Mybatis 打开连接池和关闭连接池性能对比

1  创建数据库表

-- phpMyAdmin SQL Dump
-- version 4.2.11
-- http://www.phpmyadmin.net
--
-- Host: localhost
-- Generation Time: 2016-08-02 18:13:50
-- 服务器版本： 5.6.21
-- PHP Version: 5.6.3

SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
SET time_zone = "+00:00";

/*!40101 SET @[email protected]@CHARACTER_SET_CLIENT */;
/*!40101 SET @[email protected]@CHARACTER_SET_RESULTS */;
/*!40101 SET @[email protected]@COLLATION_CONNECTION */;
/*!40101 SET NAMES utf8 */;

--
-- Database: `mybatis`
--

-- --------------------------------------------------------

--
-- 表的结构 `Student`
--

CREATE TABLE IF NOT EXISTS `Student` (
`id` int(10) NOT NULL,
  `name` varchar(256) NOT NULL,
  `age` int(4) NOT NULL
) ENGINE=MyISAM AUTO_INCREMENT=2 DEFAULT CHARSET=latin1;

--
-- 转存表中的数据 `Student`
--

INSERT INTO `Student` (`id`, `name`, `age`) VALUES
(1, ‘zhansan‘, 20);

--
-- Indexes for dumped tables
--

--
-- Indexes for table `Student`
--
ALTER TABLE `Student`
 ADD PRIMARY KEY (`id`);

--
-- AUTO_INCREMENT for dumped tables
--

--
-- AUTO_INCREMENT for table `Student`
--
ALTER TABLE `Student`
MODIFY `id` int(10) NOT NULL AUTO_INCREMENT,AUTO_INCREMENT=2;
/*!40101 SET [email protected]_CHARACTER_SET_CLIENT */;
/*!40101 SET [email protected]_CHARACTER_SET_RESULTS */;
/*!40101 SET [email protected]_COLLATION_CONNECTION */;

2.  测试代码如下

package mybatisInsertDataDemo;

import java.io.InputStream;

import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import mybatisInsertDataDemo.Student;
import mybatisInsertDataDemo.demo;

public class demo {

	public static void main(String[] args) {

	    String resource = "mybatisInsertDataDemo/conf.xml";
		InputStream is = demo.class.getClassLoader().getResourceAsStream(resource);

		if(null == is)
		{
			System.out.println("inputstream is null");
			return;
		}

		 SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder().build(is);

	     long start = System.currentTimeMillis();

	     for(int i=0;i<10000;i++)
	     {
	    	 SqlSession session = sessionFactory.openSession();

		     String statement = "mybatisInsertDataDemo.studentMapper.insertStudent";
	    	  Student s = new Student();
		     s.setAge(20);
		     s.setName("lisi");

		     session.insert(statement, s);

		     session.close();
	     }

	     System.out.println("waste time  "+(System.currentTimeMillis()-start));

	}
}

　3.  打开与关闭连接池 配置

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC" />
            <!-- 配置数据库连接信息 -->
            <dataSource type="UNPOOLED">  <!--UNPOOLED 是关闭连接池，POOLED 是打开连接池-->
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis" />
                <property name="username" value="root" />
                <property name="password" value="" />
            </dataSource>
        </environment>
    </environments>

    <mappers>
        <mapper resource="mybatisInsertDataDemo/studentMapper.xml"/>
    </mappers>

</configuration>

4. 对比结果

插入一万条数据

打开连接池：  6s

关闭连接池：  36s