Android应用读取Excel文件

出处：http://edison-cool911.iteye.com/blog/883836

jar包：http://download.csdn.net/detail/gotoac/5116001

public class ReadExcel extends Activity {
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		// createExcel();
		// readExcel();
		writeExcel("mnt/sdcard/test.xls");
	}

	public void readExcel() {
		try {

			/**
			 * 后续考虑问题,比如Excel里面的图片以及其他数据类型的读取
			 **/
			InputStream is = new FileInputStream("mnt/sdcard/test.xls");

			Workbook book = Workbook
					.getWorkbook(new File("mnt/sdcard/test.xls"));
			book.getNumberOfSheets();
			// 获得第一个工作表对象
			Sheet sheet = book.getSheet(0);
			int Rows = sheet.getRows();
			int Cols = sheet.getColumns();
			System.out.println("当前工作表的名字:" + sheet.getName());
			System.out.println("总行数:" + Rows);
			System.out.println("总列数:" + Cols);
			for (int i = 0; i < Cols; ++i) {
				for (int j = 0; j < Rows; ++j) {
					// getCell(Col,Row)获得单元格的值
					System.out
							.print((sheet.getCell(i, j)).getContents() + "\t");
				}
				System.out.print("\n");
			}
			// 得到第一列第一行的单元格
			Cell cell1 = sheet.getCell(0, 0);
			String result = cell1.getContents();
			System.out.println(result);
			book.close();
		} catch (Exception e) {
			System.out.println(e);
		}
	}

	public void createExcel() {
		try {
			// 创建或打开Excel文件
			WritableWorkbook book = Workbook.createWorkbook(new File(
					"mnt/sdcard/test.xls"));

			// 生成名为“第一页”的工作表,参数0表示这是第一页
			WritableSheet sheet1 = book.createSheet("第一页", 0);
			WritableSheet sheet2 = book.createSheet("第三页", 2);

			// 在Label对象的构造函数中,元格位置是第一列第一行(0,0)以及单元格内容为test
			Label label = new Label(0, 0, "test");

			// 将定义好的单元格添加到工作表中
			sheet1.addCell(label);

			/*
			 * 生成一个保存数字的单元格.必须使用Number的完整包路径,否则有语法歧义
			 */
			jxl.write.Number number = new jxl.write.Number(1, 0, 555.12541);
			sheet2.addCell(number);

			// 写入数据并关闭文件
			book.write();
			book.close();
		} catch (Exception e) {
			System.out.println(e);
		}
	}

	/**
	 * jxl暂时不提供修改已经存在的数据表,这里通过一个小办法来达到这个目的,不适合大型数据更新! 这里是通过覆盖原文件来更新的.
	 * 
	 * @param filePath
	 */
	public void updateExcel(String filePath) {
		try {
			Workbook rwb = Workbook.getWorkbook(new File(filePath));
			WritableWorkbook wwb = Workbook.createWorkbook(new File(
					"d:/new.xls"), rwb);// copy
			WritableSheet ws = wwb.getSheet(0);
			WritableCell wc = ws.getWritableCell(0, 0);
			// 判断单元格的类型,做出相应的转换
			Label label = (Label) wc;
			label.setString("The value has been modified");
			wwb.write();
			wwb.close();
			rwb.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void writeExcel(String filePath) {
		try {
			// 创建工作薄
			WritableWorkbook wwb = Workbook.createWorkbook(new File(filePath));
			// 创建工作表
			WritableSheet ws = wwb.createSheet("Sheet1", 0);
			// 添加标签文本
			// Random rnd = new Random((new Date()).getTime());
			// int forNumber = rnd.nextInt(100);
			// Label label = new Label(0, 0, "test");
			// for (int i = 0; i < 3; i++) {
			// ws.addCell(label);
			// ws.addCell(new jxl.write.Number(rnd.nextInt(50), rnd
			// .nextInt(50), rnd.nextInt(1000)));
			// }
			// 添加图片(注意此处jxl暂时只支持png格式的图片)
			// 0,1分别代表x,y 2,5代表宽和高占的单元格数
			ws.addImage(new WritableImage(5, 5, 2, 5, new File(
					"mnt/sdcard/nb.png")));
			wwb.write();
			wwb.close();
		} catch (Exception e) {
			System.out.println(e.toString());
		}
	}
}