关于Mybatis的sql注释问题

//mapper下的sql注释

package com.msb.mapper;

import com.msb.pojo.Dept;

import com.msb.pojo.Emp;

import org.apache.ibatis.annotations.Delete;

import org.apache.ibatis.annotations.Insert;

import org.apache.ibatis.annotations.Select;

import org.apache.ibatis.annotations.Update;

import java.awt.*;

public interface EmpTestMapper {

    @Select("select * from dept where deptno =#{deptno}")

    Dept findByDeptno(int deptno);

    @Update("update dept set dname =#{dname}, loc =#{loc} where deptno =#{deptno}")

    int updateDept(Dept dept);

    @Insert("insert into dept values(DEFAULT,#{dname},#{loc})")

    int addDept(Dept dept);

    @Delete("delete from dept where deptno =#{deptno}")

    int removeDept(int deptno);

}

import com.msb.mapper.DeptMapper;

import com.msb.mapper.EmpMapper;

import com.msb.mapper.EmpTestMapper;

import com.msb.pojo.Dept;

import com.msb.pojo.Emp;

import com.msb.pojo.Projectrecord;

import com.msb.pojo.Projects;

import org.apache.ibatis.io.Resources;

import org.apache.ibatis.session.SqlSession;

import org.apache.ibatis.session.SqlSessionFactory;

import org.apache.ibatis.session.SqlSessionFactoryBuilder;

import org.junit.After;

import org.junit.Before;

import org.junit.Test;

import java.io.IOException;

import java.io.InputStream;

import java.util.Date;

import java.util.List;
public class Test1 {

    SqlSession sqlSession = null;

    EmpMapper mapper =null;

   @Before

   public void test1(){

       //首先做一个对象SqlSessionFactoryBuilder建立一个绘话

       SqlSessionFactoryBuilder ssfb = new SqlSessionFactoryBuilder();

       //有一个文本输入的io流进行读取操作

       InputStream stream = null;

       try {

           //这里的路径直接会定位到配置文件classes下面；所以这个文件在次目录下--编译和

           //-图纸；对数据库文件进行读取，获取一个io流，由于配置文件在classes下面，直接写文件名即可

           stream = Resources.getResourceAsStream("sqlMapConfig.xml");

       } catch (IOException e) {

           e.printStackTrace();

       }

       //build需要指向一个文件进行读取出来--工厂

       SqlSessionFactory factory = ssfb.build(stream);

        //需要用sqlSession去调用增删改查--工人去获取数据，打开这个绘话

       sqlSession = factory.openSession(true);

   }
    @Test

    public void test4(){

        EmpTestMapper mapper = sqlSession.getMapper(EmpTestMapper.class);

        Dept emp = mapper.findByDeptno(20);

        Dept dept = new Dept();

        dept.setDeptno(null);

        dept.setLoc("大格");

        dept.setDname("水军");

        int addDept = mapper.addDept(dept);

        System.out.println(addDept);

        System.out.println(emp);

    }
    @After

    public void test3(){

       if (sqlSession!=null){

           sqlSession.close();

       }

    }

}
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