Web development exception: Java. Lang. classnotfoundexception

• Start the Tomcat server on the eclipse server to run the web project. An exception occurs.

Java. Lang. classnotfoundexception

Information: Set web app root system property:
'Webapp. root' =[F: \ work_space_soft \. Metadata \. plugins \ org. Eclipse. WST. server. Core \ tmp0 \ wtpwebapps \ lottes_03_14 \]3:14:43Org. Apache. Catalina. Core. applicationcontext log information: initializing log4j from
[F: \ work_space_soft \. Metadata \. plugins \ org. Eclipse. WST. server. Core \ tmp0 \ wtpwebapps \ lottes_03_14 \ Web-INF \ conf \ log4j. xml]3:14:44Org. Apache. Catalina. Core. standardcontext filterstart: exception starting filter user authentication filterJava. Lang. classnotfoundexception: COM. Soft. Web. Filter. userauthenfilter
 

 

• • Exception parsing: the Java compilation file (. Class) is not found
  • Cause tracing:
    • View the output location of the web Project compilation file:

• • • Check the class file in the corresponding location. The class file does not exist in the following directory.
  • Solution:

• • • Refresh the project and re-compile the WEB Project.
    • The following error message is displayed on the console:

Delete -- force F:/soft/03_14/webroot/WEB-INF/classes/System. properties path is not a working copy directorysvn:'F: \ soft \ 03_14 \ webroot \ WEB-INF \ Classes \ system. properties' is not a working copy
 

• • • Delete the above files and re-compile the project.
    • Until you confirm that there is a class file in the corresponding position of the web project.
    • Redeploy the WEB Project within the eclipse development tool.
    • Restart Tomcat server again. This exception does not occur. Problem solved.