Mybatis实现sql执行的第一种方式，写接口的实现类

package com.bjpowernode.dao.impl;

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

import java.util.List;

public class StudentDaoImpl implements StudentDao {

    @Override
    public List<Student> selectStudents() {
        String sqlId = "com.bjpowernode.dao.StudentDao.selectStudents";
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        List<Student> list = sqlSession.selectList(sqlId);
        return list;
    }

    @Override
    public int insertStudent(Student student) {
        String sqlId = "com.bjpowernode.dao.StudentDao.insertStudent";
        SqlSession sqlSession = MybatisUtils.getSqlSession();
        int num = sqlSession.insert(sqlId,student);
        sqlSession.commit();
        return num;
    }

    public static void main(String[] args) {
        StudentDaoImpl dao = new StudentDaoImpl();
/*        List<Student> list = dao.selectStudents();
        for(Student stu:list){
            System.out.println("查询出的学生信息："+stu);
        }*/
        Student student = new Student();
        student.setAge(20);
        student.setEmail("ww@qq.com");
        student.setId(1004);
        student.setName("王五");
        int num = dao.insertStudent(student);
        System.out.println("执行了"+num+"行数据的插入操作");
    }
}