Springboot前后端分离单点登录代码

以下是一个简单的Spring Boot前后端分离单点登录的示例代码，供参考：

1. 配置Spring Security

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService userDetailsService;

    @Autowired
    private PasswordEncoder passwordEncoder;

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .authorizeRequests()
                .antMatchers("/oauth/**", "/login/**", "/logout/**").permitAll()
                .anyRequest().authenticated()
                .and()
                .formLogin().loginPage("/login").permitAll()
                .and()
                .logout().logoutUrl("/logout").logoutSuccessUrl("/login").permitAll();
    }

    @Override
    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(userDetailsService).passwordEncoder(passwordEncoder);
    }
}

2. 配置OAuth2授权服务器

@Configuration
@EnableAuthorizationServer
public class AuthServerConfig extends AuthorizationServerConfigurerAdapter {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Autowired
    private DataSource dataSource;

    @Autowired
    private PasswordEncoder passwordEncoder;

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.jdbc(dataSource).passwordEncoder(passwordEncoder);
    }

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints.authenticationManager(authenticationManager)
                .tokenStore(tokenStore());
    }

    @Override
    public void configure(AuthorizationServerSecurityConfigurer security) throws Exception {
        security.tokenKeyAccess("permitAll()")
                .checkTokenAccess("isAuthenticated()");
    }

    @Bean
    public TokenStore tokenStore() {
        return new JdbcTokenStore(dataSource);
    }
}

3. 配置业务服务器的OAuth2客户端

@Configuration
@EnableOAuth2Sso
public class ClientConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .authorizeRequests()
                .antMatchers("/", "/login").permitAll()
                .anyRequest().authenticated();
    }

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/static/**");
    }

    @Bean
    public OAuth2RestTemplate oauth2RestTemplate(OAuth2ClientContext oauth2ClientContext,
                                                 OAuth2ProtectedResourceDetails details) {
        return new OAuth2RestTemplate(details, oauth2ClientContext);
    }
}

以上是一个简单的Spring Boot前后端分离单点登录的示例代码。具体实现可以参考Spring Security和Spring Security OAuth2的官方文档，以及相关的示例代码。