第二十三章第三节：商品sku基础查询功能

1、编写controller控制层

com.applesnt.onlinemall.product.controller.SkuInfoController

   @RequestMapping("/list")
    public R list(@RequestParam Map<String, Object> params){
        PageUtils page = skuInfoService.queryPageByCondition(params);

        return R.ok().put("page", page);
    }

2、编写接口

com.applesnt.onlinemall.product.service.SkuInfoService

 PageUtils queryPageByCondition(Map<String, Object> params);

3、编写接口实现

com.applesnt.onlinemall.product.service.impl.SkuInfoServiceImpl

    @Override
    public PageUtils queryPageByCondition(Map<String, Object> params) {

        QueryWrapper<SkuInfoEntity> queryWrapper = new QueryWrapper<>();
        String key = (String)params.get("key");
        if(!StringUtils.isEmpty(key)){
            queryWrapper.and((wrapper)->{
                wrapper.eq("sku_id",key).or().like("sku_name",key);
            });
        }

        String catelogId = (String)params.get("catelogId");
        if(!StringUtils.isEmpty(catelogId)&&!"0".equalsIgnoreCase(catelogId)){
            queryWrapper.eq("catalog_id",catelogId);
        }

        String brandId = (String)params.get("brandId");
        if(!StringUtils.isEmpty(brandId)&&!"0".equalsIgnoreCase(brandId)){
            queryWrapper.eq("brand_id",brandId);
        }

        String min = (String)params.get("min");
        if(!StringUtils.isEmpty(min)){
            queryWrapper.ge("price",min);
        }

        String max = (String)params.get("max");
        if(!StringUtils.isEmpty(max)){
            BigDecimal bigDecimal = new BigDecimal(max);
            if(bigDecimal.compareTo(new BigDecimal("0"))==1){
                queryWrapper.le("price",max);
            }
        }

        IPage<SkuInfoEntity> page = this.page(
                new Query<SkuInfoEntity>().getPage(params),
                queryWrapper
        );
        return new PageUtils(page);
    }