mybatis-plus的增删改查crud

注意引入mybatis-plus和mybatis-plus分页插件

    @Resource
    private BannerDao bannerDao;
	//分页查询所有数据
    @GetMapping(value = "/selectPage")
    public Result<IPage<BannerPojo>> selectPage(
            @RequestParam(value = "pageNum", required = false, defaultValue = "1") Integer pageNum,
            @RequestParam(value = "pageSize", required = false, defaultValue = "10") Integer pageSize) {
        return Result.succeed(bannerDao.selectPage(new Page<>(pageNum, pageSize), new QueryWrapper<>()));
    }
    //新增
    @PostMapping(value = "addSave")
    public Result<Integer> addSave(@RequestBody BannerPojo bannerPojo) {
        return Result.succeed(bannerDao.insert(bannerPojo));
    }
    //修改
    @PostMapping(value = "update")
    public Result<Integer> update(@RequestBody BannerPojo bannerPojo) {
        return Result.succeed(bannerDao.updateById(bannerPojo));
    }
    //删除
    @PostMapping(value = "delete")
    public Result<Integer> delete(@RequestParam String id) {
        return Result.succeed(bannerDao.deleteById(id));
    }