在没有LoadTimeWeaving的情况下使用服务自定义UserDetails

import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;

public class CustomUserDetailsService implements UserDetailsService {

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 在这里根据用户名查询数据库或其他数据源，获取用户信息
        // 并将用户信息封装成一个实现了UserDetails接口的对象

        // 示例代码，实际情况需要根据业务逻辑进行修改
        if ("admin".equals(username)) {
            // 假设从数据库中查询到的密码是加密后的密码
            String password = "$2a$10$3vRc1GQXoZf1Q3Zq5z9U2eZ6r7J0X0a3iX6jJ0bXQ8Qz0zJW3g1a2";
            // 假设该用户具有ROLE_ADMIN角色
            List<GrantedAuthority> authorities = AuthorityUtils.createAuthorityList("ROLE_ADMIN");

            return new User(username, password, authorities);
        } else {
            throw new UsernameNotFoundException("User not found with username: " + username);
        }
    }
}

@Configuration
@EnableWebSecurity
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private UserDetailsService userDetailsService;

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

    // 其他配置...
}