减少不必要的sql语句

src/main/java/service/Service.kt

@@ -467,15 +467,16 @@ class Service {
 
         val conn = DBUtil.getConnection()
         try {
-            val prep = conn.prepareStatement("update `menu` set permId=-1 where id=?")
+            val prep = conn.prepareStatement("update `menu` set permId=? where id=?")
-            prep.setInt(1,menuId)
+            prep.setInt(1,-1)
+            prep.setInt(2,-menuId)
             prep.execute()
+            prep.close()
 
-            val prep2 = conn.prepareStatement("update `menu` set permId=? where id=?")
+            prep.setInt(1,permId)
-            prep2.setInt(1,permId)
+            prep.setInt(2,menuId)
-            prep2.setInt(2,menuId)
 
-            val bool = prep2.executeUpdate()
+            val bool = prep.executeUpdate()
             return bool == 1
         }finally {
             conn.close()