JAVA操作Excel的方法

excel

此操作使用POI類庫，請到以下URL下載：

http://apache.justdn.org/jakarta/poi/release/bin/poi-bin-2.5.1-final-20040804.zip

以下是源碼：

package com.test;

 

import java.io.FileOutputStream;

import org.apache.poi.hssf.usermodel.HSSFCell;

import org.apache.poi.hssf.usermodel.HSSFRow;

import org.apache.poi.hssf.usermodel.HSSFSheet;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;

import java.io.FileInputStream;

import javax.swing.JOptionPane;

/**

 * 一個Excel檔案的層次：Excel檔案->工作表->行->儲存格

 * 對應到POI中，為：workbook->sheet->row->cell

 */

public class POITest

{

    public static String outputFile = "e:\\test.xls";

public static String fileToBeRead = "e:\\test.xls";

 

    public void createExcel()

    {

        try

        {

            // 建立新的Excel 活頁簿

            HSSFWorkbook workbook = new HSSFWorkbook();

            // 在Excel活頁簿中建一工作表，其名為預設值

            // 如要建立一名為"效益指標"的工作表，其語句為：

            // HSSFSheet sheet = workbook.createSheet("效益指標");

            HSSFSheet sheet = workbook.createSheet("效益指標");

            // 在索引0的位置建立行（最頂端的行）

            HSSFRow row = sheet.createRow((short)0);

            //在索引0的位置建立儲存格（左上端）

            HSSFCell cell = row.createCell((short)0);

            // 定義儲存格為字串類型

            cell.setCellType(HSSFCell.CELL_TYPE_STRING);

            // 在儲存格中輸入一些內容

            cell.setCellValue("POI Excel Model");

            //下一行

            row=sheet.createRow( (short)1);

            cell=row.createCell( (short)0);

            //設定儲存格內容

            cell.setCellValue( "Powered by 夏天");

            // 建立一輸出檔案流

            FileOutputStream fOut = new FileOutputStream(outputFile);

            // 把相應的Excel 活頁簿存檔

            workbook.write(fOut);

            fOut.flush();

            // 操作結束，關閉檔案

            fOut.close();

            System.out.println("檔案產生...");

           

        }

        catch(Exception e)

        {

            System.out.println("已運行 xlCreate() : " + e);

        }

    }

 

    public void readExcel()

    {

        try

        {

            // 建立對Excel活頁簿檔案的引用

            HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(fileToBeRead));

            //System.out

            //  .println("===SheetsNum===" + workbook.getNumberOfSheets());//擷取sheet數

            for(int numSheets = 0; numSheets < workbook.getNumberOfSheets(); numSheets++)

            {

                if(null != workbook.getSheetAt(numSheets))

                {

                    HSSFSheet aSheet = workbook.getSheetAt(numSheets); //獲得一個sheet

 

                    for(int rowNumOfSheet = 0; rowNumOfSheet <= aSheet.getLastRowNum(); rowNumOfSheet++)

                    {

                        if(null != aSheet.getRow(rowNumOfSheet))

                        {

                            HSSFRow aRow = aSheet.getRow(rowNumOfSheet);

 

                            for(short cellNumOfRow = 0; cellNumOfRow <= aRow.getLastCellNum(); cellNumOfRow++)

                            {

 

                                if(null != aRow.getCell(cellNumOfRow))

                                {

                                    HSSFCell aCell = aRow.getCell(cellNumOfRow);

 

                                    System.out.println(aCell.getStringCellValue());

 

                                }

 

                            }

                        }

 

                    }

 

                }

 

            }

 

        }

        catch(Exception e)

        {

            System.out.println("ReadExcelError" + e);

        }

 

    }

 

    public static void main(String[] args)

    {

        POITest poi = new POITest();

        poi.createExcel();

        JOptionPane.showMessageDialog(null,"檔案寫入成功","POI",1);

        poi.readExcel();

        JOptionPane.showMessageDialog(null,"檔案讀取成功","POI",1);

    }

}