[英]Using Apache commons FileUpload
这只是行不通的。 问题是我不知道该怎么办。 我无法调试此代码。 我想将上传内容存储到临时文件夹“ temp”,然后将其移至“ applets”。 请帮忙? 显然,正在访问servlet,但是我找不到上载的文件。
表单(使用脚本创建的表单-如果可能导致问题,我将其放在此处):
<%
out.write("<p>Upload a new game:</p>");
out.write("<form name=\"uploadForm\" action=\"game.jsp\" "
+ "method=\"POST\" enctype=\"multipart/form-data\">"
+ "<input type=\"file\" name=\"uploadSelect\" value=\"\" width=\"20\" />"
+ "<br><input type=\"submit\" value=\"Submit\" name=\"uploadSubmitButton\" "
+ "onclick = \"submitToServlet2('UploadGameServlet');\">"
+ "</form>");
%>
哪个调用此javascript:
function submitToServlet2(newAction)
{
document.uploadForm.action = newAction;
}
依次转到servlet(完整的代码,因为可能隐藏了一些重要的元素)
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 <code>GET</code> and <code>POST</code> 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("<html>");
out.println("<head>");
out.println("<title>Servlet UploadGameServlet</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Servlet UploadGameServlet at " + request.getContextPath () + "</h1>");
out.println("</body>");
out.println("</html>");
} finally {
out.close();
}
}
}
File repositoryPath = new File("\\temp");
File uploadedFile = new File("\\applets");
通过尝试不使用任何形式的前导路径或绝对路径来访问这些文件,您正在尝试写入当前工作目录下名为temp
和applets
文件(而非目录)。 在应用服务器中,当前的工作目录通常是bin
文件夹(取决于您使用的应用服务器等)。
一些建议:
Logger.getLogger(UploadGameServlet.class.getName())
引用! repositoryPath.getAbsolutePath()
的结果。
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