修改过滤器返回，之前多做了一次转换。导致前端接收到的返回结果是字符串

src/main/java/cn/quantgroup/xyqb/filter/RequestFilter.java

@@ -54,7 +54,7 @@ public class RequestFilter implements Filter {
                 response.setStatus(401);
                 response.setHeader("Content-Type", "application/json;charset=utf-8");
                 PrintWriter writer = response.getWriter();
-                writer.print(JSONObject.toJSONString(UNAUTH_RESULT));
+                writer.print(UNAUTH_RESULT);
                 writer.close();
                 return;
             }