利用Solr实现电子商城检索功能

利用Solr实现电子商城检索功能

Solr

Solr是一个独立的企业级搜索应用服务器，它对外提供类似于Web-service的API接口。用户可以通过http请求，向搜索引擎服务器提交一定格式的XML文件，生成索引；也可以通过Http Get操作提出查找请求，并得到XML格式的返回结果。

Solr实现全文检索的流程

• 索引流程：solr客户端（浏览器、java程序）可以向solr服务端发送POST请求，请求内容是包含Field等信息的xml
• 搜索流程：solr客户端（浏览器、java程序）可以向solr服务端发送GET请求，solr服务器返回一个xml文档。
• Solr同样没有视图渲染的功能。

Solr索引搜索过程

1. 用户输入搜索条件
2. 对搜索条件进行分词处理（词条化、语言分析）
3. 根据分词的结果查找索引
4. 根据索引找到文档ID列表
5. 根据文档ID列表找到具体的文档，根据出现的频次等计算权重（权重越大，结果越接近），最后将文档列表按照权重排序返回

Spring+Solr实现电子商城检索功能

Web.xml配置文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns="http://xmlns.jcp.org/xml/ns/javaee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd"version="4.0"><welcome-file-list><welcome-file>product_list.jsp</welcome-file></welcome-file-list><!-- SpringMVC配置 --><servlet><servlet-name>springmvc</servlet-name><servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class><init-param><param-name>contextConfigLocation</param-name><param-value>/WEB-INF/applicationContext.xml</param-value></init-param></servlet><servlet-mapping><servlet-name>springmvc</servlet-name><url-pattern>*.action</url-pattern></servlet-mapping><filter><filter-name>Character Encoding</filter-name><filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class><init-param><param-name>encoding</param-name><param-value>UTF-8</param-value></init-param></filter><filter-mapping><filter-name>Character Encoding</filter-name><url-pattern>/*</url-pattern></filter-mapping>
</web-app>

Spring 配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xmlns:context="http://www.springframework.org/schema/context"xmlns:mvc="http://www.springframework.org/schema/mvc"xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsdhttp://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-4.3.xsdhttp://www.springframework.org/schema/mvchttp://www.springframework.org/schema/mvc/spring-mvc-4.3.xsdhttp://www.springframework.org/schema/contexthttp://www.springframework.org/schema/context/spring-context-4.3.xsd"><!-- 配置扫描包 --><context:component-scan base-package="com.itheima" /><!-- 配置注解驱动 --><mvc:annotation-driven /><!-- jsp视图解析器 --><beanclass="org.springframework.web.servlet.view.InternalResourceViewResolver"><!-- 前缀 --><property name="prefix" value="/WEB-INF/jsp/"></property><!-- 后缀 --><property name="suffix" value=".jsp"></property></bean><!-- 配置HttpSolrServer --><bean class="org.apache.solr.client.solrj.impl.HttpSolrServer"><constructor-arg value="http://localhost:8080/solr/"></constructor-arg></bean></beans>

这是JDong项目的Contrller层

@Controller
public class ProductController {@Autowiredprivate ProductService service;@RequestMapping("/list")public String list(String queryString, String catalog_name, String price,String sort, Integer page, Model model) throws Exception {System.out.println("访问了list");ResultModel rm = service.getProducts(queryString, catalog_name, price,sort, page);// 将查询结果放到request域model.addAttribute("result", rm);// 简单类型的数据回显model.addAttribute("queryString", queryString);model.addAttribute("catalog_name", catalog_name);model.addAttribute("price", price);model.addAttribute("sort", sort);model.addAttribute("page", page);return "product_list";}}

服务层部分

@Service
public class ProductServiceImpl implements ProductService {// 依赖注入HttpSolrServer@Autowiredprivate HttpSolrServer server;@Overridepublic ResultModel getProducts(String queryString, String catalogName,String price, String sort, Integer page) throws Exception {// 创建SolrQuery对象SolrQuery query = new SolrQuery();// 输入关键字if (StringUtils.isNotEmpty(queryString)) {query.setQuery(queryString);} else {query.setQuery("*:*");}// 输入商品分类过滤条件if (StringUtils.isNotEmpty(catalogName)) {query.addFilterQuery("product_catalog_name:" + catalogName);}// 输入价格区间过滤条件// price的值：0-9 10-19if (StringUtils.isNotEmpty(price)) {String[] ss = price.split("-");if (ss.length == 2) {query.addFilterQuery("product_price:[" + ss[0] + " TO " + ss[1]+ "]");}}// 设置排序if ("1".equals(sort)) {query.setSort("product_price", ORDER.desc);} else {query.setSort("product_price", ORDER.asc);}// 设置分页信息if (page == null)page = 1;query.setStart((page - 1) * 20);query.setRows(20);// 设置默认域query.set("df", "product_keywords");// 设置高亮信息query.setHighlight(true);query.addHighlightField("product_name");query.setHighlightSimplePre("<font style=\"color:red\" >");query.setHighlightSimplePost("</font>");QueryResponse response = server.query(query);// 查询出的结果SolrDocumentList results = response.getResults();// 记录总数long count = results.getNumFound();List<Products> products = new ArrayList<>();Products prod;// 获取高亮信息Map<String, Map<String, List<String>>> highlighting = response.getHighlighting();for (SolrDocument doc : results) {prod = new Products();// 商品IDprod.setPid(doc.get("id").toString());List<String> list = highlighting.get(doc.get("id")).get("product_name");// 商品名称if (list != null)prod.setName(list.get(0));else {prod.setName(doc.get("product_name").toString());}// 商品价格prod.setPrice(Float.parseFloat(doc.get("product_price").toString()));// 商品图片地址prod.setPicture(doc.get("product_picture").toString());products.add(prod);}// 封装ResultModel对象ResultModel rm = new ResultModel();rm.setProductList(products);rm.setCurPage(page);rm.setRecordCount(count);int pageCount = (int) (count / 20);if (count % 20 > 0)pageCount++;// 设置总页数rm.setPageCount(pageCount);return rm;}
}

POJO类

public class Products {// 商品编号private String pid;// 商品名称private String name;// 商品分类名称private String catalog_name;// 价格private float price;// 商品描述private String description;// 图片名称private String picture;public String getPid() {return pid;}public void setPid(String pid) {this.pid = pid;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getCatalog_name() {return catalog_name;}public void setCatalog_name(String catalog_name) {this.catalog_name = catalog_name;}public float getPrice() {return price;}public void setPrice(float price) {this.price = price;}public String getDescription() {return description;}public void setDescription(String description) {this.description = description;}public String getPicture() {return picture;}public void setPicture(String picture) {this.picture = picture;}}

响应封装类

public class ResultModel {// 商品列表private List<Products> productList;// 商品总数private Long recordCount;// 总页数private int pageCount;// 当前页private int curPage;public List<Products> getProductList() {return productList;}public void setProductList(List<Products> productList) {this.productList = productList;}public Long getRecordCount() {return recordCount;}public void setRecordCount(Long recordCount) {this.recordCount = recordCount;}public int getPageCount() {return pageCount;}public void setPageCount(int pageCount) {this.pageCount = pageCount;}public int getCurPage() {return curPage;}public void setCurPage(int curPage) {this.curPage = curPage;}}

实现效果