SecurityInit：

@Order(1)
public class SecurityInitializer extends AbstractSecurityWebApplicationInitializer {
}

SecurityConfig

@EnableWebMvcSecurity
@EnableGlobalMethodSecurity(prePostEnabled=true)
@Component
@ComponentScan(basePackages = {"test.package"})
public class SecurityConfig extends 

WebSecurityConfigurerAdapter {

...
    @Autowired
    protected void registerAuthentication(UserDetailsService userDetailsService,AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService);
    }

//  http://stackoverflow.com/a/21100458/162345
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
                .csrf().disable()
                .headers().disable()
                .addFilterBefore(...)
                .addFilterBefore(...)

//                TODO: create a better way to differentiate login to signup
                .exceptionHandling()
                    .authenticationEntryPoint(noRedirectForAnonymous)
                    .and()

                .formLogin()
                    .successHandler(restAuthenticationSuccessHandler)
                    .failureHandler(restAuthenticationFailureHandler)
                    .and()

                .logout()
                    .logoutSuccessHandler(noRedirectlogoutSuccessHandler)
                    .and()

                .authorizeRequests()
                    .antMatchers("/api/keywords/**").permitAll()
                    .antMatchers("/api/**").authenticated();
    }
}