ClientDetailsService

public interface ClientDetails extends Serializable {

	String getClientId();//客户端id
	
	Set<String> getResourceIds();//此客户端可以访问的资源。如果为空，则调用者可以忽略
	
	boolean isSecretRequired();//验证此客户端是否需要secret
	
	String getClientSecret();//获取客户端的secret
	
	boolean isScoped();//此客户端是否仅限于特定范围
	
	Set<String> getScope();//此客户端的范围。如果客户端未确定作用域，则为空
	
	Set<String> getAuthorizedGrantTypes();//此客户端被授权的授权类型
	
	Set<String> getRegisteredRedirectUri();//此客户端的预定义重定向redirect_url
	
	Collection<GrantedAuthority> getAuthorities();//权限集合
	
	Integer getAccessTokenValiditySeconds();//访问令牌有效期
	
	Integer getRefreshTokenValiditySeconds();//刷新令牌有效期
	
	boolean isAutoApprove(String scope);//测试客户端是否需要特定范围的用户批准
	
	Map<String, Object> getAdditionalInformation();//额外的信息
}

public interface ClientDetailsService {

    //通过clientId获取客户端详情信息
    ClientDetails loadClientByClientId(String clientId) throws ClientRegistrationException;
}

客户端详情（Client Details）能够在应用程序运行的时候进行更新，可以通过访问底层的存储服务（例如将客户端详情存储在一个关系数据库的表中，就可以使用 JdbcClientDetailsService）或者通过 ClientDetailsManager 接口（同时你也可以实现 ClientDetailsService 接口）来进行管理

JDBC存储客户端信息

client_secret：客户端密码，此处不能是明文，需要加密

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
    <version>2.3.12.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework.security.oauth</groupId>
    <artifactId>spring-security-oauth2</artifactId>
    <version>2.3.4.RELEASE</version>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
    <version>2.3.12.RELEASE</version>
</dependency>

@Configuration
public class MyOauth2Config {

    /**
     * druid数据源
     */
    @Bean
    @ConfigurationProperties(prefix = "spring.datasource")
    public DataSource druidDataSource() {
        return new DruidDataSource();
    }

    /**
     * jdbc管理令牌
     */
    @Bean
    public TokenStore jdbcTokenStore() {
        return new JdbcTokenStore(druidDataSource());
    }

    /**
     * 授权码管理策略
     */
    @Bean
    public AuthorizationCodeServices jdbcAuthorizationCodeServices() {
        //使用jdbc方式保存授权码到oauth_code中
        return new JdbcAuthorizationCodeServices(druidDataSource());
    }

    /**
     * 使用jdbc方式管理客户端信息
     */
    @Bean
    public ClientDetailsService jdbcClientDetailsService(){
        return new JdbcClientDetailsService(druidDataSource());
    }

    @Bean
    public PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }
}

/**
 * 当前需要使用内存方式存储了用户令牌，应当使用UserDetailsService才行，否则会报错
 */
@Component
public class MyUserDetailService implements UserDetailsService {

    @Autowired
    private PasswordEncoder passwordEncoder;

    @Override
    public UserDetails loadUserByUsername(String s) throws UsernameNotFoundException {
        return new User("admin", passwordEncoder.encode("123456"),
                AuthorityUtils.commaSeparatedStringToAuthorityList("admin_role"));
    }
}

@EnableWebSecurity
public class OAuth2SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private MyUserDetailService myUserDetailService;

    /**
     * password密码模式要使用此认证管理器
     */
    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }

    /**
     * 用户类信息
     */
    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(myUserDetailService);
    }
}

@Configuration
@EnableAuthorizationServer
public class OAuth2AuthenticationServerConfig extends AuthorizationServerConfigurerAdapter {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Autowired
    private MyUserDetailsService myUserDetailsService;

    @Autowired
    private TokenStore tokenStore;
    
    @Autowired
    private AuthorizationCodeServices jdbcAuthorizationCodeServices;
    
    @Autowired
    private ClientDetailsService jdbcClientDetailsService;

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.withClientDetails(jdbcClientDetailsService);
    }

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints.authenticationManager(authenticationManager);
        endpoints.userDetailsService(myUserDetailsService);
        //令牌管理策略
        endpoints.tokenStore(tokenStore);
        //授权码管理策略，针对授权码模式有效，会将授权码放到oauth_code表，授权后就删除它
        endpoints.authorizationCodeServices(jdbcAuthorizationCodeServices);
    }
}