2021-10-12

Mybatis创建过程
1.在resource下创建mybatis-config.xml,用于连接数据库

2.创建工具类从 XML 中构建 SqlSessionFactory

public class MybatisUtils{
private static SqlSessionFactory sqlSessionFactory;
static{
try{
String resource = "org/mybatis/example/mybatis-config.xml";
InputStream inputStream = Resources.getResourceAsStream(resource);
SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder().build(inputStream);
}catch(IOException e){
e.printStackTrace();
}
}
public static SqlSession getSqlSession(){
return sqlSessionFactory.openSession();
}
}

3.实体类例如User
4.UserMapper（UserDao）

public interface UserMapper{
    public List findAll();
}

5.创建UserMapper.xml

  
    select * from Blog where id = #{id}