实现国标录像级联播放，优化点播流程，加快点播速度

648540858

2022-02-27 e94b99d11c46246532edc93cd25cbf8c0b88f03f

 src/main/java/com/genersoft/iot/vmp/conf/security/SecurityUtils.java

@@ -48,7 +48,7 @@
        Authentication authentication = getAuthentication();
        if(authentication!=null){
            Object principal = authentication.getPrincipal();
            if(principal!=null){
            if(principal!=null && !"anonymousUser".equals(principal)){
                LoginUser user = (LoginUser) authentication.getPrincipal();
                return user;
            }