diff --git a/src/com/hellogithub/servlet/contributionValueSevlet.java b/src/com/hellogithub/servlet/contributionValueSevlet.java
index 3d424bc..063a688 100644
--- a/src/com/hellogithub/servlet/contributionValueSevlet.java
+++ b/src/com/hellogithub/servlet/contributionValueSevlet.java
@@ -1,8 +1,11 @@
 package com.hellogithub.servlet;
 
 import com.alibaba.fastjson.JSONObject;
+import com.hellogithub.dao.UserDao;
+import com.hellogithub.entity.articleEntity;
 import com.hellogithub.entity.userEntity;
 import com.hellogithub.service.UserService;
+import com.hellogithub.service.articleService;
 import jakarta.servlet.ServletException;
 import jakarta.servlet.annotation.WebServlet;
 import jakarta.servlet.http.HttpServlet;
@@ -12,11 +15,14 @@ import jakarta.servlet.http.HttpSession;
 
 import java.io.IOException;
 import java.io.PrintWriter;
+import java.util.HashMap;
+import java.util.List;
 
 @WebServlet("/contributionValue")
 public class contributionValueSevlet extends HttpServlet {
-    private UserService userService = new UserService();
+    protected UserService userService = new UserService();
     @Override
+
     protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
         doPost(req, resp);
     }
@@ -34,13 +40,27 @@ public class contributionValueSevlet extends HttpServlet {
         resp.setContentType("application/json;charset=UTF-8");
 
 
-
         PrintWriter writer = resp.getWriter();
         HttpSession session = req.getSession();
         userEntity user = (userEntity)session.getAttribute("user");
-        String userName = user.getUserName();
-        int Value = userService.contributionValueReturn(userName);
-        writer.println(Value);
+        if(user == null){
+            setResultError("用户暂未登录", writer);
+        }else{
+            String userName = user.getUserName();
+            int Value = userService.contributionValueReturn(userName);
+            writer.println(Value);
+        }
+            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);
+    }
 }
diff --git a/src/com/hellogithub/servlet/selectUserLabelServlet.java b/src/com/hellogithub/servlet/selectUserLabelServlet.java
index bea0339..f7b8b87 100644
--- a/src/com/hellogithub/servlet/selectUserLabelServlet.java
+++ b/src/com/hellogithub/servlet/selectUserLabelServlet.java
@@ -35,9 +35,13 @@ public class selectUserLabelServlet extends HttpServlet {
         PrintWriter writer = resp.getWriter();
         HttpSession session = req.getSession();
         userEntity userEntity=(userEntity)session.getAttribute("user");
-        String name = userEntity.getUserName();
-        String jsonString = JSONObject.toJSONString(userService.selectLabel(name));
-        writer.println(jsonString);
+        if(userEntity == null){
+            setResultError("用户暂未登录", writer);
+        }else{
+            String name = userEntity.getUserName();
+            String jsonString = JSONObject.toJSONString(userService.selectLabel(name));
+            writer.println(jsonString);
+        }
 //        setResultOK("success",writer);
         writer.close();