CREATE DATABASE `mybatis`;

USE mybatis;

DROP TABLE `user`;

CREATE TABLE `user` (
    `id` INT(20) NOT NULL PRIMARY KEY,
    `name` VARCHAR(30) DEFAULT NULL,
    `pwd` VARCHAR(30) DEFAULT NULL    
)ENGINE=INNODB DEFAULT CHARSET=utf8;

INSERT INTO `user`(id, `name`, `pwd`) VALUES
(1, ‘张三‘, ‘123456‘),
(2, ‘李四‘, ‘163561‘),
(3, ‘王五‘, ‘123698‘);

<!--导入依赖-->
    <dependencies>
        <dependency>
            <groupId>org.mybatis</groupId>
            <artifactId>mybatis</artifactId>
            <version>3.5.5</version>
        </dependency>

        <!--mysql驱动-->
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.22</version>
        </dependency>

        <!--junit-->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

<?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核心配置文件-->
<configuration>
    <environments default="development">
        <environment id="development">
            <transactionManager type="JDBC"/>
            <dataSource type="POOLED">
                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
                <property name="url" value="jdbc:mysql://localhost:3306/mybaits?characterEncoding=utf-8&amp;serverTimezone=UTC"/>
                <property name="username" value="root"/>
                <property name="password" value="123456"/>
            </dataSource>
        </environment>
    </environments>
</configuration>

//获取SqlSession对象
public class MybatisUtils {
    
    private static SqlSessionFactory sqlSessionFactory;

    static {
        try {
            //获取SqlSessionFactory对象
            String resource= "";
            InputStream inputStream = Resources.getResourceAsStream(resource);
            sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    public static SqlSession getSqlSession() {
        return sqlSessionFactory.openSession();
    }
}

public interface UserDao {
?
    List<User> getUserList();
}

<?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">

<!--namespace绑定一个对应的Dao接口-->
<mapper namespace="com.gazikel.dao.UserDao">
    <select id="getUserList" resultType="com.gazikel.pojo.User">
        select * from mybatis
    </select>
</mapper>

<mappers>
　　<mapper resource="com/gazikel/dao/UserMapper.xml"/>
</mappers>

 <!--在build中配置resources，来防止我们资源导出失败的问题-->
    <build>
        <resources>
            <resource>
                <directory>src/main/resources</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>

            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>true</filtering>
            </resource>
        </resources>
    </build>