用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excelpublic 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();
}
}
}

遇到的问题：txt文件中单元格数据之间用|分割，用string.split("\\|");提取数据