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编写补齐关键字功能

 电商网站的搜索框都会提供根据前缀补齐关键字的功能，接下来我们编写这一功能。

1、编写搜索服务接口实现类 

// 自动补齐
@Override
public List autoSuggest(String
keyword) {// 1.创建补全条件SuggestBuilder suggestBuilder = new SuggestBuilder();SuggestionBuilder suggestionBuilder = SuggestBuilders.completionSuggestion("tags").prefix(keyword).skipDuplicates(true).size(10);suggestBuilder.addSuggestion("prefix_suggestion", suggestionBuilder);// 2.发送请求SearchResponse response = template.suggest(suggestBuilder,IndexCoordinates.of("goods"));// 3.处理结果List result = response.getSuggest().getSuggestion("prefix_suggestion").getEntries().get(0).getOptions().stream().map(Suggest.Suggestion.Entry.Option::getText).map(Text::toString).collect(Collectors.toList());return result;
}

2、编写搜索控制器

/**
* 用户商品搜索
*/
@RestController
@RequestMapping("/goodsSearch")
public class GoodsSearchController {@DubboReferenceprivate GoodsESService goodsESService;/*** 自动补齐关键字* @param keyword 被补齐的词* @return 补齐的关联词集合*/@GetMapping("/autoSuggest")public BaseResult> autoSuggest(String keyword){List keywords = goodsESService.autoSuggest(keyword);return BaseResult.ok(keywords);}
}

3、测试接口

编写商品搜索功能

搜索功能的编写比较复杂，首先搜索条件繁多，有关键字、价格、 品牌、规格等。其次返回的结果除了搜索到的商品，还要返回搜索面板，包含关键字对应的品牌、品类、规格等，还要将搜索条件回 显回去，供前端操作。接下来我们编写商品的搜索功能。

1、重写搜索产品功能 

// 搜索产品
@Override
public GoodsSearchResult search(GoodsSearchParam goodsSearchParam)
{// 1.构造ES搜索条件// 2.搜索// 3.将查询结果封装为Page对象// 4.封装结果对象// 4.1 查询结果// 4.2 查询查询参数// 4.3 查询面板return null;
}

