Writing to an Existing Excel File

问题

 package jexcel.jxl.nimit;

    import java.awt.Label;  
    import java.io.File;  
    import java.io.IOException;

    import jxl.Cell;   
    import jxl.CellType;  
    import jxl.LabelCell;  
    import jxl.NumberCell;  
    import jxl.Sheet;  
    import jxl.Workbook;  
    import jxl.read.biff.BiffException;  
    import jxl.write.WritableCell;  
    import jxl.write.WritableSheet;  
    import jxl.write.WritableWorkbook;  
    import jxl.write.WriteException;  
    import jxl.write.biff.RowsExceededException;  

    public class ExcelJxl {

    /**
     * @param args
     * @throws IOException 
     * @throws BiffException 
     * @throws WriteException 
     * @throws RowsExceededException 
     */
    public static void main(String[] args) throws BiffException, IOException, RowsExceededException, WriteException {
        // TODO Auto-generated method stub
             ExcelJxl.WriteFile("D:\nimit.xls");
    }

    public static void WriteFile(String path) throws BiffException, IOException, RowsExceededException, WriteException{

    Workbook wb=Workbook.getWorkbook(new File(path));

    WritableWorkbook copy=Workbook.createWorkbook(new File("D:\temp.xls"),wb);
    WritableSheet sheet = copy.getSheet(1); 
    WritableCell cell = sheet.getWritableCell(0,0); 
    String S="nimit";
    if (cell.getType() == CellType.LABEL) 
    { 
      LabelCell l = (LabelCell) cell; 
      l.setString(S); 
    }
    copy.write(); 
    copy.close();
    wb.close();

    }
   }

I have edited my program, and now it says that setString() The method setString(String) is undefined for the type LabelCell I read the Documentation, there is a method setString in the LabelCell type.

回答1:

LabelCell is just an interface with only one method i.e getString() you can learn more about it here

You should use jxl.write.Label instead.
What you should exactly do is as follows
You should import the following file

import jxl.write.Label

Then following is the code for adding a cell at desired location to an excel file

Workbook existingWorkbook = Workbook.getWorkbook(new File(fileToEdit.getAbsolutePath()));
WritableWorkbook workbookCopy = Workbook.createWorkbook(new File("output.xls"), existingWorkbook);
WritableSheet sheetToEdit = workbookCopy.getSheet(sheetName);
WritableCell cell;
Label l = new Label(currentColumn, currentRow, value);
cell = (WritableCell) l;
sheetToEdit.addCell(cell);
 workbookCopy.write();
 workbookCopy.close();
 existingWorkbook.close();

currentColumn and currentRow define the index and value contains the String to be placed in that cell.

Hope it helps

来源：https://stackoverflow.com/questions/11338383/writing-to-an-existing-excel-file

标签

java

jxl

jxls