Spring Cloud整合Spring Security Oauth2

整合Spring Cloud和Spring Security OAuth2通常涉及到以下几个步骤：

1. 创建认证服务器（Authorization Server）：使用Spring Security和Spring Security OAuth2提供OAuth2认证服务。
2. 创建资源服务器（Resource Server）：验证访问令牌并保护受保护的资源。
3. 配置客户端：在认证服务器中注册客户端以获取访问令牌。

以下是一个简化的例子，展示如何创建一个简单的认证服务器和资源服务器。

认证服务器配置：

@Configuration
@EnableAuthorizationServer
public class AuthServerConfig extends AuthorizationServerConfigurerAdapter {
 
    @Autowired
    private AuthenticationManager authenticationManager;
 
    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.inMemory()
            .withClient("client")
            .secret("secret")
            .authorizedGrantTypes("password", "refresh_token")
            .scopes("read", "write")
            .accessTokenValiditySeconds(600)
            .refreshTokenValiditySeconds(36000);
    }
 
    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints.authenticationManager(authenticationManager);
    }
}

资源服务器配置：

@Configuration
@EnableResourceServer
public class ResourceServerConfig extends ResourceServerConfigurerAdapter {
 
    @Override
    public void configure(HttpSecurity http) throws Exception {
        http
            .authorizeRequests()
            .anyRequest().authenticated();
    }
}

客户端请求访问令牌：

RestTemplate restTemplate = new RestTemplate();
 
String resource = "http://localhost:8080/oauth/token";
MultiValueMap<String, String> params = new LinkedMultiValueMap<>();
params.add("grant_type", "password");
params.add("username", "user");
params.add("password", "password");
params.add("client_id", "client");
params.add("client_secret", "secret");
 
HttpEntity<MultiValueMap<String, String>> request = new HttpEntity<>(params, new HttpHeaders());
 
ResponseEntity<String> response = restTemplate.postForEntity(resource, request, String.class);
String accessToken = JSONObject.parseObject(response.getBody()).getString("access_token");

客户端使用访问令牌访问受保护的资源：

RestTemplate res