自定义AuthenticationFailureHandler @Bean与新的FailureHandler()

@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {

    @Bean
    public AuthenticationFailureHandler customAuthenticationFailureHandler() {
        return new CustomAuthenticationFailureHandler();
    }

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            .formLogin()
                .failureHandler(customAuthenticationFailureHandler())
                .and()
            // other configurations
    }
}

public class CustomAuthenticationFailureHandler implements AuthenticationFailureHandler {

    @Override
    public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException exception) throws IOException, ServletException {
        // custom authentication failure logic
    }
}

public class SomeClass {

    private AuthenticationFailureHandler failureHandler;

    public SomeClass() {
        this.failureHandler = new CustomAuthenticationFailureHandler();
    }

    public void someMethod() {
        // use the failureHandler
    }
}