OAuth2-授权码模式 登录流程

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
    @Bean
    PasswordEncoder passwordEncoder() {
        return new BCryptPasswordEncoder();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication()
                .withUser("test1")
                .password(new BCryptPasswordEncoder().encode("123456"))
                .roles("admin")
                .and()
                .withUser("test2")
                .password(new BCryptPasswordEncoder().encode("123456"))
                .roles("user");
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable().formLogin();
    }
}

@Configuration
public class AccessTokenConfig {
　　//生成的 Token 要往哪里存储  可以存在 Redis 中，也可以存在内存中，也可以结合 JWT 等等
    @Bean
    TokenStore tokenStore() {
        return new InMemoryTokenStore();       //它存在内存中
    }
}
// 这个类继承AuthorizationServerConfigureAdapter 对授权服务器的详细配置
@EnableAuthorizationServer    //表示开启授权服务器的自动化配置。
@Configuration
public class AuthorizationServer extends AuthorizationServerConfigurerAdapter {
    @Autowired
    TokenStore tokenStore;
    @Autowired
    ClientDetailsService clientDetailsService;
　　
　　//主要用来配置 Token 的一些基本信息
    @Bean
    AuthorizationServerTokenServices tokenServices() {
        DefaultTokenServices services = new DefaultTokenServices();
        services.setClientDetailsService(clientDetailsService);
        services.setSupportRefreshToken(true);   //是否支持刷新
        services.setTokenStore(tokenStore);      //token 存储的位置
        services.setAccessTokenValiditySeconds(60 * 60 * 2);   //token的有效期
        services.setRefreshTokenValiditySeconds(60 * 60 * 24 * 3);   // 刷新token的有效期
        return services;
    }

　　//用来配置令牌端点的安全约束,也就是这个端点谁能访问，谁不能访问
    @Override
    public void configure(AuthorizationServerSecurityConfigurer security) throws Exception {
        security.checkTokenAccess("permitAll()")     //checkTokenAccess 是指一个 Token 校验的端点
                .allowFormAuthenticationForClients();   //设置为可以直接访问  当资源服务器收到 Token 之后，需要去校验Token 的合法性，就会访问这个端点
    }

　　//配置客户端的详细信息
    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.inMemory()    //存储到内存中
                .withClient("test")   //客户端的id
                .secret(new BCryptPasswordEncoder().encode("123"))
                .resourceIds("rid")    //资源id
                .authorizedGrantTypes("authorization_code","refresh_token")   //授权类型
                .scopes("all")    //资源范围
                .redirectUris("http://localhost:8082/index.html");     //重定向url
    }

　　//配置令牌的访问端点和令牌服务
    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints.authorizationCodeServices(authorizationCodeServices())    //authorizationCodeService用来配置授权码的存储 这里我们是存在在内存中
                .tokenServices(tokenServices());  //配置令牌的存储 即 access_token 的存储位置
    }
    @Bean
    AuthorizationCodeServices authorizationCodeServices() {
        return new InMemoryAuthorizationCodeServices();
    }
}

@Configuration
@EnableResourceServer
public class ResourceServerConfig extends ResourceServerConfigurerAdapter {

　　//配置了一个 RemoteTokenServices 的实例  这是因为资源服务器和授权服务器是分开的，如果放一起就不需要配置 RemoteTokeService
    @Bean
    RemoteTokenServices tokenServices() {
        RemoteTokenServices services = new RemoteTokenServices();
        services.setCheckTokenEndpointUrl("http://localhost:8080/oauth/check_token");  //access_token 的校验地址
        services.setClientId("test");   //client_id
        services.setClientSecret("123");   //client_secret 
        return services;
    }

　　//资源拦截规则
    @Override
    public void configure(ResourceServerSecurityConfigurer resources) throws Exception {
        resources.resourceId("res1").tokenServices(tokenServices());
    }

　　　//请求规则
    @Override
    public void configure(HttpSecurity http) throws Exception {
        http.authorizeRequests()
                .antMatchers("/admin/**").hasRole("admin")
                .anyRequest().authenticated();
    }
}

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String hello() {
        return "hello";
    }
    @GetMapping("/admin/hello")
    public String admin() {
        return "admin";
    }
}

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8">
    <title>Oauth2</title>
</head>
<body>
你好，test！

<a href="http://localhost:8080/oauth/authorize?client_id=test&response_type=code&scope=all&redirect_uri=http://localhost:8082/index.html">第三方登录</a>

<h1 th:text="${msg}"></h1>
</body>
</html>

@Controller
public class HelloController {
    @Autowired
    RestTemplate restTemplate;

    @GetMapping("/index.html")
    public String hello(String code, Model model) {
        if (code != null) {
            MultiValueMap<String, String> map = new LinkedMultiValueMap<>();
            map.add("code", code);
            map.add("client_id", "test");
            map.add("client_secret", "123");
            map.add("redirect_uri", "http://localhost:8082/index.html");
            map.add("grant_type", "authorization_code");
            Map<String,String> resp = restTemplate.postForObject("http://localhost:8080/oauth/token", map, Map.class);
            String access_token = resp.get("access_token");
            System.out.println(access_token);
            HttpHeaders headers = new HttpHeaders();
            headers.add("Authorization", "Bearer " + access_token);
            HttpEntity<Object> httpEntity = new HttpEntity<>(headers);
            ResponseEntity<String> entity = restTemplate.exchange("http://localhost:8081/admin/hello", HttpMethod.GET, httpEntity, String.class);
            model.addAttribute("msg", entity.getBody());
        }
        return "index";
    }
}

{
    "access_token": "e7f223c4-7543-43c0-b5a6-5011743b5af4",      //请求数据所需要的令牌
    "token_type": "bearer",
    "refresh_token": "aafc167b-a112-456e-bbd8-58cb56d915dd",     //刷新token所需要的令牌
    "expires_in": 7199,                                          //token有效期还剩多久
    "scope": "all"
}