2、编写构造ES搜索条件功能

/*** 构造搜索条件* @param goodsSearchParam 查询条件对象* @return 搜索条件对象*/public NativeSearchQuery buildQuery(GoodsSearchParam goodsSearchParam){// 1.创建复杂查询条件对象BoolQueryBuilder builder = QueryBuilders.boolQuery();// 2.如果查询条件有关键词，关键词可以匹配商品名、副标题、品牌字段；否则查询所有商品if(!StringUtils.hasText(goodsSearchParam.getKeyword())){MatchAllQueryBuilder matchAllQueryBuilder = QueryBuilders.matchAllQuery();builder.must(matchAllQueryBuilder);}else {String keyword = goodsSearchParam.getKeyword();MultiMatchQueryBuilder multiMatchQueryBuilder = QueryBuilders.multiMatchQuery(keyword,"goodsName", "caption", "brand");builder.must(multiMatchQueryBuilder);}// 3.如果查询条件有品牌，则精准匹配品牌String brand = goodsSearchParam.getBrand();if (StringUtils.hasText(brand)){TermQueryBuilder termQueryBuilder = QueryBuilders.termQuery("brand", brand);builder.must(termQueryBuilder);}// 4.如果查询条件有价格，则匹配价格Double highPrice = goodsSearchParam.getHighPrice();Double lowPrice = goodsSearchParam.getLowPrice();if (highPrice != null && highPrice != 0){RangeQueryBuilder lte = QueryBuilders.rangeQuery("price").lte(highPrice);builder.must(lte);}if (lowPrice != null && lowPrice != 0){RangeQueryBuilder gte = QueryBuilders.rangeQuery("price").gte(lowPrice);builder.must(gte);}// 5.如果查询条件有规格项，则精准匹配规格项Map specificationOptions = goodsSearchParam.getSpecificationOption();if (specificationOptions != null && specificationOptions.size() > 0){Set> entries = specificationOptions.entrySet();for (Map.Entry entry : entries) {String key = entry.getKey();String value = entry.getValue();if (StringUtils.hasText(key)){TermQueryBuilder termQuery = QueryBuilders.termQuery("specification." + key + ".keyword", value);builder.must(termQuery);}}}// 6.添加分页条件PageRequest pageable = PageRequest.of(goodsSearchParam.getPage() - 1, goodsSearchParam.getSize());// 查询构造器，添加条件和分页NativeSearchQueryBuilder nativeSearchQueryBuilder = new NativeSearchQueryBuilder();nativeSearchQueryBuilder.withQuery(builder).withPageable(pageable);// 7.如果查询条件有排序，则添加排序条件String sortFiled = goodsSearchParam.getSortFiled();String sort = goodsSearchParam.getSort();SortBuilder sortBuilder = null;if (StringUtils.hasText(sort) && StringUtils.hasText(sortFiled)){// 新品的正序是id的倒序if (sortFiled.equals("NEW")){sortBuilder = SortBuilders.fieldSort("id");if (sort.equals("ASC")){sortBuilder.order(SortOrder.DESC);}if (sort.equals("DESC")){sortBuilder.order(SortOrder.ASC);}}if (sortFiled.equals("PRICE")){sortBuilder = SortBuilders.fieldSort("price");if (sort.equals("ASC")){sortBuilder.order(SortOrder.ASC);}if (sort.equals("DESC")){sortBuilder.order(SortOrder.DESC);}}nativeSearchQueryBuilder.withSorts(sortBuilder);}// 8.返回查询条件对象NativeSearchQuery query = nativeSearchQueryBuilder.build();return query;
}

3、重写搜索产品功能

@Override
public GoodsSearchResult
search(GoodsSearchParam goodsSearchParam)
{// 1.构造ES搜索条件NativeSearchQuery query = buildQuery(goodsSearchParam);// 2.搜索SearchHits search = template.search(query, GoodsES.class);// 3.将查询结果封装为Page对象// 3.1 将SearchHits转为ListList content = new ArrayList();for (SearchHit goodsESSearchHit : search) {GoodsES goodsES = goodsESSearchHit.getContent();content.add(goodsES);}// 3.2 将List转为MP的Page对象Page page = new Page();page.setCurrent(goodsSearchParam.getPage()) // 当前页.setSize(goodsSearchParam.getSize()) // 每页条数.setTotal(search.getTotalHits())// 总条数.setRecords(content); // 结果集// 4.封装结果对象// 4.1 查询结果GoodsSearchResult result = new GoodsSearchResult();result.setGoodsPage(page);// 4.2 查询参数result.setGoodsSearchParam(goodsSearchParam);// 4.3 查询面板buildSearchPanel(goodsSearchParam,result);return result;
}

4 编写封装查询面板功能，查询面板中包含品牌、分类、规格项。 根据查询条件，查询出20条最符合的数据，遍历这些数据，找到它们的品牌、分类、规格项，最后封装到查询结果中。写法如 下：

