java生成一个Excel文件

HSSFWorkbook workbook = new HSSFWorkbook();
		Sheet sheet = workbook.createSheet();
		OutputStream out = null;
		try {
			String path = "C:\\Users\\12449\\Desktop\\测试.xls";
			out = new FileOutputStream(path);
			workbook.write(out);
		} catch (IOException e) {
			//waitingDialog.setVisible(false);
			// TODO Auto-generated catch block
			e.printStackTrace();
			try {
				out.close();
			} catch (IOException e1) {
				// TODO Auto-generated catch block
				e1.printStackTrace();
				throw new RuntimeException(e1.getMessage());
			}
		}finally{
			try {
				out.close();
			} catch (IOException e) {
				//waitingDialog.setVisible(false);
				// TODO Auto-generated catch block
				e.printStackTrace();
				throw new RuntimeException(e.getMessage());
			}
		}

　　注意：这个的excel文件后缀要是.xls，如果是.xlsx，在打开的时候会报格式错误！