一、mybatis配置文件
<?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="userDefine">
<environment id="userDefine">
<transactionManager type="JDBC" />
<!-- 配置数据库连接信息 -->
<dataSource type="cn.com.ibatisdemo.ibatisdemo.UserDefineDataSourceFactory">
<property name="driver" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/db1" />
<property name="username" value="root" />
<property name="password" value="root" />
<!-- 初始化连接大小
<property name="initialSize" value="0" />-->
<!-- 连接池最大使用连接数量-->
<property name="maxActive" value="20" />
<!-- 连接池最小空闲 -->
<property name="minIdle" value="0" />
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="sql.xml"/>
</mappers>
</configuration>
二、自定义数据源的两种写法
自定义数据源整合阿里巴巴温少的druid数据库连接池
方案一:
extends DruidDataSourceFactory implements DataSourceFactory
方案二:
extends UnpooledDataSourceFactory
package cn.com.ibatisdemo.ibatisdemo;
import java.util.Map;
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.ibatis.datasource.DataSourceFactory;
import org.apache.ibatis.datasource.unpooled.UnpooledDataSourceFactory;
import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.pool.DruidDataSourceFactory;
public class UserDefineDataSourceFactory extends DruidDataSourceFactory implements DataSourceFactory{
protected Properties properties;
@Override
public void setProperties(Properties props) {
this.properties= props;
}
@Override
public DataSource getDataSource() {
try {
return createDataSource(properties);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
} /*extends UnpooledDataSourceFactory {
protected DataSource dataSource;
public UserDefineDataSourceFactory() {
this.dataSource = new DruidDataSource();
}
}*/
测试代码:
package cn.com.ibatisdemo.ibatisdemo;
import java.io.IOException;
import java.io.Reader;
import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;
import com.alibaba.druid.pool.DruidDataSourceFactory;
public class TestDruidDemo {
/**
* @param args
* @throws Exception
*/
public static void main(String[] args) throws Exception {
String resource = "conf.xml";
// 使用类加载器加载mybatis的配置文件(它也加载关联的映射文件)
Reader reader = Resources.getResourceAsReader(resource);
// 构建sqlSession的工厂
SqlSessionFactory sessionFactory = new SqlSessionFactoryBuilder()
.build(reader,"userDefine");
SqlSession session = sessionFactory.openSession();
System.out.println(session);
session = sessionFactory.openSession();
System.out.println(session);
DruidDataSourceFactory f;
}
}
三、测试结果
方案一:
extends DruidDataSourceFactory implements DataSourceFactory
方案二:
extends UnpooledDataSourceFactory