diff --git a/GoMybatisEngine_test.go b/GoMybatisEngine_test.go
index 92a511a..539cc73 100644
--- a/GoMybatisEngine_test.go
+++ b/GoMybatisEngine_test.go
@@ -206,10 +206,10 @@ func InitMapperByLocalSession() ExampleActivityMapperImpl {
 	var engine = GoMybatisEngine{}.New()
 	//mysql链接格式为         用户名:密码@(数据库链接地址:端口)/数据库名称   例如root:123456@(***.mysql.rds.aliyuncs.com:3306)/test
 	db, err := engine.Open("mysql", "") //此处请按格式填写你的mysql链接，这里用*号代替
-	db.SetMaxOpenConns(200)             //连接池最大打开数
 	if err != nil {
 		panic(err.Error())
 	}
+	db.SetMaxOpenConns(200) //连接池最大打开数
 
 	var bytes = []byte(`<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"