http://localhost:8082/app/helloworld

http://localhost:8082/app/oauth/token?grant_type=password&client_id=restapp&client_secret=restapp&username=**USERNAME**&password=**PASSWORD**

http://localhost:8082/app/helloworld/?access_token=**4855f557-c6ee-43b7-8617-c24591965206**

BaseOAuth2ProtectedResourceDetails baseOAuth2ProtectedResourceDetails =  new BaseOAuth2ProtectedResourceDetails();
baseOAuth2ProtectedResourceDetails.setClientId("restapp");
baseOAuth2ProtectedResourceDetails.setClientSecret("restapp");
baseOAuth2ProtectedResourceDetails.setGrantType("password");
// how to set user name and password ???

DefaultAccessTokenRequest accessTokenRequest = new DefaultAccessTokenRequest();
OAuth2ClientContext oAuth2ClientContext = new DefaultOAuth2ClientContext(accessTokenRequest());

OAuth2RestTemplate restTemplate = new OAuth2RestTemplate(baseOAuth2ProtectedResourceDetails,oAuth2ClientContext);

@EnableOAuth2Client
@Configuration
class MyConfig{




    @Value("${oauth.resource:http://localhost:8082}")
    private String baseUrl;
    @Value("${oauth.authorize:http://localhost:8082/oauth/authorize}")
    private String authorizeUrl;
    @Value("${oauth.token:http://localhost:8082/oauth/token}")
    private String tokenUrl


    @Bean
    protected OAuth2ProtectedResourceDetails resource() {

        ResourceOwnerPasswordResourceDetails resource = new ResourceOwnerPasswordResourceDetails();

        List scopes = new ArrayList<String>(2);
        scopes.add("write");
        scopes.add("read");
        resource.setAccessTokenUri(tokenUrl);
        resource.setClientId("restapp");
        resource.setClientSecret("restapp");
        resource.setGrantType("password");
        resource.setScope(scopes);

        resource.setUsername("**USERNAME**");
        resource.setPassword("**PASSWORD**");

        return resource;
    }

    @Bean
    public OAuth2RestOperations restTemplate() {
        AccessTokenRequest atr = new DefaultAccessTokenRequest();

        return new OAuth2RestTemplate(resource(), new DefaultOAuth2ClientContext(atr));
    }

}

@Service
@SuppressWarnings("unchecked")
class MyService {
    @Autowired
    private OAuth2RestOperations restTemplate;

    public MyService() {

        restTemplate.getAccessToken();
    }
}

security:
  oauth2:
    client:
      clientId: 233668646673605
      clientSecret: 33b17e044ee6a4fa383f46ec6e28ea1d
      accessTokenUri: https://graph.facebook.com/oauth/access_token
      userAuthorizationUri: https://www.facebook.com/dialog/oauth
      tokenName: oauth_token
      authenticationScheme: query
      clientAuthenticationScheme: form
    resource:
      userInfoUri: https://graph.facebook.com/me

@Component
public class OAuthUser implements Serializable {

private static final long serialVersionUID = 1L;

private String authority;

@JsonIgnore
private String clientId;

@JsonIgnore
private String grantType;
private boolean isAuthenticated;
private Map<String, Object> userDetail = new LinkedHashMap<String, Object>();

@JsonIgnore
private String sessionId;

@JsonIgnore
private String tokenType;

@JsonIgnore
private String accessToken;

@JsonIgnore
private Principal principal;

public void setOAuthUser(Principal principal) {
    this.principal = principal;
    init();
}

public Principal getPrincipal() {
    return principal;
}

private void init() {
    if (principal != null) {
        OAuth2Authentication oAuth2Authentication = (OAuth2Authentication) principal;
        if (oAuth2Authentication != null) {
            for (GrantedAuthority ga : oAuth2Authentication.getAuthorities()) {
                setAuthority(ga.getAuthority());
            }
            setClientId(oAuth2Authentication.getOAuth2Request().getClientId());
            setGrantType(oAuth2Authentication.getOAuth2Request().getGrantType());
            setAuthenticated(oAuth2Authentication.getUserAuthentication().isAuthenticated());

            OAuth2AuthenticationDetails oAuth2AuthenticationDetails = (OAuth2AuthenticationDetails) oAuth2Authentication
                    .getDetails();
            if (oAuth2AuthenticationDetails != null) {
                setSessionId(oAuth2AuthenticationDetails.getSessionId());
                setTokenType(oAuth2AuthenticationDetails.getTokenType());

            // This is what you will be looking for
                setAccessToken(oAuth2AuthenticationDetails.getTokenValue());
            }

