后端返给前端的两种json形式,字符串数组形式和对象数组形式

记录sql
用于实体类里返回json形式
第一种 第二个集合字符串形式显示

< ? 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” >

    SELECT
    mu.multimedia_title as title,
    mu.multimedia_id as multimediaId,
    mu.file_type as fileType,
    le.lecturer as lecturer,
    le.lecturer_desc as lecturerDesc,
    mu.multimedia_type as multimediaType,
    mu.file_path as filePath,
    mtr.tag_id as tagId,
    le.good_skills as goodSkills,
    le.`desc` as `desc`,
    mu.create_time as createTime
    FROM
    multimedia mu
    LEFT JOIN lecturer le on le.multimedia_id= mu.multimedia_id
    left join multimedia_tag_relation mtr on mtr.multimedia_id= le.multimedia_id
    
        
            and mu.multimedia_title like concat('%',#{dto.title},'%')
        

        
            and le.lecturer like concat('%',#{dto.lecturer},'%')
        

        
            and mu.multimedia_type= #{dto.type}
        

        
            and mu.create_time >= #{dto.createStartTime}
        

        
            and  mu.create_time <= #{dto.createEndTime}
        

        
            and (le.lecturer_desc is not null and le.good_skills is not null  and le.desc is not null)
        

        
            and (le.lecturer_desc is null and le.good_skills is null  and le.desc is null)
        

        
            and mtr.tag_id is not null
        

        
            and mtr.tag_id is  null
        
    
    order by mu.create_time desc

记录sql
用于实体类里返回json形式
第二种 第二个集合封装对象形式显示
<
? 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.zx.erp.media.addvideo.mapper.MultimediaSelectMapper”>

    SELECT
    mu.multimedia_title as title,
    mu.multimedia_id as multimediaId,
    mu.file_type as fileType,
    le.lecturer as lecturer,
    le.lecturer_desc as lecturerDesc,
    mu.multimedia_type as multimediaType,
    mu.file_path as filePath,
    mtr.tag_id as tagId,
    le.good_skills as goodSkills,
    le.`desc` as `desc`,
    mu.create_time as createTime
    FROM
    multimedia mu
    LEFT JOIN lecturer le on le.multimedia_id= mu.multimedia_id
    left join multimedia_tag_relation mtr on mtr.multimedia_id= le.multimedia_id
    
        
            and mu.multimedia_title like concat('%',#{dto.title},'%')
        

        
            and le.lecturer like concat('%',#{dto.lecturer},'%')
        

        
            and mu.multimedia_type= #{dto.type}
        

        
            and mu.create_time >= #{dto.createStartTime}
        

        
            and  mu.create_time <= #{dto.createEndTime}
        

        
            and (le.lecturer_desc is not null and le.good_skills is not null  and le.desc is not null)
        

        
            and (le.lecturer_desc is null and le.good_skills is null  and le.desc is null)
        

        
            and mtr.tag_id is not null
        

        
            and mtr.tag_id is  null