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  • [刘阳Java]_MyBatis_注解基本用法_第10讲

    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
    package com.gxa.test;
    
    import java.io.IOException;
    import java.io.Reader;
    import java.util.List;
    
    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.Test;
    
    import com.gxa.dao.TeacherDao;
    import com.gxa.pojo.Student;
    import com.gxa.pojo.Teacher;
    
    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() {
            SqlSessionsqlSession = sqlSessionFactory.openSession();
            TeacherDaoteacherDao = sqlSession.getMapper(TeacherDao.class);
            List<Teacher> list = teacherDao.getTeacher();
            for (Teacher teacher : list) {
                System.out.println(teacher.getT_id() + "=====" + teacher.getT_name());
            }
            sqlSession.close();
        }
        
    }
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  • 原文地址:https://www.cnblogs.com/liuyangjava/p/6629259.html
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