Mybatis中mybatis-config.xml文件的解析

<?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">

<!-- 通过这个配置文件完成mybatis与数据库的连接 -->
<configuration>

    <!-- 引入 database.properties 文件-->
    <properties resource="database.properties"/>
    
    <settings>
        <!-- 配置mybatis的log实现为LOG4J -->
        <setting name="logImpl" value="LOG4J" />
        <!-- 
            设置resultMap的自动映射级别为:
            NONE
            PARTIAL(默认)
            FULL
        -->
         <!-- <setting name="autoMappingBehavior" value="FULL" />  -->
        <!-- <setting name="autoMappingBehavior" value="NONE" />  -->
    </settings>
    
    <!--类型别名-->
    <typeAliases>
         <!-- <typeAlias alias="User" type="cn.smbms.pojo.User"/> -->
         <package name="cn.smbms.pojo"/>
    </typeAliases>
    
    <environments default="development">
        <environment id="development">
            <!--配置事务管理，采用JDBC的事务管理  -->
            <transactionManager type="JDBC"></transactionManager>
            <!-- POOLED:mybatis自带的数据源，JNDI:基于tomcat的数据源 -->
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <property name="url" value="${url}"/>
                <property name="username" value="${user}"/>
                <property name="password" value="${password}"/>
            </dataSource>
        </environment>
    </environments>
    
    <!-- 将mapper文件加入到配置文件中 -->
    <mappers>
        <mapper resource="cn/smbms/dao/user/UserMapper.xml"/>
    </mappers>

</configuration>