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´´½¨Ò»¸öÎļþtemp£¬Í¬Ê±ÔÚtemp Ŀ¼Ï´´½¨Ò»¸öoutpath.xls
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package com;
import java.io.File;
import java.io.IOException;
import java.text.DateFormat;
import jxl.Workbook;
import jxl.format.UnderlineStyle;
import jxl.write.DateTime;
import jxl.write.Label;
import jxl.write.NumberFormat;
import jxl.write.WritableCell;
import jxl.write.WritableCellFormat;
import jxl.write.WritableFont;
import jxl.write.WritableSheet;
import jxl.write.WritableWorkbook;
import jxl.write.WriteException;
import jxl.write.biff.RowsExceededException;
public class Demo {
//¶¨ÒåÒ»¸ö¾²Ì¬±äÁ¿
   private static String path="d:/temp/";
//²éÕÒÄ¿±êÎļþÊÇ·ñ´æÔÚ
   static void   checkExist(String   path){      
       java.io.File   file   =   new   java.io.File(path);      
       if(file.isDirectory()){      
           System.out.println("the   dir   is   exits");
           file.delete();
       }else{      
           file.mkdirs();      
           System.out.println("made   a   dir   £¡"   );      
       }      
   }   
   public static void main(String args[]) throws IOException, RowsExceededException, WriteException{
    Demo.checkExist(path);
    File tempFile=new File(path+"outpath.xls");