我正在开发一款动态网页应用程序，我希望用户能够同时上传多个文件供应用程序使用。我不知道用户一次可能会上传多少个文件，可能是2个或者100多个文件。我刚开始接触JSP动态网页应用程序，从一个单独的上传文件开始，但我不确定该怎么做下去。我查看了一些例子，但没有找到确切符合我要求的内容。这是我现在的进展情况：
Servlet:
我正在寻找一种上传多个文件并在列表中显示它们的方法。
Servlet:
package Servlets;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
public class UploadServlet extends HttpServlet
{
private static final long serialVersionUID = 1L;
@Override
protected void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException
{
boolean isMultipart = ServletFileUpload.isMultipartContent(request);
response.setContentType("text/html");
PrintWriter out = response.getWriter();
if (isMultipart)
{
// Create a factory for disk-based file items
FileItemFactory factory = new DiskFileItemFactory();
// Create a new file upload handler
ServletFileUpload upload = new ServletFileUpload(factory);
try
{
// Parse the request
List items = upload.parseRequest(request);
Iterator iterator = items.iterator();
while (iterator.hasNext())
{
FileItem item = (FileItem) iterator.next();
if (!item.isFormField())
{
String fileName = item.getName();
String root = getServletContext().getRealPath("/");
File path = new File(root + "/uploads");
if (!path.exists())
{
boolean status = path.mkdirs();
}
File uploadedFile = new File(path + "/" + fileName);
System.out.println(uploadedFile.getAbsolutePath());
if(fileName!="")
item.write(uploadedFile);
else
out.println("file not found");
out.println("<h1>File Uploaded Successfully....:-)</h1>");
}
else
{
String abc = item.getString();
out.println("<br><br><h1>"+abc+"</h1><br><br>");
}
}
}
catch (FileUploadException e)
{
out.println(e);
}
catch (Exception e)
{
out.println(e);
}
}
else
{
out.println("Not Multipart");
}
}
}
JSP文件:
<form method="post" action="UploadServlet" enctype="multipart/form-data">
Select file to upload:
<p><input type="file" name="dataFile" id="fileChooser" />
<input type="submit" value="Upload" multiple="multiple" /></p>
</form>
我正在寻找一种上传多个文件并在列表中显示它们的方法。