at cn.tearn.security.service.impl.UserDetailServiceImpl.loadUserByUsername(UserDetailServiceImpl.java:20)
at org.springframework.security.authentication.dao.DaoAuthenticationProvider.retrieveUser(DaoAuthenticationProvider.java:104)
at org.springframework.security.authentication.dao.AbstractUserDetailsAuthenticationProvider.authenticate(AbstractUserDetailsAuthenticationProvider.java:144)
at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:174)
at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:199)
at org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter$AuthenticationManagerDelegator.authenticate(WebSecurityConfigurerAdapter.java:502)
at cn.tearn.security.filter.CustomUsernamePasswordAuthenticationFilter.attemptAuthentication(CustomUsernamePasswordAuthenticationFilter.java:37)
（CustomUsernamePasswordAuthenticationFilter重写了UsernamePasswordAuthenticationFilter）
at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212)
at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
