Spring Boot2.0 Oauth2 服务器和客户端配置及理

在Spring Boot 2.0中，OAuth2的配置和理解可以简化为以下几个步骤：

1. 引入依赖：确保你的pom.xml或build.gradle文件中包含了Spring Security和Spring Security OAuth2的依赖。

<!-- For Maven -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-security</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.security.oauth</groupId>
    <artifactId>spring-security-oauth2-autoconfigure</artifactId>
</dependency>

2. 配置OAuth2服务器：在你的application.properties或application.yml文件中配置OAuth2服务器的基本信息，例如客户端详情、授权模式、token存储等。

# application.yml配置示例
 
spring:
  security:
    oauth2:
      client:
        registration:
          my-client:
            client-id: client-id
            client-secret: client-secret
            authorization-grant-type: authorization_code
            redirect-uri: "{baseUrl}/login/oauth2/code/{registrationId}"
            scope: openid, profile, email
        provider:
          my-client:
            authorization-uri: https://your-auth-server/auth
            token-uri: https://your-auth-server/token
            user-info-uri: https://your-auth-server/userinfo
            user-name-attribute: sub

3. 配置OAuth2客户端：如果你需要作为OAuth2客户端访问受保护的资源，你需要配置客户端信息，并确保有适当的授权头在API调用中。

@Configuration
@EnableOAuth2Client
public class OAuth2ClientConfig {
 
    @Bean
    public OAuth2AuthorizedClientManager authorizedClientManager(
            ClientRegistrationRepository clientRegistrationRepository,
            OAuth2AuthorizedClientRepository authorizedClientRepository) {
        DefaultOAuth2AuthorizedClientManager manager = new DefaultOAuth2AuthorizedClientManager(
                clientRegistrationRepository, authorizedClientRepository);
        return manager;
    }
}

4. 使用OAuth2客户端：在你的服务中，你可以使用OAuth2AuthorizedClientManager获取授权客户端来调用受保护的资源。

@RestController
public class MyController {
 
    @Autowired
    private OAuth2AuthorizedClientManager authorizedClientManager;
 
    @GetMapping("/api/resource")
    public String getResource(OAuth2AuthenticationToken token) {
        OA