Mybatis的增删改以及log4j的配置

带条件查询

mapper文件的内容:

 <select id="getSelectElectron" resultType="electron">
        select * from electron where date > #{date}
    </select>

select的实现:

 public void getSelectElectron() throws Exception {
            Date date =new SimpleDateFormat("yyyy-MM-dd").parse("2015-12-31");
            List<electron> getalluser = sqlSession.getMapper(ElectronDao.class).getSelectElectron(date);
            for (electron user: getalluser) {
                System.out.println(user.getType());
            }

        }

增加操作

mapper文件的内容:

 <insert id="InsElectronDao"  useGeneratedKeys="true" keyProperty="id" parameterType="electron">
        insert into electron (id,type,price,date) values (#{id},#{type},#{price},#{date})
    </insert>

insert的实现:

//添加操作
        public void InsElectronDao() throws Exception {
            BigDecimal decimal =new BigDecimal("2356.23");
            Date date =new SimpleDateFormat("yyyy-MM-dd").parse("2016-10-25");
            electron elect = new electron(5,"CDMA-2", decimal,date);
            Integer integer = sqlSession.getMapper(ElectronDao.class).InsElectronDao(elect);
            System.out.println("id："+elect.getId());
            if (integer>0){
                sqlSession.commit();
                System.out.println("添加成功！");
            }else{
                System.out.println("添加失败!");
            }
        }

修改操作

mapper文件的内容:

  <update id="UpdateElectronDao" parameterType="electron">
        update electron set type=#{type},price=#{price},date=#{date} where id=#{id}
    </update>

update的实现：

//修改操作
        public void UpdateElectronDao() throws Exception {
            BigDecimal decimal =new BigDecimal("2356.23");
            Date date =new SimpleDateFormat("yyyy-MM-dd").parse("2016-10-25");
            electron elect = new electron(2,"CDMA-2", decimal,date);
            Integer integer = sqlSession.getMapper(ElectronDao.class).UpdateElectronDao(elect);
            if (integer>0){
                sqlSession.commit();
                System.out.println("修改成功！");
            }else{
                System.out.println("修改失败!");
            }
        }

删除的操作：

mapper文件的内容:

 <delete id="DelElectronDao">
        delete from  electron where id=#{id}
    </delete>

delete的实现:

//删除操作
        public void DelElectronDao() throws Exception {
            Integer integer = sqlSession.getMapper(ElectronDao.class).DelElectronDao(4);
            if (integer>0){
                sqlSession.commit();
                System.out.println("删除成功！");
            }else{
                System.out.println("删除失败!");
            }
        }

来源：https://www.cnblogs.com/wishsaber/p/11604133.html

标签

date

log4j配置

log4j

electron

MyBatis