poi修改excel

import org.apache.poi.poifs.filesystem.POIFSFileSystem;

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

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

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

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

import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import org.apache.poi.xssf.usermodel.XSSFSheet;

import org.apache.poi.xssf.usermodel.XSSFRow;

import org.apache.poi.xssf.usermodel.XSSFCell;

import java.io.*;

import java.util.ArrayList;

import java.util.Date;

import java.sql.Timestamp;

import java.text.DecimalFormat;

/**
 * 
 * Created by IntelliJ IDEA. User: admin Date: 2011-10 -10 Time: 16:10:29 To
 * 
 * change this template use File | Settings | File Templates.
 */

public class UpdateExcel2003 {

	/**
	 * 
	 * 只是一個demo，這裏假設修改的值是String類型
	 * 
	 * 
	 * 
	 * @param exlFile
	 * 
	 * @param sheetIndex
	 * 
	 * @param col
	 * 
	 * @param row
	 * 
	 * @param value
	 * 
	 * @throws Exception
	 */

	public static void updateExcel(File exlFile, int sheetIndex, int col,

	int row, int outRowStart) throws Exception {

		ArrayList<String> timeList = new ArrayList<String>();

		FileInputStream fis = new FileInputStream(exlFile);

		HSSFWorkbook workbook = new HSSFWorkbook(fis);

		HSSFSheet sheet = workbook.getSheetAt(sheetIndex); // 第五個sheet頁

		// HSSFRow r=sheet.getRow(row);//第

		// HSSFCell cell=r.getCell(col);

		// int type=cell.getCellType();

		// String str1=cell.getStringCellValue();

		// System.out.println(sheet.getLastRowNum());//我期望是上班，下班，上班，下班

		for (int i = 13; i <= sheet.getLastRowNum(); i++) {// 從13行循環到最後一行

			HSSFRow rowi = sheet.getRow((short) i);// 行

			if (i == 18 || i == 19 || i == 25 || i == 26 || i == 32 || i == 33

			|| i == 39 || i == 40) {

			} else {

				if (null == rowi) {

					// continue;

				} else {

					HSSFCell celli = rowi.getCell(col); // 上班時間

					if (null == celli) {

					} else {

						String str = getCellValue(celli);

						timeList.add(str);

					}

					HSSFCell celliRight = rowi.getCell(col + 2);// 下班時間

					if (null == celliRight) {

					} else {

						String strRight = getCellValue(celliRight);

						timeList.add(strRight);

					}

				}

			}

		}

		fis.close(); // 關閉文件輸入流

		for (String str : timeList) {

			System.out.print(str);

			System.out.print("|");

		}

		System.out.println();

		System.out.println(timeList.size());

		File outfile = new File("C:\\Users\\LYF\\Desktop\\我去.xls");

		FileInputStream fos = new FileInputStream(outfile);

		HSSFWorkbook outworkbook = new HSSFWorkbook(fos);

		HSSFSheet outsheet = outworkbook.getSheetAt(0);

		HSSFRow outrow = outsheet.getRow((short) outRowStart);// 行★這裏決定輸出的行數更改誰

		if (null == outrow) {

			// continue;

		} else {

			for (int i = 4; i <= 45; i++) {// 從13行循環到最後一行

				HSSFCell outcell = outrow.getCell(i); // 上班時間

				/*
				 * 
				 * if (null == outcell) { } else { String str =
				 * 
				 * getCellValue( outcell); System.out.println(str); }
				 */

				outcell.setCellValue(timeList.get(i - 4));

			}

		}

		FileOutputStream fos2 = new FileOutputStream(outfile);

		outworkbook.write(fos2);

		fos.close(); // 關閉文件輸出流

		// System.out.println("---------------------------------over");

	}

	private static String getCellValue(HSSFCell cell) {

		String cellValue = "";

		DecimalFormat df = new DecimalFormat("#");

		switch (cell.getCellType()) {

		case XSSFCell.CELL_TYPE_STRING:

			cellValue = cell.getRichStringCellValue().getString().trim();

			break;

		case XSSFCell.CELL_TYPE_NUMERIC:

			cellValue = df.format(cell.getNumericCellValue()).toString();

			break;

		case XSSFCell.CELL_TYPE_BOOLEAN:

			cellValue = String.valueOf(cell.getBooleanCellValue()).trim();

			break;

		case XSSFCell.CELL_TYPE_FORMULA:

			cellValue = cell.getCellFormula();

			break;

		default:

			cellValue = "";

		}

		return cellValue;

	}

	/**
	 * 
	 * @param args
	 */

	public static void main(String[] args) throws Exception {

		// 下面改成你自己的 xls文件進行測試，2003格式的，不能2007

		File file = new File("C:\\Users\\LYF\\Desktop\\標準報表2.xls");

		// 下面嘗試更改第一行第一列的單元格的值

		// UpdateExcel2003.updateExcel(file, 13, 16, 14, 5);// 1//16// 31,33//
		// 行★這裏決定數據源

		// UpdateExcel2003.updateExcel(file, 13, 31, 14, 9);//

		// 頁數，第幾段， 第幾行(第19頁)

		UpdateExcel2003.updateExcel(file, 12, 31, 14, 6);// 

		UpdateExcel2003.updateExcel(file, 14, 1, 14, 3);// 

		UpdateExcel2003.updateExcel(file, 14, 16, 14, 10);// 

		UpdateExcel2003.updateExcel(file, 6, 16, 14, 7);// 

		UpdateExcel2003.updateExcel(file, 15, 1, 14, 8);// 

	}

}