Three MyBatis core configuration files

Three MyBatis core configuration files

This article is the third section, and this column records the whole process of MyBatis learning
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Relevant official website instructions -> click to enter

<?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">
                <!--数据库连接信息-->
                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql:///mybatis?serverTimezone=UTC"/>
                <property name="username" value="root"/>
                <property name="password" value="123456"/>
            </dataSource>
        </environment>
    </environments>
    <!--    SQL映射文件位置-->
    <mappers>
        <mapper resource="org/example/mapper/UserMapper.xml"/>
    </mappers>
</configuration>

• The configuration of the environment data source. There can be multiple, that is, multiple database defaults can be configured in the future to determine which database to use
• The management method of transactionManager transaction here defaults to the JDBC method
• dataSource database connection pool The default connection pool of MyBatis is POOLED, which configures the connection information of the data source

<typeAliases>
    <package name="org.example.pojo"/>
</typeAliases>

This is how to configure the alias

The meaning of this configuration is: automatically scan the classes under the org.example.pojo package in the future, and use the class name directly when citing it in the future. It is not case-sensitive, and there is no need to write the previous package name.

For detailed configuration information, see the official website at the beginning