MyBatis(3.2.3) - Configuring MyBatis using XML, Environment

The key component of MyBatis is SqlSessionFactory from which we get SqlSession and execute the mapped SQL statements. The SqlSessionFactory object can be created using XML-based configuration or Java API.

The most commonly used approach for building SqlSessionFactory is XML-based configuration. The following mybatis-config.xml file shows how a typical MyBatis configuration file looks: 

<?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>

    <properties resource="application.properties">
        <property name="username" value="db_user"/>
        <property name="password" value="verysecurepwd"/>
    </properties>
    <settings>
        <setting name="cacheEnabled" value="true"/>
    </settings>
    
    <typeAliases>
        <typeAlias alias="Tutor" type="com.mybatis3.domain.Tutor"/>
        <package name="com.mybatis3.domain"/>
    </typeAliases>
    <typeHandlers>
        <typeHandler handler="com.mybatis3.typehandlers.PhoneTypeHandler"/>
        <package name="com.mybatis3.typehandlers"/>
    </typeHandlers>
    
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${jdbc.driverClassName}"/>
                <property name="url" value="${jdbc.url}"/>
                <property name="username" value="${jdbc.username}"/>
                <property name="password" value="${jdbc.password}"/>
            </dataSource>
        </environment>
        <environment id="production">
            <transactionManager type="MANAGED"/>
            <dataSource type="JNDI">
                <property name="data_source" value="java:comp/jdbc/MyBatisDemoDS"/>
            </dataSource>
        </environment>
    </environments>
    
    <mappers>
        <mapper resource="com/mybatis3/mappers/StudentMapper.xml"/>
        <mapper url="file:///D:/mybatisdemo/mappers/TutorMapper.xml"/>
        <mapper class="com.mybatis3.mappers.TutorMapper"/>
    </mappers>
    
</configuration>

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