@Configuration
 @EnableResourceServer 
@EnableGlobalMethodSecurity(prePostEnabled = true) 
public class ResourceServer extends ResourceServerConfigurerAdapter {     

@Value("")     
private String tokenEndpointUrl;      

@Value("")     
private String clientId;      

@Value("")     
private String clientSecret;      

@Bean    
 public RemoteTokenServices tokenServices() throws KeyStoreException, NoSuchAlgorithmException, KeyManagementException {         
RemoteTokenServices tokenServices = new RemoteTokenServices();         tokenServices.setCheckTokenEndpointUrl(tokenEndpointUrl);         
tokenServices.setClientId(clientId);        
 tokenServices.setClientSecret(clientSecret);         
return tokenServices;     }     

 @Override     public void configure(HttpSecurity http) throws Exception {        
 http.cors().and()                
 .requestMatchers().antMatchers("/api/**").and().authorizeRequests().anyRequest().authenticated();    
 } }