导入excel(xls格式, xlsx格式大部分都把类似HSSF替换成XSSF就行了，看api)

@RequestMapping(value = "/impExcel")
public String impExcel() {
	String result = "success";
	try{
		String path = "C:/Users/dulinan/Desktop/paopao.xls";
		File file = new File(path);
		InputStream is = new FileInputStream(file);
		HSSFWorkbook wb = new HSSFWorkbook(is);
		Date createTime = new Date();
		
		List<Teacher> list = new ArrayList<Teacher>();
		/*Map<String, Object> allMap = new HashMap<String, Object>();
		List<Teacher> duochuList = new ArrayList<Teacher>();*/
		int count = 0;
		for (int i = 0; i < 1; i++) {//遍历sheet，这里只有一个
			Sheet sheet = wb.getSheetAt(i);
			int subtotal = list.size();
			if (sheet != null) {
				int lastRowNum = sheet.getLastRowNum();
				for (int rowNum = sheet.getFirstRowNum() + 1; rowNum <= lastRowNum; rowNum++) {//遍历每一行
					HSSFRow row = (HSSFRow) sheet.getRow(rowNum);
					
					if (row == null) {
						continue;
					}
					
					Teacher teacher = new Teacher();
					String name = getCellValue(row.getCell(0));
					
					if (StringUtils.isBlank(name)) {
						continue;
					}
					
					String testNumber = getCellValue(row.getCell(1));
					String school = getCellValue(row.getCell(2));
					String subject = getCellValue(row.getCell(3));
					String email = getCellValue(row.getCell(4));
					String schoolarea = getCellValue(row.getCell(5));
					String classroom = getCellValue(row.getCell(6));
					String testTime = getCellValue(row.getCell(7));
					
					
					teacher.setOrderNumber(count++);
					teacher.setId(IdUtils.getId());
					teacher.setName(name);
					teacher.setTestNumber(testNumber);
					teacher.setEmail(email);
					teacher.setTeacherCode("不显示");
					teacher.setSchool(school);
					teacher.setGrade("不显示");
					teacher.setSubject(subject);
					teacher.setClasss("不显示");
					teacher.setSchoolarea(schoolarea);
					teacher.setClassroom(classroom);
					teacher.setTestTime(testTime);
					
					teacher.setCreateTime(createTime);
					list.add(teacher);
					/*
					if (allMap.containsKey(email)) {
						duochuList.add(teacher);
					} else {
						allMap.put(email, teacher);
					}*/
					
				}
				System.out.println(sheet.getSheetName() + " 共有 " + (list.size() - subtotal) + " 条数据");
			}
		}
		System.out.println("共有" + list.size() + "条数据");
		int code = teacherService.insertBatch(list);
		System.out.println(code);
		is.close();
	} catch(Exception e) {
		result = "fail";
		e.printStackTrace();
	}
	return result;
}

private String getCellValue(Cell cell) {
	if (cell != null) {
		if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
			// 返回布尔类型的值
			return String.valueOf(cell.getBooleanCellValue());
		} else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
			// 返回数值类型的值
			return String.valueOf(cell.getNumericCellValue());
		} else {
			// 返回字符串类型的值
			String value = String.valueOf(cell.getStringCellValue());
			return StringUtils.isNotBlank(value) ? value.replace("
", "<br />") : "";
		}
	} else {
		return "";
	}
	
}