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File Upload Servlet problem
Hi everyone,
i have problem with servlet for upload files,every help will be much appreciated.
I am using the Apache API for uploading files.My original servlet is longer than what i will paste here,but i think that if i understand the problem of the short servlet here, i will fix it for my main servlet.The short servlet is this:
import org.apache.commons.fileupload.*;
import org.apache.commons.fileupload.disk.*;
import org.apache.commons.fileupload.servlet.*;
import org.apache.commons.fileupload.util.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.io.*;
public class TestUploadFiles extends HttpServlet {
public void doGet(javax.servlet.http.HttpServletRequest aRequest , HttpServletResponse aResponse)
throws ServletException , IOException
{
HttpSession session1 = aRequest.getSession();
// boolean isMultipart = ServletFileUpload.isMultipartContent( new ServletRequestContext(aRequest) );
boolean isMultipart = ServletFileUpload.isMultipartContent( aRequest );
}
public void doPost(HttpServletRequest aRequest , HttpServletResponse aResponse )
throws ServletException , IOException
{
doGet(aRequest,aResponse);
}
}
The html form that i am using is this:
<html>
<head>
<title> Upload File Form </title>
</head>
<body>
aaa
<form method=post enctype="multipart/form-data" action="TestUploadFiles">
File to upload: <input type=file name="upfile"><br>
<input type=submit value="Submit">
</form>
</body>
</html>
When i am starting the form on Tomcat , the form appears on the screen, then i push the Browse button and choose a file from the harddisk, then i press the Submit button and i get exception:
javax.servlet.ServletException: Servlet execution threw an exception
root cause
java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
org.apache.commons.fileupload.servlet.ServletFileU pload.isMultipartContent(ServletFileUpload.java:68 )
TestUploadFiles.doGet(TestUploadFiles.java:20)
TestUploadFiles.doPost(TestUploadFiles.java:26)
javax.servlet.http.HttpServlet.service(HttpServlet .java:637)
javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
Then i decided to change the row boolean isMultipart = ServletFileUpload.isMultipartContent( aRequest ); with a
boolean isMultipart = ServletFileUpload.isMultipartContent( new ServletRequestContext(aRequest) );
The result when it is executed from the html from (when i choose file from the harddisk and press submit) is exception again, this time it is:
javax.servlet.ServletException: Servlet execution threw an exception
root cause
java.lang.NoClassDefFoundError: javax/servlet/ServletInputStream
TestUploadFiles.doGet(TestUploadFiles.java:20)
TestUploadFiles.doPost(TestUploadFiles.java:26)
javax.servlet.http.HttpServlet.service(HttpServlet .java:637)
javax.servlet.http.HttpServlet.service(HttpServlet .java:717)
For me it is quite strange, i have been dealing with this problem for 2 days and can't figure the problem.
I have tried to check for the first case if aRequest is null, well - it is not, i have check for the servlet-api.jar - it is in my classpath, it is in the lib directory of tomcat, i have added it and to the lib folder of the webapplication of the file upload servlet that i am writing, i have opened servlet-api.jar and inside everything looks ok, there is HttpServletRequest.Then i checked for commons-fileupload-1.2.1.jar and commons-io-1.4.jar that i downloaded from apache file upload api site - these jars are also in my classpath, they are in the lib directory of Tomcat, finally i added them to the lib folder of the web application - nothing changed. The web.xml file in WEB-INF is in my opinion ok,similar to this in every other web application that i have done.The Tomcat version that i am using is 6.0.18, the file upload api from apache site are the last versions.Btw HttpServletRequest is found in a web application where i don use apache file upload api, i mean i can take parameters from forms,etc, it's ok in my opinion. Please give your opinions,no matter what they are.
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