Question

表单是由javascript提交的，但是servlet向jsp返回一个null属性，我认为这行request.getRequestDispatcher（“views / Upload.jsp”）forward（request，response）没有运行。我留下代码：

Upload.jsp

   <form id="upload" method="post" action="../Upload_Servlet" enctype="multipart/form-data">

            <div id="drop">
                Drop Here

                <a>Browse</a>
                <input type="file" id="file" name="file"/>                                
                <input  name="fileName" id="fileName" type="text" style="visibility: hidden" value="<%=request.getAttribute("logotipo")%>">
            </div>

            <ul>
                <!-- The file uploads will be shown here -->
            </ul>
            <div id="tudiv"></div>
            <input type="button" id="Aceptar" value="Aceptar">

        </form>

Upload_Servlet.java

          if (!fi.isFormField()) {
          // Get the uploaded file parameters
          String fieldName = fi.getFieldName();

          String fileName = Math.floor(Math.random() * (1000 - 1) + 1) + fi.getName();
          request.setAttribute("logotipo", fileName);
          String contentType = fi.getContentType();
          boolean isInMemory = fi.isInMemory();
          long sizeInBytes = fi.getSize();
          // Write the file
          if (fileName.lastIndexOf("\\") >= 0) {
              file = new File(filePath
                      + fileName.substring(fileName.lastIndexOf("\\")));
          } else {
              file = new File(filePath
                      + fileName.substring(fileName.lastIndexOf("\\") + 1));
          }
          fi.write(file);
          out.println("Archivo subido: " + fileName + "<br>");
          request.getRequestDispatcher("vistas/Upload.jsp").forward(request, response);
      }

的script.js

    $('#upload').fileupload({

    // This element will accept file drag/drop uploading
    dropZone: $('#drop'),

    // This function is called when a file is added to the queue;
    // either via the browse button, or via drag/drop:
    add: function (e, data) {

        var tpl = $('<li class="working"><input type="text" value="0" data-width="48" data-height="48"'+
            ' data-fgColor="#0788a5" data-readOnly="1" data-bgColor="#3e4043" /><p></p><span></span></li>');

        // Append the file name and file size
        tpl.find('p').text(data.files[0].name)
                     .append('<i>' + formatFileSize(data.files[0].size) + '</i>');


        // Add the HTML to the UL element
        data.context = tpl.appendTo(ul);

        // Initialize the knob plugin
        tpl.find('input').knob

如何从servlet向jsp发送参数？

0 个答案: