jsp保存图像输入的位置

Question

我正在使用Tomcat servlet - jsp

用户上传我保存在我的web包下的目录中的图像（我所有jsp页面的相同目录），然后只保留路径。

当图片上传时，我尝试通过img标签显示图片时，它们不会显示。但是，如果我更新类和资源或重新启动服务器，而不进行任何代码更改，则会显示图像。

是否有正确的位置来存储图像并避免此问题？或者我应该坚持图像本身？

谢谢！

我保存图片的代码：

@MultipartConfig
public class ChangeBrandImage extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
            throws ServletException, IOException {

    DatabaseManager databaseManager = (DatabaseManager) httpServletRequest.getSession().getAttribute("databaseManager");


    Part filePart = httpServletRequest.getPart("image");
    InputStream fileContent = filePart.getInputStream();

    OutputStream outputStream = null;

    Admin admin = databaseManager.getAdminDAO().getAdminByEmail(((SimplePrincipal)
            httpServletRequest.getSession().getAttribute("org.securityfilter.filter.SecurityRequestWrapper.PRINCIPAL")).getName());


    String imageName = Long.toString(System.currentTimeMillis()) + ".jpg";
    String path = admin.getBrand().getFolder_path() + "/" + imageName ;

    try {

        // write the inputStream to a FileOutputStream
        outputStream =
                new FileOutputStream(new File(path));

        int read = 0;
        byte[] bytes = new byte[1024];

        while ((read = fileContent.read(bytes)) != -1) {
            outputStream.write(bytes, 0, read);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (fileContent != null) {
            try {
                fileContent.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (outputStream != null) {
            try {
                // outputStream.flush();
                outputStream.close();
            } catch (IOException e) {
                e.printStackTrace();
            }

        }
    }

    Brand brand = admin.getBrand();

    BrandDAO brandDAO = databaseManager.getBrandDAO();
    brand.setBrand_photo(imageName);

    brandDAO.beginTransaction();
    brandDAO.update(brand);

    try {
        brandDAO.commitTransaction();
    } catch (DatabaseAccessFailException e) {
        e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
    } finally {
        httpServletResponse.sendRedirect("/secured/admins/adminIndex.jsp");
    }

}

@Override
protected void doGet(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
        throws ServletException, IOException {
}

@Override
protected void doDelete(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse)
        throws ServletException, IOException {

}

}

我怎么看：

HTML view