Java67

Posted 2021-06-30 码农编程录

文章目录

• 1.CheckItemMapper.java
• CheckItemMapper.xml

---

1.CheckItemMapper.java

package com.itheima.mapper;
import com.itheima.pojo.CheckItem;
import org.apache.ibatis.annotations.Param;
import java.util.List;

public interface CheckItemMapper {
    void add(CheckItem checkItem);

    List<CheckItem> findByCondition(@Param("queryString") String queryString);

    Integer findCountByCheckItemId(@Param("id")Integer id);

    void deleteById(@Param("id")Integer id);

    CheckItem findById(@Param("id")Integer id);

    void edit(CheckItem checkItem);

    List<CheckItem> findAll();

    List<Integer> findCheckItemIdsByCheckGroupId(@Param("checkGroupId")Integer checkGroupId);

    /***
     * 只要参数不是pojo\\Map都使用@Param
     *
     * @param queryString
     * @return
     */
//    Long findCount(@Param("queryString") String queryString);

//    List<CheckItem> findByCondition(@Param("firstResult")int firstResult, @Param("pageSize")Integer pageSize, @Param("queryString")String queryString);

}

CheckItemMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
        PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.itheima.mapper.CheckItemMapper">

    <insert id="add">
        insert into t_checkitem values(null,#{code},#{name},#{sex},#{age},#{price},#{type},#{attention},#{remark})
    </insert>

    <!--条件查询总记录数-->
   <!-- <select id="findCount" resultType="Long">
        select count(id) from t_checkitem
        <if test="queryString!=null and queryString.trim()!=''">
            where code = #{queryString} or name like "%" #{queryString} "%"
        </if>
    </select>-->

    <!--查询分页数据-->
    <!--<select id="findByCondition" resultType="CheckItem">
        select * from t_checkitem
        <if test="queryString!=null and queryString.trim()!=''">
            where code = #{queryString} or name like "%" #{queryString} "%"
        </if>
        limit #{firstResult},#{pageSize}
    </select>-->

    <select id="findByCondition" resultType="CheckItem">
        select * from t_checkitem
        <if test="queryString!=null and queryString.trim()!=''">
            where code = #{queryString} or name like "%" #{queryString} "%"
        </if>
    </select>

    <!--通过id统计当前检查项是否被引用过-->
    <select id="findCountByCheckItemId" resultType="Integer">
        select count(checkitem_id) from t_checkgroup_checkitem where checkitem_id = #{id}
    </select>

    <!--通过id删除检查项-->
    <delete id="deleteById">
        delete from  t_checkitem where id = #{id}
    </delete>

    <!--通过id查询检查项-->
    <select id="findById" resultType="CheckItem">
        select * from t_checkitem where id = #{id}
    </select>

    <!--编辑更新-->
    <update id="edit">
        update t_checkitem
        <set>
            <if test="code !=null">
                code = #{code},
            </if>
            <if test="name !=null">
                name = #{name},
            </if>
            <if test="sex !=null">
                sex = #{sex},
            </if>
            <if test="age !=null">
                age = #{age},
            </if>
            <if test="price !=null">
                price = #{price},
            </if>
            <if test="type !=null">
                type = #{type},
            </if>
            <if test="attention !=null">
                attention = #{attention},
            </if>
            <if test="remark !=null">
                remark = #{remark}
            </if>
        </set>
        where id = #{id}

    </update>

    <!--查询所有检查项-->
    <select id="findAll" resultType="CheckItem">
        select * from t_checkitem
    </select>


    <select id="findCheckItemIdsByCheckGroupId" resultType="Integer">
        select checkitem_id from t_checkgroup_checkitem where checkgroup_id = #{checkGroupId}
    </select>


    <select id="findCheckItemByCheckGroupId" resultType="CheckItem">
        select * from t_checkitem where id in (select checkitem_id from t_checkgroup_checkitem where checkgroup_id=#{checkGroupId})
    </select>
</mapper>