/*** 封装查询面板，即根据查询条件，找到查询结果关联度前20名的商品进行封装* @param goodsSearchParam* @param goodsSearchResult*/
public void buildSearchPanel(GoodsSearchParam goodsSearchParam,GoodsSearchResult goodsSearchResult){// 1.构造搜索条件goodsSearchParam.setPage(1);goodsSearchParam.setSize(20);goodsSearchParam.setSort(null);goodsSearchParam.setSortFiled(null);NativeSearchQuery query = buildQuery(goodsSearchParam);// 2.搜索SearchHits search = template.search(query, GoodsES.class);// 3.将结果封装为List对象List content = new ArrayList();for (SearchHit goodsESSearchHit : search) {GoodsES goodsES = goodsESSearchHit.getContent();content.add(goodsES);}// 4.遍历集合，封装查询面板// 商品相关的品牌列表Set brands = new HashSet();// 商品相关的类型列表Set productTypes = new HashSet();// 商品相关的规格列表Map> specifications = new HashMap();for (GoodsES goodsES : content) {// 获取品牌brands.add(goodsES.getBrand());// 获取类型List productType = goodsES.getProductType();productTypes.addAll(productType);// 获取规格Map> specification = goodsES.getSpecification();Set>> entries = specification.entrySet();for (Map.Entry> entry : entries) {// 规格名String key = entry.getKey();// 规格值List value = entry.getValue();// 如果没有遍历出该规格，新增键值对，如果已经遍历出该规格，则向规格中添加规格项if(!specifications.containsKey(key)){specifications.put(key,new HashSet(value));}else{specifications.get(key).addAll(value);}}}goodsSearchResult.setBrands(brands);goodsSearchResult.setProductType(productTypes);goodsSearchResult.setSpecifications(specifications);
}

5、编写搜索控制器

/*** 搜索商品* @param goodsSearchParam 搜索条件* @return 搜索结果*/
@PostMapping("/search")
public BaseResult search(@RequestBody GoodsSearchParam
goodsSearchParam){GoodsSearchResult result = searchService.search(goodsSearchParam);return BaseResult.ok(result);
}

6、测试接口

编写根据id查询商品详情功能

用户查询到商品列表后，再查询商品详情需要从数据库查询，因为 ES中的数据不全。所以我们需要在商品服务中添加根据id查询商品详情功能：

1、在 GoodsMapper 中添加根据id查询商品详情方法

// 根据id查询商品详情
GoodsDesc findDesc(Long id);

2、编写映射文件 GoodsMapper.xml

SELECTbz_goods.id bid,bz_goods.goodsName goodsName,bz_goods.caption caption,bz_goods.price price,bz_goods.headerPic headerPic,bz_goods.introduction introduction,bz_goods.isMarketable isMarketable,bz_goods.brandId brandId,bz_brand.`name` brandName,type1.id type1Id,type1.`name` type1Name,type1.`level` type1Level,type1.parentId type1ParentId,type2.id type2Id,type2.`name` type2Name,type2.`level` type2Level,type2.parentId type2ParentId,type3.id type3Id,type3.`name` type3Name,type3.`level` type3Level,type3.parentId type3ParentId,bz_goods_image.id imageId,bz_goods_image.imageTitle imageTitle,bz_goods_image.imageUrl imageUrl,bz_specification.id specificationId,bz_specification.specName specName,bz_specification.productTypeId
productTypeId,bz_specification_option.id optionId,bz_specification_option.optionName
optionNameFROMbz_goods,bz_goods_image,bz_brand,bz_specification,bz_specification_option,bz_goods_specification_option,bz_product_type AS type1,bz_product_type AS type2,bz_product_type AS type3WHERE bz_goods.id =
bz_goods_specification_option.gidAND
bz_goods_specification_option.optionId =
bz_specification_option.idAND bz_specification.id =
bz_specification_option.specIdAND bz_goods.brandId = bz_brand.idAND bz_goods.id =
bz_goods_image.goodsIdAND bz_goods.productType1Id = type1.idAND bz_goods.productType2Id = type2.idAND bz_goods.productType3Id = type3.idAND bz_goods.id = #{id}

3、编写商品服务接口和商品服务接口实现类

public interface GoodsService {// 查询商品详情GoodsDesc findDesc(Long id);
}

public class GoodsServiceImpl implements GoodsService {@Overridepublic GoodsDesc findDesc(Long id) {return goodsMapper.findDesc(id);}
}

4、编写搜索控制器

/**
* 用户商品搜索
*/
@RestController
@RequestMapping("/user/goodsSearch")
public class GoodsSearchController {@DubboReferenceprivate GoodsESService goodsESService;@DubboReferenceprivate GoodsService goodsService;/*** 根据id查询商品详情* @param id 商品id* @return 商品详情*/@GetMapping("/findDesc")public BaseResult findDesc(Long id) {GoodsDesc goodsDesc = goodsService.findDesc(id);return BaseResult.ok(goodsDesc);}
}

5、测试接口

管理员操作商品后同步到ES中

管理员在数据库增删改商品后，需要将商品数据同步到ES中，这样用户才能在第一时间搜索到最新数据。写法如下：

编写删除ES商品方法

在搜索接口实现类编写删除ES商品方法，商品下架后调用该方法

// 删除ES中的商品
@Override
public void delete(Long id) {goodsESRepository.deleteById(id);
}

修改商品服务接口实现类

@DubboService
public class GoodsServiceImpl implements
GoodsService {@Autowiredprivate GoodsMapper goodsMapper;@Autowiredprivate GoodsImageMapper goodsImageMapper;@DubboReferenceprivate SearchService searchService;@Overridepublic void add(Goods goods) {// 插入商品数据goodsMapper.insert(goods);// 插入图片数据Long goodsId = goods.getId(); // 获取商品主键List images = goods.getImages(); // 商品图片for (GoodsImage image : images) {image.setGoodsId(goodsId); // 给图片设置商品idgoodsImageMapper.insert(image); //插入图片}// 插入商品_规格项数据// 1.获取规格List specifications = goods.getSpecifications();// 2.获取规格项List options = new ArrayList(); //规格项集合// 遍历规格，获取规格中的所有规格项for (Specification specification : specifications) {options.addAll(specification.getSpecificationOptions());}// 3.遍历规格项，插入商品_规格项数据for (SpecificationOption option : options) {goodsMapper.addGoodsSpecificationOption(goodsId,option.getId());}// 将商品数据同步到es中GoodsDesc goodsDesc = findDesc(goodsId);searchService.syncGoodsToES(goodsDesc);}@Overridepublic void update(Goods goods) {// 删除旧图片数据Long goodsId = goods.getId(); // 商品idQueryWrapper  queryWrapper = new QueryWrapper();queryWrapper.eq("goodsId",goodsId);goodsImageMapper.delete(queryWrapper);// 删除旧规格项数据goodsMapper.deleteGoodsSpecificationOption(goodsId);// 插入商品数据goodsMapper.updateById(goods);// 插入图片数据List images = goods.getImages(); // 商品图片for (GoodsImage image : images) {image.setGoodsId(goodsId); // 给图片设置商品idgoodsImageMapper.insert(image); //插入图片}// 插入商品_规格项数据// 1.获取规格List specifications = goods.getSpecifications();// 2.获取规格项List options = new ArrayList(); //规格项集合// 遍历规格，获取规格中的所有规格项for (Specification specification : specifications) {options.addAll(specification.getSpecificationOptions());}// 3.遍历规格项，插入商品_规格项数据for (SpecificationOption option : options) {goodsMapper.addGoodsSpecificationOption(goodsId,option.getId());}// 将商品数据同步到es中GoodsDesc goodsDesc = findDesc(goodsId);searchService.syncGoodsToES(goodsDesc);}@Overridepublic void putAway(Long id, Boolean isMarketable) {goodsMapper.putAway(id,isMarketable);// 上架时数据同步到ES，下架时删除ES数据if (isMarketable){GoodsDesc goodsDesc = findDesc(id);searchService.syncGoodsToES(goodsDesc);}else {searchService.delete(id);}}
}

在商品同步到ES的功能中，商品服务使用Dubbo调用了搜索服务，这种方式有以下两个问题：

1、服务间耦合严重，即商品服务的启动必须依赖搜索服务。

2 、运行效率低，在管理员增删改商品后调用搜索服务会等待同步结果，比较浪费时间。 

此时我们可以使用消息队列解决这一问题。即管理员增删改商 品后，向消息队列发送消息，搜索服务监听消息，搜索服务拿 到消息后同步数据即可。这样既能优化管理员体验，也可以减少服务间的依赖。 

