为什么 GlobalAuthenticationConfigurerAdapter.init() 不可见?

Why is GlobalAuthenticationConfigurerAdapter.init() invisible?

我正在尝试使用 GlobalAuthenticationConfigurerAdapter 将自定义 UserDetailsService 连接到 AuthserverApplication.java root class of this sample Spring Boot OAuth2 sample app

Spring OAuth2 Developer Guide says to use a GobalAuthenticationConfigurerAdapter to hook up the UserDetailsService. And I modified code from the example in this blog post

但是,当我尝试使用 mvn spring-boot:run 启动修改后的 authserver 应用程序时,报告了以下根错误:

nested exception is java.lang.NoSuchMethodException:  
demo.AuthserverApplication$WebSecurityConfiguration$$EnhancerBySpringCGLIB$683c11.<init>()  

来自 mvn spring-boot:run 的完整日志,包括错误消息 can be read at a file sharing site by clicking on this link 的完整堆栈跟踪。

我接着看了the documentation for GlobalAuthenticationConfigurerAdapter,确认有init()方法

需要对下面的代码(或 the GitHub sample app 中的其他代码)进行哪些具体更改才能解决此错误并成功连接自定义 UserDetailsService示例 GitHub app?


在您的机器上重现问题:


您可以在几分钟内通过重新创建我的步骤在任何机器上重现此问题:

1.) 通过键入以下内容将 Spring Oauth2 示例应用程序下载到您的计算机上:

git clone https://github.com/spring-guides/tut-spring-security-and-angular-js/  

2.) 导航到 tut-spring-security-and-angular-js/tree/master/oauth2/authserver。这是正在崩溃的应用程序。当您键入 mvn spring-boot:run 而不做任何更改时,它应该会正确启动。但随后进行以下更改以重新创建问题:

3.) 将以下内容添加到 AuthserverApplication.java 以连接自定义 UserDetailsService

@Configuration
class WebSecurityConfiguration extends GlobalAuthenticationConfigurerAdapter {

    @Autowired
    Users users;

    @Override
    public void init(AuthenticationManagerBuilder auth) throws Exception {
        auth.userDetailsService(users);
    }

}

4.) 将下面的Users.javaclass添加到the demo package of the authserver app,使得3上面的GlobalAuthenticationConfigurerAdapter点真正的习惯 UserDetailsService。请注意,我取消了 JDBC 的钩子,以便此代码示例中没有数据库依赖项:

package demo;

import java.util.List;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.AuthorityUtils;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.provisioning.UserDetailsManager;
import org.springframework.stereotype.Service;

@Service
class Users implements UserDetailsManager {

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        String password;
        List<GrantedAuthority> auth = AuthorityUtils.commaSeparatedStringToAuthorityList("ROLE_USER");
        if (username.equals("Samwise")) {
            auth = AuthorityUtils.commaSeparatedStringToAuthorityList("ROLE_HOBBIT");
            password = "TheShire";
        }
        else if (username.equals("Frodo")){
            auth = AuthorityUtils.commaSeparatedStringToAuthorityList("ROLE_HOBBIT");
            password = "MyRing";
        }
        else{throw new UsernameNotFoundException("Username was not found. ");}
        return new org.springframework.security.core.userdetails.User(username, password, auth);
    }

    @Override
    public void createUser(UserDetails user) {// TODO Auto-generated method stub
    }

    @Override
    public void updateUser(UserDetails user) {// TODO Auto-generated method stub
    }

    @Override
    public void deleteUser(String username) {// TODO Auto-generated method stub
    }

    @Override
    public void changePassword(String oldPassword, String newPassword) {
        // TODO Auto-generated method stub
    }

    @Override
    public boolean userExists(String username) {
        // TODO Auto-generated method stub
        return false;
    }
}

修改后的完整代码AuthserverApplication.java,包括新的GlobalAuthenticationConfigurerAdapter can be found at a file sharing site by clicking on this link.

5.) 键入 mvn spring-boot:run 以尝试启动 authserver 应用程序。这将触发上述 nested exception is java.lang.NoSuchMethodException: demo.AuthserverApplication$WebSecurityConfiguration$$EnhancerBySpringCGLIB$683c11.<init>() 错误。

第一个错误只是因为您的 WebSecurityConfiguration 不可见。您可以添加 protected static 关键字来解决这个问题。