fix 修复 及其特殊场景下获取 StopWatch 为null问题

ruoyi-common/ruoyi-common-web/src/main/java/org/dromara/common/web/interceptor/PlusWebInvokeTimeInterceptor.java

@@ -2,6 +2,7 @@ package org.dromara.common.web.interceptor;
 
 import cn.hutool.core.io.IoUtil;
 import cn.hutool.core.map.MapUtil;
+import cn.hutool.core.util.ObjectUtil;
 import jakarta.servlet.http.HttpServletRequest;
 import jakarta.servlet.http.HttpServletResponse;
 import lombok.extern.slf4j.Slf4j;
@@ -64,10 +65,12 @@ public class PlusWebInvokeTimeInterceptor implements HandlerInterceptor {
     @Override
     public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
         StopWatch stopWatch = KEY_CACHE.get();
+        if (ObjectUtil.isNotNull(stopWatch)) {
             stopWatch.stop();
             log.info("[PLUS]结束请求 => URL[{}],耗时:[{}]毫秒", request.getMethod() + " " + request.getRequestURI(), stopWatch.getTime());
             KEY_CACHE.remove();
         }
+    }
 
     /**
      * 判断本次请求的数据类型是否为json