下面的代码将返回EmptyFileException，尽管该文件不是空的（在输出中可以看到）：
public class RecordImpl {
private AssociateImpl associate;
public AssociateImpl getAssociate() {
return associate;
}
public void setAssociate(AssociateImpl associate) {
this.associate = associate;
}
public Document createInsertRecord()throws IOException, InvalidFormatException {
String msg = "";
InputStream inputStream = associate.getFileInputStream();
byte[] binaryRep = IOUtils.toByteArray(inputStream);
System.out.println("File length: "+binaryRep.length);
String year = getYear(inputStream, associate.getPosition());
Document newRecord = new Document();
/*remaining code*/
return newRecord;
}
public String getYear(InputStream inputStream, String position)throws IOException, InvalidFormatException {
System.out.println("Inside RecordImpl: getYear()");
//code throws error at the line below
Workbook workbook = WorkbookFactory.create(associate.getFileInputStream());
Sheet sheet = workbook.getSheet(position);
DataFormatter df = new DataFormatter();
Iterator<Row> rowIterator = sheet.iterator();
String year = "";
/*remaining code*/
return year;
}
}
字节数组的长度显示为21787，表明输入流不为空。但是，将引发空文件错误。输出以及堆栈跟踪如下所示：
File length: 21787
Oct 15, 2018 12:11:14 PM org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet [Jersey Web Application] in context with path [/my-goals] threw exception [org.apache.poi.EmptyFileException: The supplied file was empty (zero bytes long)] with root cause
org.apache.poi.EmptyFileException: The supplied file was empty (zero bytes long)
at org.apache.poi.util.IOUtils.peekFirstNBytes(IOUtils.java:74)
at org.apache.poi.util.IOUtils.peekFirst8Bytes(IOUtils.java:57)
at org.apache.poi.poifs.filesystem.FileMagic.valueOf(FileMagic.java:135)
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:177)
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:149)
at com.cerner.model.impl.RecordImpl.getYear(RecordImpl.java:64)
at com.cerner.model.impl.RecordImpl.createInsertRecord(RecordImpl.java:42)
at com.cerner.model.impl.ActionImpl.insertNewRecord(ActionImpl.java:71)
at com.cerner.model.impl.ActionImpl.performAction(ActionImpl.java:43)
at com.cerner.my_goals.GoalResource.uploadFile(GoalResource.java:56)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:143)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:160)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:203)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:97)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:303)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:286)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1072)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:399)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:381)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:344)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:221)
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:52)
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:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:493)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:650)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:800)
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:806)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1498)
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
要传递的文件绝对是非空的XLSX文件。关于可能的问题有什么想法？
答案 0 :(得分：1)
我想和您通话：
byte[] binaryRep = IOUtils.toByteArray(inputStream);
inputStream将移至流的末尾，以便其余字节为0。