修改retUser接口

2023-07-11 13:58:26 +08:00
parent 1080d61399
commit 4ead89764a
1 changed files with 4 additions and 0 deletions
--- a/src/com/hellogithub/servlet/retUserServlet.java
+++ b/src/com/hellogithub/servlet/retUserServlet.java
@@ -42,6 +42,10 @@ public class retUserServlet extends HttpServlet {

        PrintWriter writer = resp.getWriter();
        String username = req.getParameter("username");
+        if(username ==null)
+        {
+            return ;
+        }
        String jsonString="";
        jsonString = JSONObject.toJSONString(userService.selectUserByName(username));
        if(jsonString.equals(""))