springboot2.x实现oauth2授权码登陆的方法

@Override
public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
clients.inMemory()
.withClient(ClientID)
.secret(passwordEncoder.encode(ClientSecret))
.authorizedGrantTypes("authorization_code", "refresh_token",
"password", "implicit")
.scopes("read","write","del","userinfo")
.redirectUris(RedirectURLs);
}

@Override
public void configure(AuthorizationServerSecurityConfigurer oauthServer) throws Exception {
oauthServer.tokenKeyAccess("permitAll()")
.checkTokenAccess("isAuthenticated()")
.allowFormAuthenticationForClients();//支持把secret和clientid写在url上，否则需要在头上
}

Authorization Ccode------RFRLFY
access_token_url http://localhost:8081/oauth/token?client_id=android1&code=RFRLFY&grant_type=authorization_code&redirect_uri=http://localhost:8081/callback&client_secret=android1
Access Token Response ---------{"access_token":"faadf3bf-6488-4036-bc3b-21b0a979602c","token_type":"bearer","refresh_token":"1b01f133-c5ab-419f-8125-088c85916ecb","expires_in":43187,"scope":"read"}

@Controller
public class UserController {
 @RequestMapping(value = "/callback", method = RequestMethod.GET)
 public ResponseEntity<String> callback(@RequestParam("code") String code) throws JsonProcessingException, IOException {
  ResponseEntity<String> response = null;
  System.out.println("Authorization Ccode------" + code);
  RestTemplate restTemplate = new RestTemplate();
  String access_token_url = "http://localhost:8081/oauth/token";
  access_token_url += "?client_id=android1&code=" + code;
  access_token_url += "&grant_type=authorization_code";
  access_token_url += "&redirect_uri=http://localhost:8081/callback";
  access_token_url += "&client_secret=android1";
  System.out.println("access_token_url " + access_token_url);
  response = restTemplate.exchange(access_token_url, HttpMethod.POST, null, String.class);
  ObjectMapper mapper = new ObjectMapper();
  JsonNode node = mapper.readTree(response.getBody());
  String token = node.path("access_token").asText(); System.out.println("access_token" +access_token);
  String url = "http://localhost:8081/index"; HttpHeaders headers1 = new HttpHeaders(); headers1.add("Authorization", "Bearer " + token); HttpEntity<String> entity = new HttpEntity<>(headers1); ResponseEntity<String> result = restTemplate.exchange(url, HttpMethod.GET, entity, String.class); return result; }