diff --git a/src/com/hellogithub/dao/projectDao.java b/src/com/hellogithub/dao/projectDao.java
index d5c3380..8b57b38 100644
--- a/src/com/hellogithub/dao/projectDao.java
+++ b/src/com/hellogithub/dao/projectDao.java
@@ -236,4 +236,33 @@ public class projectDao {
         }
         return projectEntityList;
     }
+    public int addStarNum(int proId)
+    {
+        int num ;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql = "update project set starNum = starNum + 1 where isValid = 1 and projectId= ?";
+            num  = runner.update(conn, sql,proId);
+            conn.close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return num;
+    }
+
+    public int cancelStarNum(int proId)
+    {
+        int num ;
+        try {
+            Connection conn = JdbcUtils.getConnection();
+            QueryRunner runner = new QueryRunner();
+            String sql = "update project set starNum = starNum - 1 where isValid = 1 and projectId= ?";
+            num  = runner.update(conn, sql,proId);
+            conn.close();
+        } catch (SQLException e) {
+            throw new RuntimeException(e);
+        }
+        return num;
+    }
 }
diff --git a/src/com/hellogithub/service/supportService.java b/src/com/hellogithub/service/supportService.java
index 40b8f9d..d4d887b 100644
--- a/src/com/hellogithub/service/supportService.java
+++ b/src/com/hellogithub/service/supportService.java
@@ -1,12 +1,14 @@
 package com.hellogithub.service;
 
 import com.hellogithub.dao.UserDao;
+import com.hellogithub.dao.projectDao;
 import com.hellogithub.dao.supportDao;
 import com.hellogithub.entity.supportEntity;
 
 public class supportService {
     private supportDao supportDao = new supportDao();
     private UserDao userDao = new UserDao();
+    private projectDao projectDao = new projectDao();
     public int retNum(String username,int projectId){
         int num ;
         supportEntity supportEntity = supportDao.selectSupport(userDao.selectIdByName(username),projectId);
@@ -24,7 +26,8 @@ public class supportService {
     {
         String tip;
         int num = supportDao.insertSupport(userDao.selectIdByName(username),projectId);
-        if(num == 1)
+        int numm = projectDao.addStarNum(projectId);
+        if(num == 1 & numm == 1)
         {
             tip="点赞成功";
         }
@@ -38,7 +41,8 @@ public class supportService {
     {
         String tip;
         int num = supportDao.deleteSupport(userDao.selectIdByName(username),projectId);
-        if(num == 1)
+        int numm = projectDao.cancelStarNum(projectId);
+        if(num == 1 & numm == 1)
         {
             tip="取消成功";
         }