springmvc多文件上传

 @RequestMapping(value = "/upload", method = RequestMethod.POST)
    public void upload(@RequestParam
    MultipartFile file,@RequestParam(required=false) Integer importFlag, HttpServletRequest request, HttpServletResponse response)
            throws IOException {
        // 如果只是上传一个文件，则只需要MultipartFile类型接收文件即可，而且无需显式指定@RequestParam注解
        // 如果想上传多个文件，那么这里就要用MultipartFile[]类型来接收文件，并且还要指定@RequestParam注解
        // 并且上传多个文件时，前台表单中的所有<input
        // type="file"/>的name都应该是myfiles，否则参数里的myfiles无法获取到所有上传的文件
        int flag = 0;
        String json;
        if (file.isEmpty()) {
            System.out.println("文件未上传");
        } else {
            // 如果用的是Tomcat服务器，则文件会上传到\\%TOMCAT_HOME%\\webapps\\YourWebProject\\WEB-INF\\upload\\文件夹中
              String realPath = request.getSession().getServletContext()
                    .getRealPath("/upload");
            // 这里不必处理IO流关闭的问题，因为FileUtils.copyInputStreamToFile()方法内部会自动把用到的IO流关掉，我是看它的源码才知道的
            File xlsFile = new File(realPath, file.getOriginalFilename());
            FileUtils.copyInputStreamToFile(file.getInputStream(), xlsFile);

            HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(
                    xlsFile));

            HSSFSheet sheet = workbook.getSheetAt(0);
            List<Salary> salaryList = new ArrayList<Salary>();
            Salary salary = null;
            HSSFRow row = null;

            for (int i = 2; i < sheet.getLastRowNum() + 1; i++) {

                row = sheet.getRow(i);
                salary = new Salary();
                //部门编号
                salary.setDeptCode(getCellValue(row.getCell(0)));
                //部门名
                salary.setDeptName(getCellValue(row.getCell(1)));
                //工号
                salary.setStaffCode(getCellValue(row.getCell(2)));
                //姓名
                salary.setRealName(getCellValue(row.getCell(3)));
                //岗资
                salary.setPostWage(getCellValue(row.getCell(4)));
                //薪资
                salary.setPay(getCellValue(row.getCell(5)));
                //绩效
                salary.setMeritPay(getCellValue(row.getCell(6)));
                // 岗位津贴
                salary.setTask(getCellValue(row.getCell(7)));
//                保留贴
                salary.setResponsibility(getCellValue(row.getCell(8)));
                 //课酬
                salary.setKeep(getCellValue(row.getCell(9)));
                 //其他
                salary.setNet(getCellValue(row.getCell(10)));
                 //补公积
                salary.setProvident(getCellValue(row.getCell(11)));
//                岗补
                salary.setBack(getCellValue(row.getCell(12)));
//                课补
                salary.setBack2(getCellValue(row.getCell(13)));

                //临补
                salary.setTemporyBack(getCellValue(row.getCell(14)));
                //应发额
                salary.setWages(getCellValue(row.getCell(15)));
//                    工会
                salary.setLabour(getCellValue(row.getCell(16)));
                //失业保险
                salary.setUnemployed(getCellValue(row.getCell(17)));
//                医疗保险
                salary.setMedical(getCellValue(row.getCell(18)));
//                扣公积
                salary.setDeductionProvident(getCellValue(row.getCell(19)));
//                扣一
                salary.setDeductionOne(getCellValue(row.getCell(20)));
                 //  扣
                salary.setReserved(getCellValue(row.getCell(21)));
//                    养老保险
                salary.setPension(getCellValue(row.getCell(22)));
                //税所得
                salary.setAfterTaxIncome(getCellValue(row.getCell(23)));
//                    所得税
                salary.setIncomeTax(getCellValue(row.getCell(24)));
                //Totaldeductio
                salary.setTotaldeduction(getCellValue(row.getCell(25)));
                //实发额
                salary.setHomepay(getCellValue(row.getCell(26)));
                salary.setYear(getCellValue(row.getCell(27)));
                salary.setMonth(getCellValue(row.getCell(28)));
                salary.setNote(getCellValue(row.getCell(29)));
                salaryList.add(salary);

            }

            if (salaryList.size() > 0) {
                flag = salaryService.insert(salaryList,importFlag);
                if (flag > 0) {
                    xlsFile.delete();

                }
            }
        }

        if (flag > 0) {
            json = "{\"success\":\"true\",\"msg\":\"导入成功!\"}";
        } else {
            json = "{\"success\":\"false\"}";
        }
        response.setContentType("text/html;charset=utf-8");

        try {
            response.getWriter().write(json);
            response.getWriter().flush();
            response.getWriter().close();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }