✅P192_商城业务-检索服务-条件筛选联动

页面效果

在未进行条件筛选时，商品属性值位于侧边栏一侧，进行部分条件筛选后，属性值位移到面包屑上

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面包屑vo设置一个默认值

cfmall-search/com.gyz.cfmall.search.vo.SearchResult

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调用product服务查询品牌名称

编写Feign接口

@FeignClient("cfmall-product")
public interface ProductFeignService {

	//省略代码...
    @GetMapping("/product/brand/info/ids")
    R brandsInfo(@RequestParam("brandIds") List<Long> brandIds);
}

Controller

cfmall-search/com.gyz.cfmall.product.controller.BrandController

/**
 * 通过品牌id查询
 */
@RequestMapping("/info/ids")
public R brandinfoByIds(@RequestParam("brandIds") List<Long> brandIds) {
    List<BrandEntity> brandInfoList = brandService.queryBrandInfoByids(brandIds);
    return R.ok().put("brand", brandInfoList);
}

Service

cfmall-search/com.gyz.cfmall.product.service.BrandService

public interface BrandService extends IService<BrandEntity> {

	//省略代码...

    List<BrandEntity> queryBrandInfoByids(List<Long> brandIds);
}

cfmall-search/com.gyz.cfmall.product.service.impl.BrandServiceImpl#queryBrandInfoByids

@Override
public List<BrandEntity> queryBrandInfoByids(List<Long> brandIds) {
    return this.baseMapper.selectList(new QueryWrapper<BrandEntity>().in("brand_id",brandIds));
}

远程服务调用，查询很费时，可以将查询的结果保存进缓存中 ，在方法上加@Cacheable注解实现，

cfmall-search/com.gyz.cfmall.product.service.impl.AttrServiceImpl#getAttrInfo

//value：分区名,key：用于标识第几号属性
@Cacheable(value = "attr", key = "'attrinfo:'+#root.args[0]")
@Override
public AttrRespVo getAttrInfo(Long attrId) {...}

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抽取替换url方法

选中要抽取的逻辑，IDE快捷键：Ctrl+Alt+M，抽取为：replaceQueryString()方法

cfmall-search/com.gyz.cfmall.search.service.impl.MallSearchServiceImpl#replaceQueryString

/**
 * url替换
 *
 * @param param
 * @param value
 * @return
 */
private String replaceQueryString(SearchParam param, String value, String key) {
    //封装链接
    String encode = null;
    try {
        encode = URLEncoder.encode(value, "UTF-8");
        //浏览器对空格的编码和Java不一样，差异化处理
        encode = encode.replace("%28","(").replace("%29",")").replace("+","%20");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
    }
    String replace = param.get_queryString().replace("&" + key + "=" + encode, "");
    return replace;
}

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编写面包屑导航栏功能

cfmall-search/com.gyz.cfmall.search.service.impl.MallSearchServiceImpl#buildSearchResult

private SearchResult buildSearchResult(SearchResponse response, SearchParam param) {
//省略其它代码...

//7、品牌面包屑导航
if (param.getBrandId() != null && param.getBrandId().size() > 0) {
    List<SearchResult.NavVo> navs = result.getNavs();
    SearchResult.NavVo navVo = new SearchResult.NavVo();
    //封装属性名
    navVo.setNavName("品牌");
    R r = productFeignService.brandsInfo(param.getBrandId());
    if (r.getCode() == 0) {
        List<BrandEntity> brandList = r.getData("brand", new TypeReference<List<BrandEntity>>() {
        });
        StringBuffer stringBuffer = new StringBuffer();
        String replace = "";

        for (BrandEntity brand : brandList) {
            stringBuffer.append(brand.getName() + ";");
            replace = replaceQueryString(param, brand.getBrandId() + "", "brandId");
        }
        navVo.setNavValue(stringBuffer.toString());
        navVo.setLink("http://search.cfmall.com/list.html?" + replace);
    }
    navs.add(navVo);
    result.setNavs(navs);
 }  
}

品牌面包屑导航栏，品牌筛选剔除

cfmall-search/src/main/resources/templates/list.html

th:with="brandId=${param.brandId}"

th:if="${#strings.isEmpty(brandId)}"

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封装已经筛选的属性id

创建一个list用于封装已经筛选的属性id

**cfmall-search/src/main/java/com/gyz/cfmall/search/vo/SearchResult.java**

**cfmall-search/src/main/java/com/gyz/cfmall/search/service/impl/MallSearchServiceImpl.java**

cfmall-search/src/main/resources/templates/list.html