read excel

public class ReadExcel {
	public static void main(String[] args) throws Exception {
		InputStream is = new FileInputStream(new File("c://SummaryHSSF.xls"));
		//根据输入流创建Workbook对象
		Workbook wb = WorkbookFactory.create(is);
		//get到Sheet对象
		Sheet sheet = wb.getSheetAt(0);
		//这个必须用接口
		for(Row row : sheet){
			for(Cell cell : row){
				//cell.getCellType是获得cell里面保存的值的type
				//如Cell.CELL_TYPE_STRING
				switch(cell.getCellType()){
					case Cell.CELL_TYPE_BOOLEAN:
						//得到Boolean对象的方法
						System.out.print(cell.getBooleanCellValue()+" ");
						break;
					case Cell.CELL_TYPE_NUMERIC:
						//先看是否是日期格式
						if(DateUtil.isCellDateFormatted(cell)){
							//读取日期格式
							System.out.print(cell.getDateCellValue()+" ");
						}else{
							//读取数字
							System.out.print(cell.getNumericCellValue()+" ");
						}
						break;
					case Cell.CELL_TYPE_FORMULA:
						//读取公式
						System.out.print(cell.getCellFormula()+" ");
						break;
					case Cell.CELL_TYPE_STRING:
						//读取String
						System.out.print(cell.getRichStringCellValue().toString()+" ");
						break;					
				}
			}
			System.out.println("");
		}
	}
}