.lang.Thread.run(Thread.java:619)
Caused by: org.apache.http.NoHttpResponseException: dingshenghua.oss-cn-hangzhou.aliyuncs.com:80 failed to respond
        at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:143)
        at org.apache.http.impl.conn.DefaultHttpResponseParser.parseHead(DefaultHttpResponseParser.java:57)
        at org.apache.http.impl.io.AbstractMessageParser.parse(AbstractMessageParser.java:261)
        at org.apache.http.impl.AbstractHttpClientConnection.receiveResponseHeader(AbstractHttpClientConnection.java:283)
        at org.apache.http.impl.conn.DefaultClientConnection.receiveResponseHeader(DefaultClientConnection.java:251)
        at org.apache.http.impl.conn.ManagedClientConnectionImpl.receiveResponseHeader(ManagedClientConnectionImpl.java:197)
        at org.apache.http.protocol.HttpRequestExecutor.doReceiveResponse(HttpRequestExecutor.java:272)
        at org.apache.http.protocol.HttpRequestExecutor.execute(HttpRequestExecutor.java:124)
        at org.apache.http.impl.client.DefaultRequestDirector.tryExecute(DefaultRequestDirector.java:685)
        at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:487)
        at org.apache.http.impl.client.AbstractHttpClient.doExecute(AbstractHttpClient.java:882)
        at com.aliyun.oss.common.comm.DefaultServiceClient.sendRequestCore(DefaultServiceClient.java:64)
        ... 50 more