Java 使用POI操纵Excel 2007

这是两个例程，是演示如何使用Java读取和写入Excel 2007 文件。注释里有比较详细的开发环境说明，你只要在Eclipse里粘过去不可以运行了。
例程使用的是POI-XSSF，而不是HSSF，这个地方要注意一下，不过他们的用法很类似，如果你看明白一个了，应该很容易理解另一个
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并保留作者姓名和本句话，谢谢合作


/******************************************************************************
* 演示使用POI 写入 Excel 2007
*
* 关键字：Java Excel POI POI-HSSF POI-XSSF
*
gjrencai.com
* 注释：http://www.gjrencai.com/newsShow.asp?dataID=1485
* 开发环境详细说明：
* 1、java version "1.6.0_14"
* 2、Java(TM) SE Runtime Environment (build 1.6.0_14-b08)
* 3、Java HotSpot(TM) Client VM (build 14.0-b16, mixed mode, sharing)
* 4、Microsoft Excel 2007
* 5、Windows XP Home Edition Service Pack 3
* 6、Apache POI 3.5
*
*****************************************************************************/
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CreationHelper;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class POIExcelWriteDemo1
{

    /**
     * @param args
     */
    public static void main(String[] args)
    {
        // TODO Auto-generated method stub
        try
        {
            Workbook wb = new XSSFWorkbook();
            CreationHelper createHelper = wb.getCreationHelper();
            Sheet sheet = wb.createSheet("这里是第一页");

            // 创建行
            Row row = sheet.createRow((short) 0);
            // 创建单元格，方法1
            Cell cell = row.createCell(0);
            cell.setCellValue(1);
            // 直接创建单元格，方法2
            row.createCell(1).setCellValue(1.2);
            row.createCell(2)
                    .setCellValue(createHelper.createRichTextString("大家好，我是高宏伟"));
            row.createCell(3).setCellValue(
                    createHelper.createRichTextString("QQ：21807822"));
            row.createCell(4).setCellValue(true);

            // 写入文件
            FileOutputStream fileOut;
            fileOut = new FileOutputStream("gaohw.xlsx");
            wb.write(fileOut);
            fileOut.close();
            System.out.println("写入成功，运行结束！");
        } catch (FileNotFoundException e)
        {
            e.printStackTrace();
        } catch (IOException e)
        {
            e.printStackTrace();
        }
    }
}


以下是读取Excel文件的例程

/******************************************************************************
* 演示使用POI 读取 Excel 2007
*
* 关键字：Java Excel POI POI-HSSF POI-XSSF
* 注释：http://www.gjrencai.com/newsShow.asp?dataID=1485 *
* 开发环境详细说明：
* 1、java version "1.6.0_14"
* 2、Java(TM) SE Runtime Environment (build 1.6.0_14-b08)
* 3、Java HotSpot(TM) Client VM (build 14.0-b16, mixed mode, sharing)
* 4、Microsoft Excel 2007
* 5、Windows XP Home Edition Service Pack 3
* 6、Apache POI 3.5
*
*****************************************************************************/
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;

import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.ss.usermodel.WorkbookFactory;

public class POIExcelReadDemo1
{

    /**
     * @param args
     */
    public static void main(String[] args)
    {
        try
        {
        InputStream inp;
            inp = new FileInputStream("gaohw.xlsx");
            Workbook wb = WorkbookFactory.create(inp);
            Sheet sheet = wb.getSheetAt(0);
            for (Iterator rit = sheet.rowIterator(); rit.hasNext();)
            {
                // 迭代行
                Row row = (Row) rit.next();
                // 迭代单元格
                for (Iterator cit = row.cellIterator(); cit.hasNext();)
                {
                    Cell cell = (Cell) cit.next();
                    // 开始操作单元格
                    // 在每一行的输出都打印如 "5:6 例子字符串"，5:6代表第5行，第6列
                    // 注意行和列是基于0索引的
                    System.out.print(cell.getRowIndex() + ":" + cell.getColumnIndex()
                            + " ");
                    // 打印单元格内的数据
                    switch (cell.getCellType())
                    {
                    case Cell.CELL_TYPE_STRING:
                        System.out.println(cell.getRichStringCellValue().getString());
                        break;
                    case Cell.CELL_TYPE_NUMERIC:
                        if (DateUtil.isCellDateFormatted(cell))
                        {
                            System.out.println(cell.getDateCellValue());
                        } else
                        {
                            System.out.println(cell.getNumericCellValue());
                        }
                        break;
                    case Cell.CELL_TYPE_BOOLEAN:
                        System.out.println(cell.getBooleanCellValue());
                        break;
                    case Cell.CELL_TYPE_FORMULA:
                        System.out.println(cell.getCellFormula());
                        break;
                    default:
                        System.out.println();
                    }
                }
            }
        } catch (FileNotFoundException e)
        {
            e.printStackTrace();
        } catch (InvalidFormatException e)
        {
            e.printStackTrace();
        } catch (IOException e)
        {
            e.printStackTrace();
        }
    }
}