diff --git a/src/com/hellogithub/servlet/githubinfo/ret_Github_infoServlet.java b/src/com/hellogithub/servlet/githubinfo/ret_Github_infoServlet.java
index 01a333d..768873c 100644
--- a/src/com/hellogithub/servlet/githubinfo/ret_Github_infoServlet.java
+++ b/src/com/hellogithub/servlet/githubinfo/ret_Github_infoServlet.java
@@ -35,7 +35,28 @@ public class ret_Github_infoServlet extends HttpServlet {
 
         PrintWriter writer = resp.getWriter();
         String projectid = req.getParameter("projectId");
-        writer.println(githubservice.ret_Github_info(Integer.parseInt(projectid)));
+        String json  = githubservice.ret_Github_info(Integer.parseInt(projectid));
+        if(json == null){
+            setResultError("该信息未收录", writer);
+        }else{
+            writer.println(json);
+        }
         writer.close();
     }
+    public void setResult(Integer code, String msg, PrintWriter writer) {
+        HashMap<String, Object> result = new HashMap<>();
+        result.put("code", code);
+        result.put("msg", msg);
+        String jsonString = JSONObject.toJSONString(result);
+        writer.println(jsonString);
+        writer.close();
+    }
+
+    public void setResultError(String msg, PrintWriter writer) {
+        setResult(500, msg, writer);
+    }
+
+    public void setResultOK(String msg, PrintWriter writer) {
+        setResult(200, msg, writer);
+    }
 }