尝试修正del接口操作失败，替换excuteUpdate为update

src/main/java/service/Service.kt

@@ -298,8 +298,11 @@ class Service {
     fun deletePerm(permId: Int): Boolean {
         val conn = DBUtil.getConnection()
         try {
-            return conn.createStatement()
+            conn.createStatement()
-                    .execute("delete from `perm` where id=$permId") > 1
+                    .execute("delete from `perm` where id=$permId")
+            return true
+        } catch (e: Exception) {
+            return false
         } finally {
             conn.close()
         }