安装Erlang 

RabbitMQ是使用Erlang语言编写的，所以在安装RabbitMQ前需要先安装Erlang环境

1、安装Erlang所需的依赖

yum install -y epel-release

2、添加存储库条目

get https://packages.erlangsolutions.com/erlang-solutions-1.0-1.noarch.rpmrpm -Uvh erlang-solutions-1.0-1.noarch.rpm

3、安装Erlang

yum install erlang-24.2.1

4、查看Erlang是否安装成功

erl -version

安装RabbitMQ

1、RabbitMQ是通过主机名进行访问的，必须给虚拟机添加主机名

# 修改文件
vim /etc/sysconfig/network# 添加如下内容NETWORKING=yesHOSTNAME=itbaizhan# 修改文件
vim /etc/hosts# 添加如下内容服务器ip itbaizhan

 2、使用rz命令上传RabbitMQ压缩文件

3、安装RabbitMQ

# 解压RabbitMQ
tar xf rabbitmq-server-generic-unix-3.9.13.tar.xz
# 重命名：
mv rabbitmq_server-3.9.13 rabbitmq
# 移动文件夹：
mv rabbitmq /usr/local/

4、配置环境变量

# 编辑/etc/profile文件
vim /etc/profile#添加如下内容
export PATH=$PATH:/usr/local/rabbitmq/sbin# 运行文件，让修改内容生效
source /etc/profile

5、配置允许使用guest远程访问

# 创建配置文件夹
mkdir -p /usr/local/rabbitmq/etc/rabbitmq# 创建配置文件
vim /usr/local/rabbitmq/etc/rabbitmq/rabbitmq.conf# 添加如下内容
loopback_users=none

6、开启管控台插件

rabbitmq-plugins enable
rabbitmq_management

7、后台运行

#启动rabbitmq
rabbitmq-server -detached#停止rabbitmq
rabbitmqctl stop

8、通过管控台访问RabbitMQ

路径： http://ip地址:15672 ，用户名： guest ，密码： guest

修改商品服务 

1、添加RabbitMQ起步依赖

org.springframework.bootspring-boot-starter-amqp

2、添加RabbitMQ相关配置

spring:# 数据源datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql:///baizhanshopping?serverTimezone=UTCusername: rootpassword01: 123456# rabbitmqrabbitmq:host: 192.168.100.131port: 5672username: guestpassword: guestvirtual-host: /

3、编写配置文件，创建交换机和队列

@Configuration
public class RabbitConfig {// 交换机private final String GOODS_EXCHANGE = "goods_exchange";// 同步商品数据队列private final String SYNC_GOODS_QUEUE = "sync_goods_queue";// 删除商品数据队列private final String DEL_GOODS_QUEUE = "del_goods_queue";// 创建交换机@Bean(GOODS_EXCHANGE)public Exchange getExchange() {return ExchangeBuilder.topicExchange(GOODS_EXCHANGE) // 交换机类型.durable(true) // 是否持久化.build();}// 创建队列@Bean(SYNC_GOODS_QUEUE)public Queue getQueue1() {return new Queue(SYNC_GOODS_QUEUE); // 队列名}@Bean(DEL_GOODS_QUEUE)public Queue getQueue2() {return new Queue(DEL_GOODS_QUEUE); // 队列名}// 交换机绑定队列@Beanpublic Binding bindQueue1(@Qualifier(GOODS_EXCHANGE) Exchange exchange,@Qualifier(SYNC_GOODS_QUEUE) Queue queue){return BindingBuilder.bind(queue).to(exchange).with("#.sync_goods.#").noargs();}@Beanpublic Binding bindQueue2(@Qualifier(GOODS_EXCHANGE) Exchange exchange,@Qualifier(DEL_GOODS_QUEUE) Queue queue){return BindingBuilder.bind(queue).to(exchange).with("#.del_goods.#").noargs();}
}

