java实现excel和txt文件互转

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

//用java将txt数据导入excel
public class CreateXLS 
{ 
public static void main(String args[]) 
{ 
 try 
 { 
   //打开文件 
   WritableWorkbook book= Workbook.createWorkbook(new File("测试.xls")); 
   //生成名为“第一页”的工作表，参数0表示这是第一页 
   WritableSheet sheet=book.createSheet("第一页",0); 
   //在Label对象的构造子中指名单元格位置是第一列第一行(0,0) 
   //以及单元格内容为test 
   Label label=new Label(0,0,"test"); 
   //将定义好的单元格添加到工作表中 
   sheet.addCell(label); 
   /*生成一个保存数字的单元格 
    必须使用Number的完整包路径，否则有语法歧义 
    单元格位置是第二列，第一行，值为789.123*/ 
   jxl.write.Number number = new jxl.write.Number(1,0,789.123); 
   sheet.addCell(number); 
   //写入数据并关闭文件 
   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将excel数据导入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为行数，getCell("列号","行号") 
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("写入结束");
} 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"));