NotOLE2FileException：标头签名无效；读取 0x0000000000000000，预期为 0xE11AB1A1E011CFD0

问题描述 投票：0回答：2

我想要做的是询问用户是否要创建新的或选择现有的 Excel 工作簿。选择现有文件没有问题。但是，当我为新的 Excel 文件创建名称时，我收到一条错误消息“您的文件似乎不是有效的 OLE2 文档”。

public void selectExcelFile() {
    String excelFileName = null;                                // the name/directory/address of the excel file created/selected
    FileInputStream excelFileIn = null;                         // allows us to connect to the Excel file so we can read it
    FileOutputStream excelFileOut = null;                       // allows us to connect to the Excel file so we can write to it
    ExcelFileUtility eUtil = new ExcelFileUtility();            // used open an excel file

    if(columnsQuery != null) {
        try {
            excelFileName = eUtil.getFile(FileExtensions.XLS); // file extension = ".xls"

            if(excelFileName != null) {
                excelFileIn = new FileInputStream(new File(excelFileName));
                workbook = new HSSFWorkbook(excelFileIn);

                exportColsToWorkbook(columnsQuery);

                excelFileOut = new FileOutputStream(excelFileName);
                workbook.write(excelFileOut);

                // close everything
                workbook.close();
                excelFileIn.close();
                excelFileOut.close();
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        catch (SQLException e) {
            e.printStackTrace();
        }

    }
}

然后：

public String getFile(String extension) {
    String result = null;

    if(extension != null) {
        int choice = askIfNewFile();

        if(choice == 0) { // yes, create new file
            result = createFile(extension);
        } 

        else { // no, select existing file
            result = getFileLocation();                 
        }
    }
    else {
        System.out.println("No file extension.");
    }
    return result;

}

public String createFile(String extension) throws IOException {
    String newFileName = "";
    File newFile = null;
    boolean isCreated = false;

    JFrame frame = new JFrame("Creating a New ." + extension + " File");
    String result = null;

    String dir = getFileDirectory();
    System.out.println("DIR: " + dir);

    if(dir != null) {
        while(newFileName.isEmpty() || newFileName == null) {
            // Used WorkbookUtil.createSafeSheetName to validate file name
            // Please replace if there is a better option
            newFileName = WorkbookUtil.createSafeSheetName(JOptionPane.showInputDialog(frame, "Enter new ." + extension + " file name:"));
        }

        newFile = new File(dir + "\\" + newFileName + "." + extension);
        System.out.println(newFile.toString());

        try {
            isCreated = newFile.createNewFile();

            if(isCreated) {
                result = newFile.getAbsolutePath();
            }
            else {
                System.out.println("File already exists.");
            }
        }
        catch(IOException ioe) {
            System.out.println(ioe);
        }
    }
    return result;
}

public String getFileLocation() {
    String result = null;
    JFileChooser pickFile = new JFileChooser();

    if (pickFile.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
        try {
            result = pickFile.getSelectedFile().getCanonicalPath();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        // check if file exists
    }
    System.out.println("File location: " + result);

    return result;
}

public String getFileDirectory() {
    String result = null;

    JFileChooser pickFile = new JFileChooser();

    pickFile.setDialogTitle("Choose Folder");
    pickFile.setFileSelectionMode(JFileChooser.DIRECTORIES_ONLY);
    pickFile.setAcceptAllFileFilterUsed(false);

    if (pickFile.showOpenDialog(null) == JFileChooser.APPROVE_OPTION) {
        result = pickFile.getSelectedFile().toString();
    }
    else {
        System.out.println("No Selection ");
    }

    return result;
}

这是我得到的错误：

org.apache.poi.poifs.filesystem.NotOLE2FileException: Invalid header signature; read 0x0000000000000000, expected 0xE11AB1A1E011CFD0 - Your file appears not to be a valid OLE2 document
at org.apache.poi.poifs.storage.HeaderBlock.<init>(HeaderBlock.java:162)
at org.apache.poi.poifs.storage.HeaderBlock.<init>(HeaderBlock.java:112)
at org.apache.poi.poifs.filesystem.NPOIFSFileSystem.<init>(NPOIFSFileSystem.java:300)
at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:400)
at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:381)
at mhhls.him.dbtoexcel.program.DBtoExcel.selectExcelFile(DBtoExcel.java:159)
at mhhls.him.dbtoexcel.program.DBtoExcel.exportToExcel(DBtoExcel.java:422)
at mhhls.him.dbtoexcel.ui.main.DBtoExcelWindow$7.actionPerformed(DBtoExcelWindow.java:183)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

