jxl中的WritablewWorkbook.write（）會生成空的excel文件0b

Question

我在這裏做錯了什麼？ JTextFields的值是有效的，代碼用於將結果打印到控制檯。我在我的工作區中獲得一個文件，但其大小= 0b並顯示一個空的電子表格。

import java.awt.event.ActionEvent; 
import java.awt.event.ActionListener; 
import java.io.File; 
import java.io.IOException; 

import javax.swing.JTextField; 

import jxl.Cell; 
import jxl.Sheet; 
import jxl.Workbook; 
import jxl.WorkbookSettings; 
import jxl.format.CellFormat; 
import jxl.read.biff.BiffException; 
import jxl.write.Label; 
import jxl.write.WritableCellFormat; 
import jxl.write.WritableSheet; 
import jxl.write.WritableWorkbook; 
import jxl.write.WriteException; 
import jxl.write.biff.RowsExceededException; 

public class convertFileAction implements ActionListener { 
    File _file; 
    JTextField _filePath; 
    JTextField _whichColumn; 
    String _path; 
    int _column; 

    public convertFileAction(JTextField tfFilePath, JTextField tfWhichColumn) { 
     _filePath = tfFilePath; 
     _whichColumn = tfWhichColumn; 
    } 

    @Override 
    public void actionPerformed(ActionEvent e) { 
     _path = _filePath.getText(); 
     _file = new File(_path); 
     _column = Integer.parseInt(_whichColumn.getText()); 
     _column = _column - 1; 

     try { 
      WorkbookSettings wbSettings = new WorkbookSettings(); 
      wbSettings.setUseTemporaryFileDuringWrite(true); 
      Workbook workbook = Workbook.getWorkbook(_file); 
      // System.out.println(""+_file.exists()); 
      Sheet sheet = workbook.getSheet(0); 
      WritableWorkbook genWorkbook = Workbook.createWorkbook(new File(
        "output.xls")); 
      WritableSheet genSheet = genWorkbook.createSheet("Ad IDs", 0); 
      Label headerIc = new Label(1, 1, "ifContexts"); 
      genSheet.addCell(headerIc); 
      for (int i = 0; sheet.getCell(_column, i) != null; i++) { 
       Cell c = sheet.getCell(_column, i); 
        CellFormat readFormat = c.getCellFormat(); 
        WritableCellFormat writeFormat = new WritableCellFormat(
          readFormat); 
        System.out.println(c.getContents()); 
        String ifContext = c.getContents().toString(); 
        Label labIfContext = new Label(1, i + 1, ifContext); 
        labIfContext.setCellFormat(writeFormat); 
        genSheet.addCell(labIfContext); 
      } 
      genWorkbook.write(); 
      workbook.close(); 
      genWorkbook.close(); 

     } catch (BiffException | IOException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } catch (RowsExceededException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } catch (WriteException e1) { 
      // TODO Auto-generated catch block 
      e1.printStackTrace(); 
     } 

    } 

} 

我確實收到控制檯中的錯誤，但我不確定它是否有關。在這裏它是反正：

Exception in thread "AWT-EventQueue-1" jxl.common.AssertionFailed 
    at jxl.common.Assert.verify(Assert.java:37) 
    at jxl.biff.XFRecord.<init>(XFRecord.java:521) 
    at jxl.write.biff.CellXFRecord.<init>(CellXFRecord.java:69) 
    at jxl.write.WritableCellFormat.<init>(WritableCellFormat.java:96) 
    at convertFileAction.actionPerformed(convertFileAction.java:54) 
    at java.awt.Button.processActionEvent(Unknown Source) 
    at java.awt.Button.processEvent(Unknown Source) 
    at java.awt.Component.dispatchEventImpl(Unknown Source) 
    at java.awt.Component.dispatchEvent(Unknown Source) 
    at java.awt.EventQueue.dispatchEventImpl(Unknown Source) 
    at java.awt.EventQueue.access$200(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$1.doIntersectionPrivilege(Unknown Source) 
    at java.security.ProtectionDomain$1.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$1.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) 

非常讚賞。

Answer 1

試試這個.....

   CellFormat readFormat = c.getCellFormat(); 
       System.out.println(c.getContents()); 
       String ifContext = c.getContents().toString(); 
       Label labIfContext = new Label(1, i + 1, ifContext); 
       labIfContext.setCellFormat(readFormat); 
       genSheet.addCell(labIfContext);