1.添加项目需要的依赖
<dependency>
<groupId>org.mybatis</groupId>
<artifactId>mybatis</artifactId>
<version>3.4.6</version>
</dependency>
<!-- https://mvnrepository.com/artifact/mysql/mysql-connector-java -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<version>5.1.46</version>
</dependency>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
</dependency>
2.在resoueces中添加mybatis主配置文件mybatis.xml
在主配置文件中添加数据库信息及具体mapper映射 此处省略创建数据库及子表和添加数据
<?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">
<property name="driver" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/mytest"/>
<property name="username" value="root"/>
<property name="password" value="123456"/>
</dataSource>
</environment>
</environments>
<mappers>
<mapper resource="mapper/usersMapper.xml"/>
</mappers>
</configuration>
3.创建数据库表对应的实体类Users
保持实体类和表中的字段名一致
4.创建Users的mapper文件
<?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="com.zhangflg.mybatis.entity.Users">
<select id="usersList" resultType="com.zhangflg.mybatis.entity.Users">
select * from users
</select>
</mapper>
5.测试mybatis基础使用
String resources = "mybatis.xml";
InputStream is = Resources.getResourceAsStream(resources);
SqlSessionFactory factory =
new SqlSessionFactoryBuilder().build(is);
SqlSession session = factory.openSession();
List<Users> ulist = session.selectList("usersList");
for (Users u : ulist) {
System.out.println(u);
}
session.close();