Application.java

package demo;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer;
import org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerEndpointsConfigurer;
import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerSecurityConfigurer;
import org.springframework.security.oauth2.provider.token.store.JwtAccessTokenConverter;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@SpringBootApplication
@EnableResourceServer
@RestController
public class Application {

	public static void main(String[] args) {
		SpringApplication.run(Application.class, args);
	}

	@RequestMapping("/")
	public String home() {
		return "Hello World";
	}

	@Configuration
	@EnableAuthorizationServer
	protected static class OAuth2Config extends AuthorizationServerConfigurerAdapter {

		@Autowired
		private AuthenticationManager authenticationManager;

		@Bean
		public JwtAccessTokenConverter accessTokenConverter() {
			return new JwtAccessTokenConverter();
		}

		@Override
		public void configure(AuthorizationServerSecurityConfigurer oauthServer) throws Exception {
			oauthServer.tokenKeyAccess("isAnonymous() || hasAuthority('ROLE_TRUSTED_CLIENT')").checkTokenAccess(
					"hasAuthority('ROLE_TRUSTED_CLIENT')");
		}

		@Override
		public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
			endpoints.authenticationManager(authenticationManager).accessTokenConverter(accessTokenConverter());
		}

		@Override
		public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
			// @formatter:off
		 	clients.inMemory()
		        .withClient("my-trusted-client")
		            .authorizedGrantTypes("password", "authorization_code", "refresh_token", "implicit")
		            .authorities("ROLE_CLIENT", "ROLE_TRUSTED_CLIENT")
		            .scopes("read", "write", "trust")
		            .accessTokenValiditySeconds(60)
		            .refreshTokenValiditySeconds(160)
 		    .and()
		        .withClient("my-client-with-registered-redirect")
		            .authorizedGrantTypes("authorization_code")
		            .authorities("ROLE_CLIENT")
		            .scopes("read", "trust")
		            .redirectUris("http://anywhere?key=value")
 		    .and()
		        .withClient("my-client-with-secret")
		            .authorizedGrantTypes("client_credentials", "password")
		            .authorities("ROLE_CLIENT", "ROLE_TRUSTED_CLIENT")
		            .scopes("read", "write")
		            .secret("secret");
		// @formatter:on
		}

	}

}