Mybatis学习——配置MyBatis

1. 坐标


    org.mybatis
    mybatis
    3.4.6

2. Resource配置sqlMapperConfig.xml

　　用于配置数据库

DOCTYPE configuration PUBLIC "-//mybatis.org//DTD Config 3.0//EN" "http://www.mybatis.org/dtd/mybatis-3-config.dtd">
<configuration>
    
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC">transactionManager>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://127.0.0.1:3306/mybits_test"/>
                <property name="username" value="root"/>
                <property name="password" value="xxxxxxxxx"/>
            dataSource>
        environment>
    environments>

    
    <mappers>
        <mapper resource="xyz/javaswing/mapper/userMapper.xml"/>
    mappers>

configuration>

　　配置标签

<typeAliases>
        <typeAlias type="xyz.javaswing.domain.User" alias="user"/>
typeAliases>

 ........

　　配置标签

    
    <mappers>
        <mapper resource="xyz/javaswing/mapper/userMapper.xml"/>
    mappers>

3. Resource创建对应domain被名为Mapper相应文件夹，其中创建sql语句配置文件 UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://www.mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="userMapper">
    <select id="select" resultType="xyz.javaswing.domain.User">
        select * from user
    select>
mapper>

UserMapper.xml里

　　1. mapper定义语句大类

　　2. 使用