java實現excel和txt文件互轉

import java.io.*; 
import jxl.*; 
import jxl.write.*; 

//用java將txt數據導入excel
public class CreateXLS 
{ 
public static void main(String args[]) 
{ 
 try 
 { 
   //打開文件 
   WritableWorkbook book= Workbook.createWorkbook(new File("測試.xls")); 
   //生成名為“第一頁”的工作表，參數0表示這是第一頁 
   WritableSheet sheet=book.createSheet("第一頁",0); 
   //在Label對象的構造子中指名單元格位置是第一列第一行(0,0) 
   //以及單元格內容為test 
   Label label=new Label(0,0,"test"); 
   //將定義好的單元格添加到工作表中 
   sheet.addCell(label); 
   /*生成一個保存數字的單元格 
    必須使用Number的完整包路徑，否則有語法歧義 
    單元格位置是第二列，第一行，值為789.123*/ 
   jxl.write.Number number = new jxl.write.Number(1,0,789.123); 
   sheet.addCell(number); 
   //寫入數據并關閉文件 
   book.write(); 
   book.close(); 
  }catch(Exception e) 
  { 
   System.out.println(e); 
  } 
 } 
}

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

import jxl.Cell;
import jxl.Sheet;
import jxl.Workbook;
import jxl.read.biff.BiffException;

//用java將excel數據導入txt

public class WriteTxt {

public static void main(String[] args) { 
// TODO Auto-generated method stub 
String filepath = "d:\\demo.xls"; 

try { 
Workbook workbook = Workbook.getWorkbook(new File(filepath)); 
Sheet sheet = workbook.getSheet(0); 
File file = new File("d:/1.txt");
FileWriter fw = new FileWriter(file);
BufferedWriter bw = new BufferedWriter(fw);
// j為行數，getCell("列號","行號") 
int j = sheet.getRows();
int y = sheet.getColumns();
for (int i = 0; i < j; i++) { 
for(int x=0; x<y; x++){
Cell c = sheet.getCell(x, i); 
String s = c.getContents(); 
bw.write(s);
bw.write(" ");
bw.flush();
}
bw.newLine();
bw.flush();
} 
System.out.println("寫入結束");
} catch (BiffException e) { 
e.printStackTrace(); 
} catch (IOException e) { 
e.printStackTrace(); 
} 
} 
}

WritableFont wf = new WritableFont(WritableFont.TIMES,12,WritableFont.NO_BOLD,false);
WritableCellFormat wcfF = new WritableCellFormat(NumberFormats.TEXT);
wcfF.setFont(wf);
CellView cv = new CellView();
cv.setFormat(wcfF);
cv.setSize(10*265);
sheet.setColumnView(j, cv);
Label label = new Label(j,n,s1[j]);
sheet.addCell(label);

BufferedReader bw = new BufferedReader(new InputStreamReader(new FileInputStream(new File(filen)),"GBK"));