    // This detail is more related to Logged-in User
            UsernamePasswordAuthenticationToken userAuthenticationToken = (UsernamePasswordAuthenticationToken) oAuth2Authentication.getUserAuthentication();
            if (userAuthenticationToken != null) {
                LinkedHashMap<String, Object> detailMap = (LinkedHashMap<String, Object>) userAuthenticationToken.getDetails();
                if (detailMap != null) {
                    for (Map.Entry<String, Object> mapEntry : detailMap.entrySet()) {
                        //System.out.println("#### detail Key = " + mapEntry.getKey());
                        //System.out.println("#### detail Value = " + mapEntry.getValue());
                        getUserDetail().put(mapEntry.getKey(), mapEntry.getValue());
                    }

                }

            }

        }

    }
}


public String getAuthority() {
    return authority;
}

public void setAuthority(String authority) {
    this.authority = authority;
}

public String getClientId() {
    return clientId;
}

public void setClientId(String clientId) {
    this.clientId = clientId;
}

public String getGrantType() {
    return grantType;
}

public void setGrantType(String grantType) {
    this.grantType = grantType;
}

public boolean isAuthenticated() {
    return isAuthenticated;
}

public void setAuthenticated(boolean isAuthenticated) {
    this.isAuthenticated = isAuthenticated;
}

public Map<String, Object> getUserDetail() {
    return userDetail;
}

public void setUserDetail(Map<String, Object> userDetail) {
    this.userDetail = userDetail;
}

public String getSessionId() {
    return sessionId;
}

public void setSessionId(String sessionId) {
    this.sessionId = sessionId;
}

public String getTokenType() {
    return tokenType;
}

public void setTokenType(String tokenType) {
    this.tokenType = tokenType;
}

public String getAccessToken() {
    return accessToken;
}

public void setAccessToken(String accessToken) {
    this.accessToken = accessToken;
}

@Override
public String toString() {
    return "OAuthUser [clientId=" + clientId + ", grantType=" + grantType + ", isAuthenticated=" + isAuthenticated
            + ", userDetail=" + userDetail + ", sessionId=" + sessionId + ", tokenType="
            + tokenType + ", accessToken= " + accessToken + " ]";
}

@RestController
public class YourController {

@Autowired
OAuthUser oAuthUser;

// In case if you want to see Profile of user then you this
@RequestMapping(value = "/profile", produces = MediaType.APPLICATION_JSON_VALUE)
public OAuthUser user(Principal principal) {
    oAuthUser.setOAuthUser(principal);

    // System.out.println("#### Inside user() - oAuthUser.toString() = " + oAuthUser.toString());

    return oAuthUser;
}


@RequestMapping(value = "/createOrder",
        method = RequestMethod.POST,
        headers = {"Content-type=application/json"},
        consumes = MediaType.APPLICATION_JSON_VALUE,
        produces = MediaType.APPLICATION_JSON_VALUE)
public FinalOrderDetail createOrder(@RequestBody CreateOrder createOrder) {

    return postCreateOrder_restTemplate(createOrder, oAuthUser).getBody();
}


private ResponseEntity<String> postCreateOrder_restTemplate(CreateOrder createOrder, OAuthUser oAuthUser) {

String url_POST = "your post url goes here";

    MultiValueMap<String, String> headers = new LinkedMultiValueMap<>();
    headers.add("Authorization", String.format("%s %s", oAuthUser.getTokenType(), oAuthUser.getAccessToken()));
    headers.add("Content-Type", "application/json");

    RestTemplate restTemplate = new RestTemplate();
    //restTemplate.getMessageConverters().add(new MappingJackson2HttpMessageConverter());

    HttpEntity<String> request = new HttpEntity<String>(createOrder, headers);

    ResponseEntity<String> result = restTemplate.exchange(url_POST, HttpMethod.POST, request, String.class);
    System.out.println("#### post response = " + result);

    return result;
}


}

public ResourceOwnerPasswordResourceDetails() {
    setGrantType("password");
}

@EnableOAuth2Client
@Configuration
class MyConfig {

@Value("${security.oauth2.client.access-token-uri}")
private String tokenUrl;

@Value("${security.oauth2.client.client-id}")
private String clientId;

@Value("${security.oauth2.client.client-secret}")
private String clientSecret;

@Value("${security.oauth2.client.password-token}")
private String passwordToken;

@Value("${security.user.name}")
private String username;

@Value("${security.user.password}")
private String password;


@Bean
protected OAuth2ProtectedResourceDetails resource() {

    ResourceOwnerPasswordResourceDetails resource = new ResourceOwnerPasswordResourceDetails();

    resource.setAccessTokenUri(tokenUrl);
    resource.setClientId(clientId);
    resource.setClientSecret(clientSecret);
    resource.setClientAuthenticationScheme(AuthenticationScheme.form);
    resource.setUsername(username);
    resource.setPassword(password + passwordToken);

    return resource;
}

@Bean
 public OAuth2RestOperations restTemplate() {
    return new OAuth2RestTemplate(resource(), new DefaultOAuth2ClientContext(new DefaultAccessTokenRequest()));
    }
}


@Service
@SuppressWarnings("unchecked")
class MyService {
    @Autowired
    private OAuth2RestOperations restTemplate;

    public MyService() {
        restTemplate.getAccessToken();
    }
}