mybatis.xml

<?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>

    <!-- 这是吧账号密码放在了这个properties里面，再读取一下 -->

    <!-- 设置类的别名  alias就是设置别名-->
    <typeAliases>
        <typeAlias type="com.qianfeng.curd.Person" alias="Person"/>
    </typeAliases>
    <environments default="development">
        <!-- 配置数据库的连接 -->
        <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}" /> diver=com.mysql.jdbc.Driver url=jdbc:mysql://localhost:3306/my1804 
                    username=root password=lin -->
                <!-- ${} 读取属性文件中的数据 -->
                <property name="driver" value="com.mysql.jdbc.Driver" />
                <property name="url" value="jdbc:mysql://localhost:3306/mybatis1804" />
                <property name="username" value="root" />
                <property name="password" value="lin" />
            </dataSource>
        </environment>
    </environments>

    <!-- 引入映射文件 -->
    <mappers>
        <mapper resource="com/qianfeng/first/PersonMapper.xml" />
    </mappers>
</configuration>