-1

I am trying to run a servlet fileupload example in tomcat 7 which is based on org.apache.commons.fileupload

i complied servlet class file in CMD (Win 7 64bit) by using this command.

 C:\Users\Preet\Desktop>javac -cp .;E:/servlet-api.jar;"C:\Program Files\Apache S
oftware Foundation\Tomcat 7.0\webapps\sim\WEB-INF\lib\commons-fileupload-1.2.2.j
ar" "C:\Program Files\Apache Software Foundation\Tomcat 7.0\webapps\sim\WEB-INF\
classes\SimpleServlets.java"

Everything was fine.

After compiling i tried my example i got a error which is 

exception

javax.servlet.ServletException: Servlet execution threw an exception
root cause

java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
    org.apache.commons.fileupload.servlet.ServletFileUpload.isMultipartContent(ServletFileUpload.java:68)
    SimpleServlets.doPost(SimpleServlets.java:21)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:647)
    javax.servlet.http.HttpServlet.service(HttpServlet.java:728)

then at last googling, found few solution and i followed them one by one.

1.Made a lib folder in WEB-INF and copied commons-fileupload-1.2.2 and commons-io-2.2. But no luck.

2.Copied commons-fileupload-1.2.2 and commons-io-2.2 in tomcat/lib. But no luck.

3.Add commons-fileupload-1.2.2 and commons-io-2.2 to classpaath but no luck.

Please tell me what is wrong.

My code 

import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.FileItemFactory;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;

import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import java.io.IOException;
import java.io.File;
import java.util.List;
import java.util.Iterator;

public class SimpleServlets extends HttpServlet {
    private static final long serialVersionUID = -3208409086358916855L;

    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        boolean isMultipart = ServletFileUpload.isMultipartContent(request);

        if (isMultipart) {
            FileItemFactory factory = new DiskFileItemFactory();
            ServletFileUpload upload = new ServletFileUpload(factory);

            try {
                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());
                        item.write(uploadedFile);
                    }
                }
            } catch (FileUploadException e) {
                e.printStackTrace();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}
4

1 回答 1

1

您缺少javax.servlet.http.HttpServletRequestservlet-api.jar 中存在的 。这就是您需要包含在部署的解决方案中的那个。

查看findjar.com，它会告诉您哪些 jar 包含给定的类。它不能帮助您解决所需的版本号，但它会为您指明正确的方向。

于 2013-02-11T14:43:27.613 回答