How to solve this java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream?
Solution 1
The particular exception message is telling you that the mentioned class is missing in the classpath. As the org.apache.commons.io
package name hints, the mentioned class is part of the http://commons.apache.org/io
project.
And indeed, Commons FileUpload has Commons IO as a dependency. You need to download and drop commons-io.jar
in the /WEB-INF/lib
as well.
See also:
- How to upload files to server using JSP/Servlet?
- How to add JAR libraries to WAR project without facing java.lang.ClassNotFoundException? Classpath vs Build Path vs /WEB-INF/lib
- How do I import the javax.servlet API in my Eclipse project?
Solution 2
use maven dependency
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-io</artifactId>
<version>1.3.2</version>
</dependency>
or download commons-io.1.3.2.jar to your lib folder
Solution 3
Solution
By default, Struts is using Apache “commons-io.jar” for its file upload process. To fix it, you have to include this library into your project dependency library folder.
- Get Directly
Get “commons-io.jar” from official website – http://commons.apache.org/io/
- Get From Maven
The prefer way is get the “commons-io.jar” from Maven repository
File : pom.xml
<dependency>
<groupId>commons-io</groupId>
<artifactId>commons-io</artifactId>
<version>1.4</version>
</dependency>
Solution 4
just put all apache comons jar and file upload jar in lib folder of tomcat
Solution 5
If you are receiving this error in a WebSphere container, then make sure you set your Apps class loading policy correctly. I had to change mine from the default to 'parent last' and also ‘Single class loader for application’ for the WAR policy. This is because in my case the commons-io*.jar was packaged with in the application, so it had to be loaded first.
Joe
Updated on July 19, 2020Comments
-
Joe almost 4 years
I am using the below code to upload a file in to tomcat5.5 and it gives me the following exception
java.lang.NoClassDefFoundError: org/apache/commons/io/output/DeferredFileOutputStream
could you please help me to find it out?
import java.io.File; import java.io.IOException; 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; /** * Servlet implementation class FileUploadServlet */ public class FileUploadServlet extends HttpServlet { private static final long serialVersionUID = 1L; /** * @see HttpServlet#HttpServlet() */ public FileUploadServlet() { super(); // TODO Auto-generated constructor stub } /** * @see HttpServlet#doGet(HttpServletRequest request, HttpServletResponse response) */ @SuppressWarnings("rawtypes") protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { } /** * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response) */ protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub boolean isMultipart = ServletFileUpload.isMultipartContent(request); System.out.println("Status : "+isMultipart); 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(); } } response.sendRedirect("upload.jsp"); } }
this is the jar i use
commons-fileupload-1.2.2.jar