Spring Boot：创建名为“springSecurityFilterChain”的 bean 时出错

Question

This is the error:

When I use spring security in Spring Boot, I get an error. I've searched google, and read the Spring documentation, but I am still having trouble. I do not understand what this error means.

Answer 1

I would guess, that your instance of UserDetailsServiceImpl is null , based on what I see in your screenshot.

To really help you, please add the stacktrace. Not as a screenshot but textual.

Answer 2

public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

UserDetailsServicelmpl userDetailsService;


AuthEntryPointjwt unauthorizedHandler;

@Bean
public AuthTokenFilter authenticationJwtTokenFilter() {
    return new AuthTokenFilter();
}

@Override
public void configure(AuthenticationManagerBuilder authenticationManagerBuilder) throws Exception {
    authenticationManagerBuilder.userDetailsService(userDetailsService).passwordEncoder(passwordEncoder());
}

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

@Bean
public PasswordEncoder passwordEncoder() {
    return new BCryptPasswordEncoder();
}

@Override
protected void configure(HttpSecurity http) throws Exception {
    http.cors().and().csrf().disable()
            .exceptionHandling().authenticationEntryPoint(unauthorizedHandler).and()
            .sessionManagement().sessionCreationPolicy(SessionCreationPolicy.STATELESS).and()
            .authorizeRequests().antMatchers("/api/auth/**").permitAll()
            .antMatchers("/api/test/**").permitAll()
            .anyRequest().authenticated();

    http.addFilterBefore(authenticationJwtTokenFilter(), UsernamePasswordAuthenticationFilter.class);
}

@Autowired UserRepository userRepository;

@Transactional
@Override
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
    User user = userRepository.findByUsername(username)
            .orElseThrow(()->new UsernameNotFoundException("User not found with username"+ username));
    return  UserDetailslmpl.build(user);
}