mybatis笔记【处理多个字段的问题】|mybatis输出日志到文件

例子1：
mapper层：

    List<Map> queryBookCondition(@Param("params") Map<String, Object> params);

对应的mapper实现层：

public PageInfo<Map> queryBookCondition(Map<String, Object> params) {
    
    
        PageHelper.startPage(Integer.parseInt(params.get("pageNum").toString()), Integer.parseInt(params.get("pageSize").toString()));
        List<Map> maps = bookMapper.queryBookCondition(params);
        PageInfo<Map> mapPageInfo = new PageInfo<>(maps);
        return mapPageInfo;
    }

对应的mybatis写法:

<select id="queryBookCondition" resultType="map">
        select
        book_id bookId, book_name bookName, book_number bookNumber, book_picture bookPicture, price, type_name typeName, deleted
        from A.book b LEFT JOIN A.book_type t ON b.type_id = t.type_id
        where 1 = 1
        <if test="params.searchKey == 'bookName'">
            AND b.book_name like CONCAT("%",#{params.searchValue},"%")
        </if>
        <if test="params.searchKey == 'typeName'">
            AND type_name like CONCAT("%",#{params.searchValue},"%")
        </if>
        <if test="params.searchKey == 'price'">
            AND price like CONCAT("%",#{params.searchValue},"%")
        </if>
        <if test="params.searchKey == 'bookNumber'">
            AND book_number like CONCAT("%",#{params.searchValuer},"%")
        </if>
        order by b.book_id DESC
    </select>

例子2：

int insertBatch(@Param("book") List<Book> entities);

<insert id="insertBatch" keyProperty="bookId" useGeneratedKeys="true">
        insert into A.book(book_name, book_number, book_picture, description, book_press, price,
        book_type)
        values
        <foreach collection="entities" item="entity" separator=",">
            (#{entity.bookName}, #{entity.bookNumber}, #{entity.bookPicture}, #{entity.description},
            #{entity.bookPress}, #{entity.price}, #{entity.bookType})
        </foreach>
    </insert>

关于keyProperty可以参考：关于Mybatis中keyProperty属性

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springboot整合mybatis-plus的sql输出到日志文件上——百度：mybatisplus输出到文件
springboot 下mybatis-plus 如何打印sql日志和参数到日志文件|来源→

#控制台方式（本地启动日志打印到控制台常用方式）：
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl

#文件方式，需结合logginglevel
mybatis-plus:
  configuration:
    log-impl: org.apache.ibatis.logging.slf4j.Slf4jImpl
logging:
  level:
    com.baomidou.mybatisplus: DEBUG
    #这个是配置的mapper路径，如：cn.example.mapper
    cn.example.mapper: DEBUG