增加校验

src/main/java/cn/quantgroup/xyqb/controller/external/UserController.java

@@ -472,7 +472,7 @@ public class UserController implements IBaseController {
 
         String token = request.getHeader("x-auth-token");
 
-        if (null == token) {
+        if (null == token || "".equals(token)) {
             return JsonResult.buildErrorStateResult("token缺失", null);
         }
         userService.logout(token);