Java-应用程序上下文中某些bean的依赖关系形成一个循环：

Question

我试图创建一个jwt与Spring安全，但当我启动程序，我采取这个错误从Spring：

The dependencies of some of the beans in the application context form a cycle:

   authController (field private org.springframework.security.authentication.AuthenticationManager Spring.JWTDEMO.Api.AuthController.manager)
┌─────┐
|  webSecurityConfig (field private Spring.JWTDEMO.auth.UserDetailsService Spring.JWTDEMO.WebSecurityConfig.userService) 
↑     ↓
|  userDetailsService (field private org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder Spring.JWTDEMO.auth.UserDetailsService.passwordEncoder)
└─────┘


Action:

Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.

İt也是一个spring web程序，因此该程序与控制器一起工作。此控制器用于创建带有登录名的jwt。以下是我的authController类：

import Spring.JWTDEMO.auth.TokenManager;
import Spring.JWTDEMO.requests.LoginRequest;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.ResponseEntity;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping("/login")
public class AuthController {
    @Autowired
    private TokenManager tokenManager;
    @Autowired
    private AuthenticationManager manager;

    @PostMapping
    public ResponseEntity<String> login(@RequestBody LoginRequest loginRequest){

        try {
       manager.authenticate(new UsernamePasswordAuthenticationToken(loginRequest.getUsername(),loginRequest.getPassword()));
       return ResponseEntity.ok(tokenManager.tokenGenerator(loginRequest.getUsername()));
        }catch (Exception e){
            throw e;
        }

    }
}

这里是WebServiceConfig类：

import Spring.JWTDEMO.auth.TokenFilter;
import Spring.JWTDEMO.auth.UserDetailsService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.authentication.AuthenticationManager;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.config.http.SessionCreationPolicy;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;

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

    @Autowired
    private TokenFilter tokenFilter;
    @Autowired
    private UserDetailsService userService; 

   
    @Autowired  
    public void configurePasswordEncoder(AuthenticationManagerBuilder builder) throws Exception {
        builder.userDetailsService(userService).passwordEncoder(getBCryptPasswordEncoder());
      
    }

    @Bean
    public BCryptPasswordEncoder getBCryptPasswordEncoder(){
        return new BCryptPasswordEncoder();
    }

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

   
    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
                .authorizeRequests().antMatchers("/login").permitAll()
                .anyRequest().authenticated()
                .and().sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS);
        http.addFilterBefore(tokenFilter, UsernamePasswordAuthenticationFilter.class);
    }
}

以下是UserDetailsService：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.core.userdetails.User;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.stereotype.Service;

import javax.annotation.PostConstruct;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Map;


@Service
public class UserDetailsService  implements org.springframework.security.core.userdetails.UserDetailsService {

    private Map<String ,String> users= new HashMap();

    @Autowired
    private BCryptPasswordEncoder passwordEncoder;

    @PostConstruct
    public void init(){
        users.put("Asd",passwordEncoder.encode("123"));
    }

   
    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
       if(users.containsKey(username)){
           return new User(username,users.get(username),new ArrayList<>());
       }
       throw new UsernameNotFoundException(username);
    }
}

谢谢你的帮助阿莱尔迪

Answer 1

-

1. 简单而推荐的：

将这一行添加到应用程序中。属性

spring.main.allow-circular-references=true

**如果你刚刚读了你的控制台信息，你就可以得到问题的解决方案，下次尝试第一次读你的控制台，因为90%的解决方案都在那里：）**祝你好运