使用jxl对excel文件进行简单的读写操作。

//    读excel文件中的数据在控制台输出
public class readExcel {
	public static void main(String[] args) throws IOException, BiffException {
		// 1.获取工作簿
		File file = new File("C:\\\\Users\\\\Administrator\\\\Desktop\\\\practise.xls");
		Workbook wb = Workbook.getWorkbook(file);
		// 2.获取sheet页
		Sheet sheet = wb.getSheet("student");
		// 3.获取单元格数据
		Cell cell = null;
		// getRows获取行数    getColumns获取列数
		for (int i = 0; i < sheet.getRows(); i++) {
			for (int j = 0; j < sheet.getColumns(); j++) {
				cell = sheet.getCell(j, i);
				System.out.print(cell.getContents() + "\t");
			}
			System.out.println("");
		}
	}
}

//将数据写入excel文件中
public class writeExcel {
	public static void main(String[] args) throws IOException, BiffException, RowsExceededException, WriteException {
		//定位到user文件，不存在时创建一个
		File file = new File("C:\\\\Users\\\\Administrator\\\\Desktop\\\\user.xls");
		if (!file.exists()) {
			file.createNewFile();
		}
		// 1.创建工作簿
		WritableWorkbook wb = Workbook.createWorkbook(file);
		// 2.创建sheet页
		WritableSheet sheet = wb.createSheet("student", 0);
		// 3.创建单元格并写入
		Label label1 = new Label(0, 0, "id");
		Label label2 = new Label(1, 0, "name");
		Label label3 = new Label(2, 0, "score");
		sheet.addCell(label1);
		sheet.addCell(label2);
		sheet.addCell(label3);
	}
}