I inherited several projects Javas in my new job, but I\'m having some problems with settings. I\'m facing a problem that is researched so common. \"java.lang.NoClassDefFoun
To add jars in eclipse you have two options:
Right click on project got to properties-->click on java build path --> configure build path--> Libraries --> and select add external jars button. It will open a window where you can add all your jars required.
Second option is to paste jars directly to lib folder. lib folder is in Web Content --> WEB-INF --> lib.
Use any one of them.