我遇到以下错误：
org.apache.poi.poifs.filesystem.NotOLE2FileException: Invalid header signature; read 0x0010000200040009, expected 0xE11AB1A1E011CFD0 - Your file appears not to be a valid OLE2 document
at org.apache.poi.poifs.storage.HeaderBlock.<init>(HeaderBlock.java:144)
at org.apache.poi.poifs.storage.HeaderBlock.<init>(HeaderBlock.java:113)
at org.apache.poi.poifs.filesystem.NPOIFSFileSystem.<init>(NPOIFSFileSystem.java:231)
at org.apache.poi.poifs.filesystem.NPOIFSFileSystem.<init>(NPOIFSFileSystem.java:167)
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:254)
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:226)
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:205)
at main.Raport.read_excels(Raport.java:261)
at main.Raport.<init>(Raport.java:67)
at main.Avanzamento$4.actionPerformed(Avanzamento.java:138)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:90)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
在我的代码的这一部分：
wb = WorkbookFactory.create(file_excel);
我的文件是EXCEL FILE。我也用TIKA（1.18）检查过： 它给出的文件是：
application/vnd.ms-excel
我不知道问题出在哪里... 如果我在Excel中打开该文档，然后以当前格式（.xls）再次保存，一切都很好
编辑： 我正在做这样的事情，以便通过TIKA进行阅读：
package main;
import java.io.File;
import org.apache.tika.Tika;
public class Detect_type {
public static void main(String[] args) throws Exception {
File file = new File("C:/Users/EDP/Desktop/conf 1/2018/201812.xls");
//Instantiating tika facade class
Tika tika = new Tika();
//detecting the file type using detect method
String filetype = tika.detect(file);
System.out.println(filetype);
}
}
编辑2 现在，我将路径扩展为不带“ .xls”扩展名的文件：
File file = new File("C:/Users/EDP/Desktop/conf 1/2018/201812");
并且在Windows中我也删除了扩展名： enter image description here
并收到此错误：
Exception in thread "main" java.io.FileNotFoundException: C:\Users\EDP\Desktop\conf 1\2018\201812 (The system cannot find the file specified)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at org.apache.tika.io.TikaInputStream.<init>(TikaInputStream.java:496)
at org.apache.tika.io.TikaInputStream.get(TikaInputStream.java:267)
at org.apache.tika.Tika.detect(Tika.java:287)
at main.Detect_type.main(Detect_type.java:17)