• solr8.0 springboot整合solr(四)


    引言:

      solr搭建起后,就该应用到java后台开发里了,接下来就用springboot整合应用solr

    一:引入jar包

      

    <!--solr-->
            <dependency>
                <groupId>org.springframework.data</groupId>
                <artifactId>spring-data-solr</artifactId>
                <version>4.0.6.RELEASE</version>
            </dependency>
    
            <!--操作solr的工具-->
            <dependency>
                <groupId>org.apache.solr</groupId>
                <artifactId>solr-solrj</artifactId>
                <version>8.0.0</version>
            </dependency>

    二:对application配置文件进行配置(mycore1是我创建的核心,具体名字改为你所创建的核心)

    spring:
      data:
        solr:
          host: http://127.0.0.1:8983/solr/mycore1

    三:接下来就是代码操作了(详细解释看注解),这个只是我的服务层

    @Service
    public class SearchService {
    
        @Autowired
        private SolrClient solrClient;
    //search就是搜索的内容,currentpage是因为我做了分页,如果没做分页可忽略此参数
        public PageResult searchNews(String search,int currentPage) throws IOException, SolrServerException {
    //        创建solr查询对象
            SolrQuery query = new SolrQuery();
            if(null != search && !"".equals(search)){
    //            设置查询关键词
                query.setQuery(search);
    //            设置默认查询域
                query.set("df", "news_keywords");
            }
    //        高亮显示
            query.setHighlight(true);
    //        设置高亮显示字段
            query.addHighlightField("newsTitle,newsAbstract");
            query.setHighlightSimplePre("<span style='color:red'>");
            query.setHighlightSimplePost("</span>");
    //        设置排序规则
            query.setSort("newsTime",SolrQuery.ORDER.desc);
    //        设置返回格式
            query.set("wt","json");
    //        设置分页
            query.set("start", (currentPage - 1) * 10);
            query.set("rows", 10);
    //        进行查询得到返回结果
            QueryResponse queryResponse = solrClient.query(query);
    //        取出高亮部分
            Map<String, Map<String, List<String>>> highlighting = queryResponse.getHighlighting();
    //        得到主体数据部分
            SolrDocumentList results = queryResponse.getResults();
    
            ArrayList<NewsWithBLOBs> newsList = new ArrayList<>();
    //        对主体数据进行遍历,将数据依次保存到news对象中,然后将news对象加入list集合就是查询到的所有新闻
            for (SolrDocument result : results){
                NewsWithBLOBs news = new NewsWithBLOBs();
                news.setNewsId(result.get("id").toString());
                news.setNewsCover(result.get("newsCover").toString());
                news.setNewsTime((Date) result.get("newsTime"));
                news.setNewsBrowse((Integer) result.get("newsBrowse"));
                news.setNewsSchoolid(result.get("newsSchoolid").toString());
                news.setNewsCategoryid(result.get("newsCategoryid").toString());
                news.setNewsAbstract(result.get("newsAbstract").toString());
                news.setNewsContent(result.get("newsContent").toString());
    //            设置高亮部分,下边是得到指定新闻id的高亮部分,并且将高亮部分设置进入对象中
                Map<String, List<String>> map = highlighting.get(result.get("id"));
                List<String> list = map.get("newsAbstract");
                if(null != list && list.size() > 0){
                    String newsAbstract = list.get(0);
                    news.setNewsAbstract(newsAbstract);
                }
                List<String> list1 = map.get("newsTitle");
                if(null != list1 && list1.size() > 0){
                    String newsTitle = list1.get(0);
                    news.setNewsTitle(newsTitle);
                }
                newsList.add(news);
             }
    
    //        得到所获得的新闻条数
            long numFound = results.getNumFound();
    //        下边是我自己的分页封装,可忽略,上边的到的newslist就是获得的所有新闻
            PageResult result = new PageResult();
            result.setRecordCount(numFound);
            System.out.println(numFound);
            result.setTotalPages((int) (numFound%10 == 0 ? numFound/10 : numFound/10+1));
            result.setList(newsList);
            return result;
        }
    }
    

      

    通过上边就能获取到指定的查询对象了,并且高亮显示也正常

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  • 原文地址:https://www.cnblogs.com/ITDreamer/p/10740192.html
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