Mybatis别名的使用

Mybatis别名的使用

<?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>
    <!--这里是起的别名，前面是名，后面是路径-->
    <!--<typeAliases>
        <typeAlias alias="dept" type="com.msb.pojo.Dept"/>
    </typeAliases>-->
    <!--包别名，用到时候调用名字小写即可,就会扫描msb下的所以实体类，用的时候实体类名小写-->
    <typeAliases>
        <package name="com.msb"/>
    </typeAliases>
    <environments default="development">
        <environment id="development">
            <!--   简单使用了 JDBC 的提交和回滚设置  -->
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">

                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://127.0.0.1:3306/mydb?useSSL=false&amp;useUnicode=true&amp;characterEncoding=UTF-8&amp;serverTimezone=Asia/Shanghai"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>
    <!--加载mapper映射文件-->
    <mappers>
        <mapper resource="com/msb/mapper/DeptMapper.xml"/>
    </mappers>
</configuration>

具体应用

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="aaa">
    <!--public List<Dept> findAll(){    }-->
    <select id="findAll" resultType="dept" >
        select * from dept
    </select>
</mapper>