利用java操作excel文�g

landril — Tue, 12 Dec 2006 11:07:00 GMT

利用java操作excel文�g

Java Excel是一开放源码项目，通过它Java开发�h员可以读取Excel文�g的内宏V��创建新的Excel文�g、更新已�l�存在的Excel文�g。��用该API非Windows操作�pȝ��也可以通过�U�Java应用来处理Excel数据表。因为是使用Java�~�写的，所以我们在Web应用中可以通过JSP、Servlet来调用API实现对Excel数据表的讉K��?br />
/**
* 从excel表格中读出数�?br /> * @param sourcefile
* @return
*/
public List readExcel(String sourcefile) {

  Workbook rwb = null;
  List waterPrices = new ArrayList();
  try {
   // 直接从本地文件创建Workbook(工作��?
   InputStream is = new FileInputStream(sourcefile);
   rwb = Workbook.getWorkbook(is);
   // 获取�W�一张Sheet�?工作表，�?��Z��标开�?
   Sheet rs = rwb.getSheet(0);

   for (int i = 3; i < 28; i++) {
    String managerDepartment = rs.getCell(0, i).getContents();
    if (managerDepartment != null
      && managerDepartment.trim().length() > 0) {
     BigDecimal wPrice = new BigDecimal(rs.getCell(1, i)
       .getContents());
     BigDecimal sewagePrice = new BigDecimal(rs.getCell(2, i)
       .getContents());
     String remark = rs.getCell(3, i).getContents();

     WaterPrice waterPrice = new WaterPrice();
     waterPrice.setManagerDepartment(managerDepartment);
     waterPrice.setWaterPrice(wPrice);
     waterPrice.setSewagePrice(sewagePrice);
     waterPrice.setRemark(remark);
     waterPrices.add(waterPrice);
    }
   }
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (BiffException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
  return waterPrices;

}

/**
* ��数据写入excel表格�?br /> * @param targetfile
*/
public void writeExcel(String targetfile) {

  WritableWorkbook wwb = null;
  try {
   // 创徏可写入的Excel工作�?br />   OutputStream os = new FileOutputStream(targetfile);
   wwb = Workbook.createWorkbook(os);
   // 创徏Excel工作�?br />   WritableSheet ws = wwb.createSheet("水�h��理", 0);

   for (int i = 8; i < 28; i++) {
    Label managerDepartment = new Label(0, i, "��理部门" + i);
    ws.addCell(managerDepartment);
    Number waterPrice = new Number(1, i, 555);
    ws.addCell(waterPrice);
    Number sewagePrice = new Number(2, i, 6);
    ws.addCell(sewagePrice);
    Label remark = new Label(3, i, "备注" + i);
    ws.addCell(remark);
   }
  } catch (FileNotFoundException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  } catch (RowsExceededException e) {
   e.printStackTrace();
  } catch (WriteException e) {
   e.printStackTrace();
  } finally {
   try {
    // 记得一定要写这两句�?写入Exel工作�?关闭Excel工作薄对�?br />    wwb.write();
    wwb.close();
   } catch (IOException e) {
    e.printStackTrace();
   } catch (WriteException e) {
    e.printStackTrace();
   }

}

}

java excel api 下蝲地址�Q?br />http://sourceforge.net/project/showfiles.php?group_id=79926

java excel api 参考学习地址�Q?br />http://www-128.ibm.com/developerworks/cn/java/l-javaExcel/

landril 2006-12-12 19:07 发表评论

landril — Mon, 11 Dec 2006 12:21:00 GMT

采用JDBC�q�行数据库分��|��?br />
/**
* 一�ơ只从数据库中查询最大maxCount条记�?br /> * @param sql 传入的sql语句
* @param startNo 从哪一条记录开�?br /> * @param maxCount ��d��取多��条记录
*/
public void getData(String sql,int startNo,int maxCount){
  Connection conn = ConnectionUtil.getConnection();
  try {
//   conn.prepareStatement(sql,游标�c�d��,能否更新记录);
//      游标�c�d��Q?br />//       ResultSet.TYPE_FORWORD_ONLY:只进游标
//       ResultSet.TYPE_SCROLL_INSENSITIVE:可滚动。但是不受其他用户对数据库更改的影响�?br />//       ResultSet.TYPE_SCROLL_SENSITIVE:可滚动。当其他用户更改数据库时�q�个记录也会改变�?br />//      能否更新记录�Q?br />//       ResultSet.CONCUR_READ_ONLY,只读
//       ResultSet.CONCUR_UPDATABLE,可更�?br />   PreparedStatement pstat = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
   //最大查询到�W�几条记�?br />   pstat.setMaxRows(startNo+maxCount-1);
   ResultSet rs = pstat.executeQuery();
   //��游标移动到�W�一条记�?br />   rs.first();
//   游标�U�d��到要输出的第一条记�?br />   rs.relative(startNo-2);
   while(rs.next())
    System.out.println(rs.getInt(1));
  } catch (SQLException e) {
   e.printStackTrace();
  }
}

/**
* 从数据库中查询所有记录，然后通过游标来获取所需maxCount条记�?br /> * @param sql 传入的sql语句
* @param startNo 从哪一条记录开�?br /> * @param maxCount ��d��取多��条记录
*/
public void getDataFromAll(String sql,int startNo,int maxCount){
  Connection conn = ConnectionUtil.getConnection();
  try {
   PreparedStatement pstat = conn.prepareStatement(sql,ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
   ResultSet rs = pstat.executeQuery();
   rs.first();
   rs.relative(startNo-1);
   int i = startNo-1;
   while(i < startNo + maxCount-1 && !rs.isAfterLast()){
    System.out.println(rs.getInt(1));
    i++;
    rs.next();
   }
  } catch (SQLException e) {
   e.printStackTrace();
  }
}

landril 2006-12-11 20:21 发表评论

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利用java操作excel文�g