Spring 为什么配置类自身会形成循环依赖关系?
我不明白这个类的本质是什么,它自身产生了一个周期性的依赖注入。 我尝试过添加@Lazy注释或从构造函数中删除@Autowired,但都没有用。可能房间里有一头大象我没看见 这是控制台显示的内容:Spring 为什么配置类自身会形成循环依赖关系?,spring,spring-boot,configuration,javabeans,Spring,Spring Boot,Configuration,Javabeans,我不明白这个类的本质是什么,它自身产生了一个周期性的依赖注入。 我尝试过添加@Lazy注释或从构造函数中删除@Autowired,但都没有用。可能房间里有一头大象我没看见 这是控制台显示的内容: *************************** APPLICATION FAILED TO START *************************** Description: The dependencies of some of the beans in the applicat
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APPLICATION FAILED TO START
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Description:
The dependencies of some of the beans in the application context form a cycle:
┌─────┐
| securityConfiguration defined in file [E:\Users\Adelin\eclipse-workspace2\AuthenticationSpringJWTAngular\target\classes\src\main\configuration\SecurityConfiguration.class]
这是配置类:
package src.main.configuration;
import static org.springframework.security.config.http.SessionCreationPolicy.STATELESS;
import static src.main.constant.SecurityConstant.PUBLIC_URLS;
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.crypto.bcrypt.BCryptPasswordEncoder;
import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
import src.main.filter.JWTAccessDeniedHandler;
import src.main.filter.JWTAuthenticationEntryPoint;
import src.main.filter.JWTAuthorizationFilter;
import src.main.service.IUserDetailsService;
@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true)
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
private JWTAuthorizationFilter jwtAuthorizationFilter;
private JWTAccessDeniedHandler jwtAccessDeniedHandler;
private JWTAuthenticationEntryPoint jwtAuthenticationEntryPoint;
private IUserDetailsService userDetailsService;
private BCryptPasswordEncoder bCryptPasswordEncoder;
@Autowired
public SecurityConfiguration(JWTAuthorizationFilter jwtAuthorizationFilter,
JWTAccessDeniedHandler jwtAccessDeniedHandler, JWTAuthenticationEntryPoint jwtAuthenticationEntryPoint,
IUserDetailsService userDetailsService, BCryptPasswordEncoder bCryptPasswordEncoder) {
this.jwtAuthorizationFilter = jwtAuthorizationFilter;
this.jwtAccessDeniedHandler = jwtAccessDeniedHandler;
this.jwtAuthenticationEntryPoint = jwtAuthenticationEntryPoint;
this.userDetailsService = userDetailsService;
this.bCryptPasswordEncoder = bCryptPasswordEncoder;
}
@Override
protected void configure(AuthenticationManagerBuilder amb) throws Exception {
amb.userDetailsService(userDetailsService).passwordEncoder(bCryptPasswordEncoder);
}
@Override
protected void configure(HttpSecurity http) throws Exception {
http.csrf().disable()//
.cors().and() //
// we're not using sessions, not keeping track of currently logging in users
// users prove by using a token -> stateless
.sessionManagement().sessionCreationPolicy(STATELESS).and() //
.authorizeRequests().antMatchers(PUBLIC_URLS).permitAll() // no authentication
// needed
.anyRequest().authenticated().and() // anything else - reqs. authentication
.exceptionHandling().accessDeniedHandler(jwtAccessDeniedHandler)
.authenticationEntryPoint(jwtAuthenticationEntryPoint).and()
.addFilterBefore(jwtAuthorizationFilter, UsernamePasswordAuthenticationFilter.class);
}
@Bean
@Override
public AuthenticationManager authenticationManager() throws Exception {
return super.authenticationManager();
}
@Bean
public BCryptPasswordEncoder bCryptPasswordEncoder() {
return new BCryptPasswordEncoder();
}
}
我怀疑是因为这个
SecurityConfiguration
的构造函数被标记为@Autowired
,带有类型为BCryptPasswordEncoder
的参数,因此基本上为了实例化SecurityConfiguration
它需要类型为BCryptPasswordEncoder
的bean
但是同样,同一个类有一个实例方法,它正在创建类型为BCryptPasswordEncoder
的bean
因此,基本上,无法调用构造函数,因为它依赖于方法返回的值,而无法调用方法,因为尚未调用构造函数来实例化它
如果您将方法更改为下面的方法(我不是建议将其作为解决方案,只是为了验证我的理解),那么它可能会起作用
@Bean
public static BCryptPasswordEncoder bCryptPasswordEncoder() {
return new BCryptPasswordEncoder();
}
为什么需要在配置类中将
BCryptPasswordEncoder
作为字段接收?您可以只执行amb.userDetailsService(userDetailsService).passwordEncoder(this.bCryptPasswordEncoder())
(调用方法bCryptPasswordEncoder()
,而不是传递字段)-当然,还要从类中删除字段bCryptPasswordEncoder