SQL資源配置文件

<?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核心配置文件 -->
<configuration>


    <!-- 引入外部配置文件 -->
    <properties resource="db.properties">
    </properties>

    <settings>
        <setting name="logImpl" value="STDOUT_LOGGING"/>
<!--        <setting name="logImpl" value="LOG4J"/>-->
    </settings>

    <typeAliases>
        <package name="com.sxw.pojo" />
    </typeAliases>

    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="${driver}"/>
                <property name="url" value="${url}"/>
                <property name="username" value="${username}"/>
                <property name="password" value="${password}"/>
            </dataSource>
        </environment>

        
    </environments>

    <!-- 每一個mapper.xml都需要在mybatis核心配置文件中註冊 -->
    <mappers>
        <mapper class="com.sxw.dao.UserMapper"/>
    </mappers>
</configuration>