这是在浏览器中下载文件的一小段代码。我以前曾经运行过这段代码，但是现在它抛出了异常。在while循环解析期间发生了异常，我无法为此找到任何解决方案。我相信此代码不是问题，但我无法找到导致此问题的原因。要清除文件中的数据，没有错误。
File newFile = new File("resources\\report.xlsx");
FileInputStream fileIn;
try {
fileIn = new FileInputStream(newFile);
ServletOutputStream out = response.getOutputStream();
byte[] outputByte = new byte[1024];
int byteContent;
while ((byteContent = fileIn.read(outputByte, 0, 1024)) != -1)
{
out.write(outputByte, 0, byteContent);
}
fileIn.close();
out.flush();
out.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
它会引发此异常。
org.apache.catalina.connector.ClientAbortException: java.io.IOException: Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:341)
at org.apache.catalina.connector.OutputBuffer.flushByteBuffer(OutputBuffer.java:766)
at org.apache.catalina.connector.OutputBuffer.append(OutputBuffer.java:671)
at org.apache.catalina.connector.OutputBuffer.writeBytes(OutputBuffer.java:376)
at org.apache.catalina.connector.OutputBuffer.write(OutputBuffer.java:354)
at org.apache.catalina.connector.CoyoteOutputStream.write(CoyoteOutputStream.java:96)
at com.siemens.controller.AjaxController.readFile(AjaxController.java:91)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.springframework.web.method.support.InvocableHandlerMethod.invoke(InvocableHandlerMethod.java:214)
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:132)
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:104)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandleMethod(RequestMappingHandlerAdapter.java:749)
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:690)
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:83)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:945)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:876)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)
at org.springframework.web.servlet.FrameworkServlet.doPost(FrameworkServlet.java:863)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:668)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.io.IOException: Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
at java.base/sun.nio.ch.SocketDispatcher.write0(Native Method)
at java.base/sun.nio.ch.SocketDispatcher.write(SocketDispatcher.java:51)
at java.base/sun.nio.ch.IOUtil.writeFromNativeBuffer(IOUtil.java:113)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:79)
at java.base/sun.nio.ch.IOUtil.write(IOUtil.java:50)
at java.base/sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:466)
at org.apache.tomcat.util.net.NioChannel.write(NioChannel.java:134)
at org.apache.tomcat.util.net.NioBlockingSelector.write(NioBlockingSelector.java:105)
at org.apache.tomcat.util.net.NioSelectorPool.write(NioSelectorPool.java:144)
at org.apache.tomcat.util.net.NioEndpoint$NioSocketWrapper.doWrite(NioEndpoint.java:1223)
at org.apache.tomcat.util.net.SocketWrapperBase.doWrite(SocketWrapperBase.java:743)
at org.apache.tomcat.util.net.SocketWrapperBase.writeBlocking(SocketWrapperBase.java:513)
at org.apache.tomcat.util.net.SocketWrapperBase.write(SocketWrapperBase.java:451)
at org.apache.coyote.http11.Http11OutputBuffer$SocketOutputBuffer.doWrite(Http11OutputBuffer.java:530)
at org.apache.coyote.http11.filters.ChunkedOutputFilter.doWrite(ChunkedOutputFilter.java:112)
at org.apache.coyote.http11.Http11OutputBuffer.doWrite(Http11OutputBuffer.java:189)
at org.apache.coyote.Response.doWrite(Response.java:599)
at org.apache.catalina.connector.OutputBuffer.realWriteBytes(OutputBuffer.java:329)
... 45 more
答案 0 :(得分：0)
您的代码没有问题。错误消息是德语的，说明了一切：
Eine bestehende Verbindung wurde softwaregesteuert
durch den Hostcomputer abgebrochen
与主机的连接已断开（断开）。开始写入之前，请检查与（主机）服务器的连接。