java.lang.RuntimeException: java.io.IOException: No such file or directory    at org.apache.poi.xssf.streaming.SXSSFWorkbook.createAndRegisterSXSSFSheet(SXSSFWorkbook.java:569)    at org.apache.poi.xssf.streaming.SXSSFWorkbook.createSheet(SXSSFWorkbook.java:558)    at com.app.util.ExcelIOUtil.write(ExcelIOUtil.java:46)    at com.app.controllers.DrivingSchoolController.download(DrivingSchoolController.java:106)    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 com.mvc.invoke.ActionInvoker.invoke(ActionInvoker.java:75)    at com.mvc.MvcDispatcher.service(MvcDispatcher.java:119)    at com.mvc.MvcFilter.doFilter(MvcFilter.java:67)    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99)    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1023)    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589)    at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:1810)    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)    at java.lang.Thread.run(Thread.java:662) 

  public void write(OutputStream stream) throws IOException{   for (SXSSFSheet sheet : _xFromSxHash.values()){     sheet.flushRows();     }    //保存到臨時目錄    File tmplFile = File.createTempFile("poi-sxssf-template", ".xlsx");    tmplFile.deleteOnExit();    FileOutputStream os = new FileOutputStream(tmplFile);    _wb.write(os);    os.close();    //Substitute the template entries with the generated sheet data files    injectData(tmplFile, stream);    tmplFile.delete();  }