WorkBook wb=WorkBook.openWorkBook(new File("D:\\data.xls"))//已经存在的excel表
WritableWorkbook wnew=WritableWorkbook.createWorkBook(new File(“D：\\data.xls”),wb);复制
sheet=wnew.createSheet("新建的sheet名字",1);
Label jk=new Lable(0,0,"Ok");//随机举例说明写入的数据
sheet.addcell()//添加到表中
wnew.write()//写入
wnew.close()//保存