OAuthSecurityConfig.java

@Configuration
public class OAuthSecurityConfig extends AuthorizationServerConfigurerAdapter {

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.inMemory()
                .withClient("client")
                .secret("secret")
                .redirectUris("http://www.baidu.com")
                .authorizedGrantTypes("authorization_code")
                .scopes("app");
    }
}

DemoApplication.java

@SpringBootApplication
@EnableAuthorizationServer
public class DemoApplication {
	public static void main(String[] args) {
		SpringApplication.run(DemoApplication.class, args);
	}
}

build.gradle

dependencies {
	compile('org.springframework.boot:spring-boot-starter')

	compile('com.auth0:java-jwt:2.2.0')
	compile('org.springframework.cloud:spring-cloud-starter-security')
	compile('org.springframework.cloud:spring-cloud-starter-oauth2')
	compile('org.springframework.boot:spring-boot-starter-web')
	compile('org.springframework.boot:spring-boot-starter-jersey')

	testCompile('org.springframework.boot:spring-boot-starter-test')
}

之后启动项目访问：localhost:8080/oauth/authorize?client_id=client&response_type=code&redirect_uri=http://www.baidu.com
验证身份，用户名：user，密码：启动的日志中找到Using default security password，之后点授权
获得code码，在url中：https://www.baidu.com/?code=K52t0C