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package demo2;import entity.Employee;public interface EmployeeMapper {public Employee getById(int id);}

 

 

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      13         select * from employee where id = #{id}14       15 
     

 

1 package demo2; 2  3 import java.io.IOException; 4 import java.io.InputStream; 5  6 import org.apache.ibatis.io.Resources; 7 import org.apache.ibatis.session.SqlSession; 8 import org.apache.ibatis.session.SqlSessionFactory; 9 import org.apache.ibatis.session.SqlSessionFactoryBuilder;10 import entity.Employee;11 12 public class Demo2 {13 14     public static void main(String[] args) throws IOException {15         // 1、获取sessionFactory16         String resource = "mybatis-config.xml";17         InputStream inputStream = Resources.getResourceAsStream(resource);18         SqlSessionFactory sqlSessionFactory = new SqlSessionFactoryBuilder()19                 .build(inputStream);20         // 2、获取 session21         SqlSession session = sqlSessionFactory.openSession();22         // 3、获取接口的是实现类对象 自动代理23         EmployeeMapper mapper = session.getMapper(EmployeeMapper.class);24 25         Employee employee = mapper.getById(1);26         System.out.println(employee.toString());27         session.close();28     }29 }