MyBatis注解提出，可以说是非常好简化了MyBatis配置文件的使用。下面我们简单地来告诉大家如何使用MyBatis的注解
- 定义接口
package com.gxa.dao;
import java.util.List;
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 com.gxa.pojo.Teacher;
public interface TeacherDao {
@Insert("insert into teacher (t_id,t_name) values (#{t_id},#{t_name})")
public intinsertTeacher(Teacher teacher);
@Update("update teacher set t_name=#{t_name} where t_id=#{t_id}")
public intupdateTeacher(Teacher teacher);
@Delete("delete from teacher where t_id = #{t_id}")
public intdeleteTeacher(intt_id);
@Select("select * from teacher")
public List<Teacher>getTeacher();
}
- 在MyBatis核心配置文件注册好映射接口
<mapper class="com.gxa.dao.TeacherDao"/>
- 马上来使用Java程序来测试一下
public class Test04 {
private static SqlSessionFactorysqlSessionFactory;
private static Reader reader;
static {
try {
reader = Resources.getResourceAsReader("config.xml");
sqlSessionFactory = new SqlSessionFactoryBuilder().build(reader);
} catch (IOException e) {
e.printStackTrace();
}
}
@Test
public void m01() {
SqlSession sqlSession = sqlSessionFactory.openSession();
TeacherDao teacherDao = sqlSession.getMapper(TeacherDao.class);
List<Teacher> list = teacherDao.getTeacher();
for (Teacher teacher : list) {
System.out.println(teacher.getT_id() + "=====" + teacher.getT_name());
}
sqlSession.close();
}
}
