change - 单点登录修改

ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/SysLoginController.java

@@ -85,6 +85,10 @@ public class SysLoginController extends BaseController
         //单点登录接口
         String requestURL = request.getParameter("iot_sessionid");
         System.out.println("获取sessionId："+requestURL);
+        if(StringUtils.isEmpty(requestURL)){
+            //return "redirect:"+loginSuccessRedirect;
+            return "login";
+        }
         try{
             if(StringUtils.isNotNull(requestURL)){
                 Map<String,Object> params = new HashMap<>();
@@ -131,6 +135,7 @@ public class SysLoginController extends BaseController
 
         }catch (Exception e) {
             System.out.println("登录异常："+e);
+            return "redirect:"+loginSuccessRedirect;
         }
         return "login";
     }