在BrowserSecurityConfig添加出错
@Autowired
private UserDetailsService userDetailsService;

添加了 @Qualifier(“myUserDetailsService”)一样出错是怎么一回事

2019-03-04 13:46:18.704 WARN 22101 — [ main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name ‘springSecurityFilterChain’ defined in class path resource [org/springframework/security/config/annotation/web/configuration/WebSecurityConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.servlet.Filter]: Factory method ‘springSecurityFilterChain’ threw exception; nested exception is java.lang.NullPointerException