Spring Security NoClassDefFoundError

Question

Working on a Spring project and am learning to use Spring Security. The project was working but has suddenly decided no to. Can anyone shed some light as to why?

Web

Answer 1

Add dependency

    
        org.springframework.security
        spring-security-web
        4.0.1.RELEASE
    

Or gradle

dependencies {  
  compile 'org.springframework.security:spring-security-web:4.0.1.RELEASE'
}