Java SpringBoot Rest OAuth2 Principal 为空

Question

我尝试了有关Java SpringBoot REST OAuth2 身份验证的不同教程。我尝试将它们与简单的 Web 表单身份验证结合起来，但我仍然无法获得 Principal 类对象。我null每次都在我的休息控制器上（显示在下面的行中），我错过了什么吗？授权服务器配置.javaimport org.springframework.beans.factory.annotation.Autowired;import org.springframework.context.annotation.Configuration;import org.springframework.security.authentication.AuthenticationManager;import org.springframework.security.oauth2.config.annotation.configurers.ClientDetailsServiceConfigurer;import org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerConfigurerAdapter;import org.springframework.security.oauth2.config.annotation.web.configuration.EnableAuthorizationServer;import org.springframework.security.oauth2.config.annotation.web.configurers.AuthorizationServerEndpointsConfigurer;import org.springframework.security.oauth2.provider.token.TokenStore;@Configuration@EnableAuthorizationServerpublic class AuthorizationServerConfiguration extends AuthorizationServerConfigurerAdapter {    private static final String REALM = "MY_OAUTH_REALM";    @Autowired    private TokenStore tokenStore;    @Autowired    private AuthenticationManager authenticationManager;    @Override    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {        clients.inMemory()                .withClient("my-trusted-client")                .authorizedGrantTypes("password", "authorization_code", "refresh_token", "implicit")                .scopes("read", "write", "trust")                .secret("secret")                .accessTokenValiditySeconds(120).//Access token is only valid for 2 minutes.                refreshTokenValiditySeconds(600);//Refresh token is only valid for 10 minutes.    }    @Override    public void configure(AuthorizationServerEndpointsConfigurer endpoints) {        endpoints.tokenStore(tokenStore).authenticationManager(authenticationManager);    }}