这不行.问题是我甚至不知道应该发生什么.我无法调试此代码.我想将上传存储到临时文件夹"temp",然后将它们移动到"applets".请帮忙？显然正在访问servlet,但我无法找到上传的文件...在此先感谢.

表单(使用scriptlet创建 - 如果可能导致问题,我将其放在此处):

<%
out.write("
Upload a new game:
");
                    out.write("
"
                    + ""
                    + "
"        
                    + "
");
 %>

哪个叫这个javascript:

function submitToServlet2(newAction)
    {
       document.uploadForm.action = newAction;
    }

反过来又转到servlet(代码包含在full中,因为可能有一些重要的元素隐藏)

package org.project;

import java.io.*;
import java.util.Iterator;
import java.util.List;
import java.util.logging.Level;
import java.util.logging.Logger;
// import servlet stuff
import org.apache.commons.fileupload.*;


public class UploadGameServlet extends HttpServlet {

/** 
* Processes requests for both HTTP GET and POST methods.
* @param request servlet request
* @param response servlet response
*/
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
    response.setContentType("text/html;charset=UTF-8");

    if (ServletFileUpload.isMultipartContent(request))
    {
        try 
        {
            // Create a factory for disk-based file items
            FileItemFactory factory = new DiskFileItemFactory();

            // Create a new file upload handler
            ServletFileUpload upload = new ServletFileUpload(factory);

            // Parse the request
            List items = upload.parseRequest(request); /* FileItem */

            File repositoryPath = new File("\\temp");
            DiskFileItemFactory diskFileItemFactory = new DiskFileItemFactory();
            diskFileItemFactory.setRepository(repositoryPath);

            Iterator iter = items.iterator();
            while (iter.hasNext()) 
            {
                FileItem item = (FileItem) iter.next();
                File uploadedFile = new File("\\applets");
                item.write(uploadedFile);
            }            
        }
        catch (FileUploadException ex) 
        {
            Logger.getLogger(UploadGameServlet.class.getName()).log(Level.SEVERE, null, ex);
        }
        catch (Exception ex) 
        {
            Logger.getLogger(UploadGameServlet.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    PrintWriter out = response.getWriter();
    try {
        out.println("");
        out.println("");
        out.println("");  
        out.println("");
        out.println("");
        out.println("
Servlet UploadGameServlet at " + request.getContextPath () + "
");
        out.println("");
        out.println("");
    } finally { 
        out.close();
    }
} 

}

File repositoryPath = new File("\\temp");
File uploadedFile = new File("\\applets");

通过尝试在没有任何前导或绝对路径的情况下访问这些文件,您尝试写入命名的文件(而不是目录)temp并applets在当前工作目录下.在应用服务器中,当前工作目录通常是bin文件夹(取决于您使用的应用服务器等).

一些建议:

使用绝对路径(最好存储在web.xml或属性文件中)来引用要保存文件的目录.

您必须指定要写入的文件的名称,您可能希望为每个请求创建某种随机/唯一名称.

保存一些键击并使用成员变量而不是所有Logger.getLogger(UploadGameServlet.class.getName())引用!

添加一些调试,尤其是查看您将数据写入的位置 - repositoryPath.getAbsolutePath()例如,记录结果.