Mybatis实现sql执行的第二种方式，使用动态代理。

package com.bjpowernode;

import com.bjpowernode.dao.StudentDao;
import com.bjpowernode.domain.Student;
import com.bjpowernode.utils.MybatisUtils;
import org.apache.ibatis.session.SqlSession;
import org.junit.Test;

import java.util.List;

/**
 * @author lihp
 * @version 1.0
 * @since 1.0
 * 使用动态代理的方式sqlsession.getMapper(dao.class）获取dao接口对象,执行对应方法即可
 * 这样做不用去写StudentDao接口的实现类就可以直接执行对应sql语句
 * 要求就是我们sqlMapper文件要书写规范，namespace要写dao接口的全限定名称，标签id要写接口方法名
 */
public class TestMybatis {
    @Test
    public void testSelectStudents(){
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        StudentDao dao = sqlSession.getMapper(StudentDao.class);
        List<Student> list = dao.selectStudents();
        for(Student stu:list){
            System.out.println(stu);
        }
        sqlSession.close();
    }

    @Test
    public void testInsertStudent(){
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        StudentDao dao  = sqlSession.getMapper(StudentDao.class);
        Student student = new Student();
        student.setId(1006);
        student.setName("王楠");
        student.setEmail("wangnan@qq.com");
        student.setAge(29);
        dao.insertStudent(student);
        sqlSession.commit();
        sqlSession.close();
    }
}