Difference between @EnableWebSecurity @EnableGlobalMethodSecurity @EnableAuthorizationServer @EnableResourceServer?

What's the difference between @EnableWebSecurity @EnableGlobalMethodSecurity @EnableAuthorizationServer  @EnableResourceServer?

@EnableWebSecurity and @EnableGlobalMethodSecurity is used for Spring Security and @EnableAuthorizationServer and @EnableResourceServer are used for OAuth 2 Security in Spring.

1. @EnableWebSecurity configures spring security from the class WebSecurityConfigurerAdapter.

@Configuration

@EnableWebSecurity

public class SecurityConfig extends WebSecurityConfigurerAdapter {

  ------

}

2. @EnableGlobalMethodSecurity secures service methods. 

@Configuration

@EnableWebSecurity

@EnableGlobalMethodSecurity(securedEnabled=true, prePostEnabled=true)

public class SecurityConfig extends WebSecurityConfigurerAdapter {

  ------

}

Now our service method can use @PreAuthorize, @PostAuthorize and @Secured annotations.

3. OAuth 2 annotation for enabling an Authorization Server. The @EnableAuthorizationServer annotation is used to configure the OAuth 2.0 Authorization Server mechanism.

@SpringBootApplication

@RestController

@EnableOAuth2Client

@EnableAuthorizationServer

public class SocialApplication extends WebSecurityConfigurerAdapter {

------

}

4. OAuth 2 annotation for Resource Servers. The @EnableResourceServer annotation creates a security filter.

@Configuration

@EnableResourceServer

protected static class ResourceServerConfiguration

    extends ResourceServerConfigurerAdapter {

  ------

}