编辑： 我将 selectExcelFile() 方法更改为：

public void selectExcelFile() {
    String excelFileName = null;                                // the name/directory/address of the excel file created/selected
    FileInputStream excelFileIn = null;                         // allows us to connect to the Excel file so we can read it
    FileOutputStream excelFileOut = null;                       // allows us to connect to the Excel file so we can write to it
    ExcelFileUtility eUtil = new ExcelFileUtility();            // used open an excel file
    File newFile = null;

    if(columnsQuery != null) {
        try {
            excelFileName = eUtil.getFile(FileExtensions.XLS);

            if(excelFileName != null) {

                newFile = new File(excelFileName);

                if(newFile.exists()) {
                    try {
                        workbook =  WorkbookFactory.create(newFile);
                    } catch (EncryptedDocumentException | InvalidFormatException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();
                    }
                }
                else {
                   if (newFile.getName().endsWith(".xls")) {
                       workbook = new HSSFWorkbook();
                   }
                   else if (newFile.getName().endsWith(".xlsx")) {
                       workbook = new XSSFWorkbook();
                   }
                   else {
                       throw new IllegalArgumentException("Must be .xls or .xlsx");
                   }
                }

                excelFileIn = new FileInputStream(newFile);
                exportColsToWorkbook(columnsQuery);

                excelFileOut = new FileOutputStream(newFile);
                workbook.write(excelFileOut);

                // close everything
                workbook.close();
                excelFileIn.close();
                excelFileOut.close();
            }
        }
        catch (IOException e) {
            e.printStackTrace();
        }
        catch (SQLException e) {
            e.printStackTrace();
        }

    }
}

在Excel文件工作表上写入工作簿据说可以工作（没有出现任何错误），但是当我打开Excel文件进行检查时，我突然得到了这个： enter image description here

我点击“确定”，它只是空的。没有工作表或工作簿。

这解释了为什么我下次运行程序并尝试在同一个 Excel 文件上写入工作簿时出现此错误。

Exception in thread "AWT-EventQueue-0" org.apache.poi.EmptyFileException: The supplied file was empty (zero bytes long)
at org.apache.poi.poifs.filesystem.NPOIFSFileSystem.<init>(NPOIFSFileSystem.java:216)
at org.apache.poi.poifs.filesystem.NPOIFSFileSystem.<init>(NPOIFSFileSystem.java:166)
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:278)
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:250)
at org.apache.poi.ss.usermodel.WorkbookFactory.create(WorkbookFactory.java:229)
at mhhls.him.dbtoexcel.program.DBtoExcel.selectExcelFile(DBtoExcel.java:205)
at mhhls.him.dbtoexcel.program.DBtoExcel.exportToExcel(DBtoExcel.java:487)
at mhhls.him.dbtoexcel.ui.main.DBtoExcelWindow$7.actionPerformed(DBtoExcelWindow.java:190)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

我只是不明白为什么每当我尝试将工作簿写入新工作表时它都会损坏 Excel 文件。

java excel apache apache-poi
2个回答
7
投票

您似乎错过了一些关键代码行。但是，假设您当前正在做类似的事情：

File newFile = new File("output.xlsx");
if (!newFile.exists) { newFile.createNewFile(); }
Workbook wb = WorkbookFactory.create(newFile);

那么这行不通！

您只能使用 

WorkbookFactory
加载预先存在的 Excel 文件。您不能使用
WorkbookFactory
创建全新的空工作簿。非常相关，你也不能做 
new HSSFWorkbook(emptyStream)
或 
new HSSFWorkbook(emptyFile)
，如果从 
*SSFWorkbook
或 
InputStream
创建 
File
那么它必须存在并被填充。

相反，如果您想创建一个全新的空工作簿，您需要做的更像是：

Workbook wb;
File newFile = new File("output.xlsx");
if (newFile.exists) { 
   // Load existing
   wb = WorkbookFactory.create(newFile);
} else {
   // What kind of file are they trying to ask for?
   // Add additional supported types here
   if (newFile.getName().endsWith(".xls")) {
      wb = new HSSFWorkbook();
   }
   else if (newFile.getName().endsWith(".xlsx")) {
      wb = new XSSFWorkbook();
   }
   else {
      throw new IllegalArgumentException("I don't know how to create that kind of new file");
   }
}

对于全新的空文件，您需要决定创建哪种类型的文件，然后为其新建适当的 

*SSFWorkbook
实例，并且不传入任何流/文件

0
投票

就我而言，我上传了 csv 文件而不是 xls 文件，这导致了此异常。

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