mybatis入门_配置文件

主配置文件:SqlSessionConfiguration.xml（用的话需要改基本四项）

<?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>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <!--基本四项-->
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="mysql:jdbc:///ssm"/>
                <property name="username" value="root"/>
                <property name="password" value="root"/>
            </dataSource>
        </environment>
    </environments>
    <mappers>
        <mapper resource="RoleMapper.xml"/>
    </mappers>
</configuration>

Mapper文件:RoleMapper.xml(用的话需要改命名空间的基本信息)

<?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">
<!--命名空间-->
<mapper namespace="com.itheima.dao.RoleDao">
    <select id="findRoles" resultType="com.itheima.domain.Role">
        select * from role
    </select>
</mapper>

来源：CSDN

作者：「已注销」

链接：https://blog.csdn.net/weixin_45897823/article/details/104760401