4、修改商品服务实现类，增删改商品后发送消息

@DubboService
public class GoodsServiceImpl implements
GoodsService {@Autowiredprivate GoodsMapper goodsMapper;@Autowiredprivate GoodsImageMapper goodsImageMapper;@Autowiredprivate RabbitTemplate rabbitTemplate;@Overridepublic void add(Goods goods) {// 插入商品数据goodsMapper.insert(goods);// 插入图片数据Long goodsId = goods.getId(); // 获取商品主键List images = goods.getImages(); // 商品图片for (GoodsImage image : images) {image.setGoodsId(goodsId); //给图片设置商品idgoodsImageMapper.insert(image); // 插入图片}// 插入商品_规格项数据List specifications = goods.getSpecifications(); // 获取规格List options = new ArrayList(); // 规格项集合// 遍历规格，获取规格中的所有规格项for (Specification specification : specifications) {options.addAll(specification.getSpecificationOptions());}// 遍历规格项，插入商品_规格项数据for (SpecificationOption option : options) {goodsMapper.addGoodsSpecificationOption(goodsId,option.getId());}// 将商品数据同步到ES中rabbitTemplate.convertAndSend("goods_exchange","sync_goods",findById(goodsId));}@Overridepublic void update(Goods goods) {// 删除旧图片数据Long goodsId = goods.getId(); //商品idQueryWrapper queryWrapper = new QueryWrapper();queryWrapper.eq("goodsId",goodsId);goodsImageMapper.delete(queryWrapper);// 删除旧规格项数据goodsMapper.deleteGoodsSpecificationOption(goodsId);// 插入商品数据goodsMapper.updateById(goods);// 插入图片数据List images = goods.getImages(); // 商品图片for (GoodsImage image : images) {image.setGoodsId(goodsId); //给图片设置商品idgoodsImageMapper.insert(image); // 插入图片}// 插入商品_规格项数据List specifications = goods.getSpecifications(); // 获取规格List options = new ArrayList(); // 规格项集合// 遍历规格，获取规格中的所有规格项for (Specification specification : specifications) {options.addAll(specification.getSpecificationOptions());}// 遍历规格项，插入商品_规格项数据for (SpecificationOption option : options) {goodsMapper.addGoodsSpecificationOption(goodsId,option.getId());}// 将商品数据同步到ES中rabbitTemplate.convertAndSend("goods_exchange","sync_goods",findById(goodsId));}@Overridepublic GoodsDesc findById(Long id) {return goodsMapper.findById(id);}@Overridepublic List findAll() {return goodsMapper.findAll();}@Overridepublic void putAway(Long id, Boolean isMarketable) {goodsMapper.putAway(id,isMarketable);if (isMarketable){// 上架时同步到ESrabbitTemplate.convertAndSend("goods_exchange","sync_goods",findById(id));}else{// 下架删除ES数据rabbitTemplate.convertAndSend("goods_exchange","del_goods",id);}}
}

 修改搜索服务

1、添加RabbitMQ起步依赖

org.springframework.bootspring-boot-starter-amqp

2 、添加RabbitMQ相关配置

spring:# 数据源datasource:driver-class-name: com.mysql.cj.jdbc.Driverurl: jdbc:mysql:///baizhanshopping?serverTimezone=UTCusername: rootpassword01: 123456# elasticsearchelasticsearch:uris: http://192.168.100.131:9200# rabbitmqrabbitmq:host: 192.168.100.131port: 5672username: guestpassword: guestvirtual-host: /

3、修改搜索服务实现类，监听队列，处理消息

@DubboService
@Service
public class GoodsESServiceImpl implements GoodsESService {// 监听同步商品队列@RabbitListener(queues = "sync_goods_queue")public void listenSyncQueue(GoodsDesc goodsDesc){syncGoodsToES(goodsDesc);}// 监听删除商品队列@RabbitListener(queues = "del_goods_queue")public void listenDelQueue(Long id){delete(id);}
}