仅上传图片文件_春天

Question

我已经开始了一个简单的网站项目来学习Spring。我试图检查文件扩展名并仅在电路板上上传图像文件。所以我在上传文件之前添加了if else语句，但它看起来似乎工作正常。 我的代码如下：

@Controller
public class FileUploadController {
@RequestMapping("/write")
public String write(HttpServletRequest request, @RequestParam("bFile") MultipartFile bFile, Model model) {
    System.out.println("writeDao()");

    String savePath = request.getSession().getServletContext().getRealPath("/fileUpload");

    String originalFName = bFile.getOriginalFilename();
    String onlyFName = originalFName.substring(0, originalFName.indexOf("."));
    String extension = originalFName.substring(originalFName.indexOf(".")); // .jpg
    String rename = onlyFName + "_" + getCurrentDayTime() + extension; // fileName_20150721-14-07-50.jpg
    String fullPath = savePath + "\\" + rename;

    if(!bFile.getContentType().equals("images/jpeg")) {
        try{
            byte[] bytes = bFile.getBytes();
            BufferedOutputStream stream = new BufferedOutputStream(new FileOutputStream(new File(fullPath)));               
            stream.write(bytes);

            stream.close();

            System.out.println("Success to upload file");

        } catch (Exception e) {
            System.out.println("Fail to upload file");

        }

    } else {
           System.out.println("Choose file to upload");
    }

    String bPwd = request.getParameter("bPwd");
    BoardDao dao = sqlSession.getMapper(BoardDao.class);
    dao.writeDao(pwd, rename, fullPath);

    return "redirect:list";
}


//file upload.jsp
<form action="write" method="post" enctype="multipart/form-data">
<tr>
    <td> File </td>
    <td> <input type="file" multiple accept='image/*'  name="bFile" size = "50"> </td>
</tr>   
</form>