mabatis自动生成的界面，想要list界面的列表多显示内容

1.实体类加上想多余显示，或是id转换成name的字段

封面，权重就是新加的

    /**
     * 删除时间
     */
    private LocalDateTime deleteTime;


    /**
     * 封面
     */
    @TableField(exist = false)
    private String picture;
    /**
     * 权重
     */
    @TableField(exist = false)
    private Integer weight;

2.controller会有一个分页就是limit的page()方法,咱们自己写一个方法对应

    @RequestMapping
    public String index(Model model,@RequestParam(value = "pageNo", required = false, defaultValue = "1") Integer pageNo,@RequestParam(value = "pageSize", required = false, defaultValue = "20") Integer pageSize, String createTimeSpace, String updateTimeSpace, String deleteTimeSpace, Chapters chapters) {
        Page<Chapters> page = new Page<Chapters>(pageNo, pageSize);
        QueryWrapper<Chapters> queryWrapper = new QueryWrapper<Chapters>();
        if(!ObjectUtils.isEmpty(chapters.getTutorialsName())) {
            queryWrapper = queryWrapper.like("tutorials_name",chapters.getTutorialsName());
        }
        if(!ObjectUtils.isEmpty(chapters.getDeleteStatus())) {
            queryWrapper = queryWrapper.like("delete_status",chapters.getDeleteStatus());
        }
        if(!ObjectUtils.isEmpty(chapters.getDeleteTime())) {
            queryWrapper = queryWrapper.like("delete_time",chapters.getDeleteTime());
        }
        //原来是chaptersService.page（），直接分页，现再加上对应的新添属性
        IPage<Chapters> pageInfo = chaptersService.pageChaptersAndCover(page, queryWrapper);
        model.addAttribute("deleteTimeSpace", deleteTimeSpace);
        model.addAttribute("searchInfo", chapters);
        model.addAttribute("pageInfo", new PageInfo(pageInfo));
        return prefix+"list";
    }

3.service层

传参不变，就是在records加上对应的属性

/**
     * 回显
     * @param page
     * @param queryWrapper
     * @return
     */
    IPage<Chapters> pageChaptersAndCover(Page<Chapters> page, QueryWrapper<Chapters> queryWrapper);

4.ServiceImpl

@Override
    public IPage<Chapters> pageChaptersAndCover(Page<Chapters> pageParam, QueryWrapper<Chapters> queryWrapper) {
        IPage<Chapters> page = page(pageParam, queryWrapper);
        //获取到记录，就是原有属性的实体类的list，
        //此时新添的属性为空，要set进去
        List<Chapters> recordList = page.getRecords();
        //找到新增属性的源头类，形成列表
        List<ChapterRelation> chapterRelationList =
                chapterRelationService.list();

        // 将list 转化为map来使用
        //ChapterId对应Weight
        Map<Long, Integer> weightMap =
                chapterRelationList
                .stream()
                .collect(Collectors
                .toMap(ChapterRelation::getChapterId,
                        ChapterRelation::getWeight));
       //再循环set入原有记录list                 
        for (Chapters chapters : recordList) {
        //原实体类的id就是map的key，查出要的weight，set进records记录里
            chapters.setWeight(weightMap.get(chapters.getId()));
        }
        return page;
    }