账套信息,代码优化!

component/shiro/src/main/java/com/cwhelp/component/shiro/ShiroUtil.java

@@ -61,6 +61,9 @@ public class ShiroUtil {
      */
     public static User getSubject(){
         Long userId = (Long) SecurityUtils.getSubject().getPrincipal();
+        if (userId == null) {
+            return null;
+        }
         return userService.getById(userId);
     }