首先，我很抱歉我的英语不是很好。我试图上传一个图像作为文件。当我在eclipse中尝试它时，我的代码工作得很好，但当我在浏览器上运行它时就不行了。我认为问题是浏览器在base64中转换图像。因此，没有文件名，它无法读取数据并将其写入磁盘。

@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

    String name= request.getParameter("name");
    String description = request.getParameter("description");
    String prix = request.getParameter("prix");
    String image;

    String chemin = getInitParameter( CHEMIN);

    Part part = request.getPart("file");

   String fileName =Paths.get(part.getSubmittedFileName()).getFileName().toString();
   String fullPath = chemin + fileName;

    if ( fileName != null && !fileName.isEmpty() ) {

        fileName = fileName.substring( fileName.lastIndexOf( '/' ) + 1 )
                .substring( fileName.lastIndexOf( '\\' ) + 1 );

       fwrite( part, fileName, fullPath ); 
        File srcFile = new File( fullPath ); 
        byte [] buffer = new byte[ (int) srcFile.length() ];
        try ( FileInputStream inputStream = new FileInputStream( srcFile ) ) {
            inputStream.read( buffer );
        } 
    } 

    image = fullPath;

    manager.addBurger(name, description, prix, image);
    RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(VUE);
      dispatcher.forward(request, response);

}

我使用Java8，Tomcat8.5。你能帮帮我吗？我在很多论坛上搜索过，没有找到任何答案。