Problem

In Struts framework, hit the following exception in file upload process.

javax.servlet.ServletException: Servlet execution threw an exception
 
root cause
 
java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileUploadException
	java.lang.Class.getDeclaredConstructors0(Native Method)
	java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
	java.lang.Class.getConstructor0(Unknown Source)
	java.lang.Class.newInstance0(Unknown Source)
	java.lang.Class.newInstance(Unknown Source)

Solution

Struts is using the “commons-fileupload.jar” library for the file upload process. You have to include this library into your project dependency library folder.

1. Get “commons-fileupload.jar” from official website – http://commons.apache.org/fileupload/

2. Get “commons-fileupload.jar” from Maven repository

   <dependency>
      <groupId>commons-fileupload</groupId>
	  <artifactId>commons-fileupload</artifactId>
      <version>1.2.1</version>
    </dependency>
Note : You can find more similar articles at - Struts 1.x Tutorials
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