springboot oauth2 示例

好的，您想了解 Spring Boot OAuth2 的示例。以下是一个基于 Spring Boot OAuth2 的简单示例：

1. 首先，在您的 pom.xml 文件中添加以下依赖项：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-oauth2-client</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>

2. 接下来，创建一个 Spring Security 配置类，其中包括 OAuth2 认证配置和资源服务器配置：

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .antMatchers("/").permitAll()
                .anyRequest().authenticated()
                .and().oauth2Login();
    }
}

3. 创建一个 OAuth2 配置类，将 OAuth2 服务端的相关信息配置进去：

@Configuration
public class OAuth2Config {

    @Bean
    public ClientRegistration clientRegistration() {
        return ClientRegistration.withRegistrationId("example")
                .clientId("example-client-id")
                .clientSecret("example-client-secret")
                .clientAuthenticationMethod(ClientAuthenticationMethod.BASIC)
                .authorizationGrantType(AuthorizationGrantType.AUTHORIZATION_CODE)
                .redirectUriTemplate("{baseUrl}/login/oauth2/code/{registrationId}")
                .scope("read:user")
                .authorizationUri("https://example.com/oauth2/authorize")
                .tokenUri("https://example.com/oauth2/token")
                .userInfoUri("https://example.com/userinfo")
                .userNameAttributeName(IdTokenClaimNames.SUB)
                .clientName("Example Client")
                .build();
    }

    @Bean
    public OAuth2AuthorizedClientService authorizedClientService(OAuth2ClientService clientService) {
        return new InMemoryOAuth2AuthorizedClientService(clientService);
    }

    @Bean
    public OAuth2ClientService clientService(ClientRegistrationRepository clientRegistrationRepository) {
        return new InMemoryOAuth2ClientService(clientRegistrationRepository);
    }

}

4. 最后，创建一个简单的基于 Spring MVC 的控制器类，用于处理请求：

@Controller
public class ExampleController {

    @GetMapping("/")
    public String index() {
        return "index";
    }

    @GetMapping("/user")
    public String getUser(Model model, OAuth2AuthenticationToken authentication) {
        OAuth2AuthorizedClient client = new OAuth2AuthorizedClient
                .Builder(authentication.getAuthorizedClientRegistrationId(), authentication.getName())
                .build();
        model.addAttribute("user", client.getPrincipalName());
        return "user";
    }
}

以上就是一个基于 Spring Boot OAuth2 的简单示例。您可以根据自己的需求进行配置和扩展。