Java 用于身份验证管理器的自动连线

我想为Oauth2实现一个授权和一个资源服务器，它是我的参考站点，但是私有AuthenticationManager AuthenticationManager在intellij上给了我一个错误，比如“无法自动连线”，那么我如何修复它呢

import 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;

@Configuration
@EnableAuthorizationServer
public class AuthorizationServer extends AuthorizationServerConfigurerAdapter {

    @Autowired
    private AuthenticationManager authenticationManager;

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

    @Override
    public void configure(ClientDetailsServiceConfigurer clients) throws Exception {
        clients.inMemory().withClient("javainuse-client").secret("javainuse-secret")
                .authorizedGrantTypes("client_credentials").scopes("resource-server-read", "resource-server-write");
    }
}

---

如果您必须使用AuthenticationManager（这并不总是正确的，这取决于您如何管理用户），则需要将其公开为bean。像这样：

@Configuration
public static class AuthenticationMananagerProvider extends WebSecurityConfigurerAdapter {

    @Bean
    @Override
    public AuthenticationManager authenticationManagerBean() throws Exception {
        return super.authenticationManagerBean();
    }
}

资料来源（这是一本有趣的读物，提供了许多见解）：