1 package excel; 2  3  4  import  java.io.File; 5  6  import  jxl.Workbook; 7  import  jxl.write.Label; 8  import  jxl.write.WritableSheet; 9  import  jxl.write.WritableWorkbook;10 11  public   class  UpdateExcel   {12      public   static   void  main(String args[])   {13          try    {14              //  Excel获得文件 15              Workbook wb  =  Workbook.getWorkbook( new  File( " test.xls " ));16              //  打开一个文件的副本，并且指定数据写回到原文件 17              WritableWorkbook book  =  Workbook.createWorkbook( new  File( " test.xls " ),18                     wb);19              //  添加一个工作表 20              WritableSheet sheet  =  book.createSheet( " 第二页 " ,  1 );21             sheet.addCell( new  Label( 0 ,  0 ,  " 第二页的测试数据 " ));22             book.write();23             book.close();24         }   catch  (Exception e)   {25             System.out.println(e);26         } 27     } 28 } 29