solr搜索

1. solr中关键对象，参数或配置文件

    关键字: solrHome，分词器

    配置文件: schema.xml:配置字段，字段类型

                    web.xml:配置solrHme的位置

    客户端: solrJ

    对象: solrServer,SolrQuery

  2. solr的维护:

        2.1 solr中中维护包括增，删，改，查，注意solr中没有修改

（1） 向solr 库中添加：
        public void addDocument() throws Exception {
		//创建一连接
		SolrServer solrServer = new    HttpSolrServer("http://192.168.254.130:8080/solr");
		//创建一个文档对象
		SolrInputDocument document = new SolrInputDocument();
		document.addField("id", "test001");
		document.addField("item_title", "测试商品2");
		document.addField("item_price", 54321);
		//把文档对象写入索引库
		solrServer.add(document);
		//提交
		solrServer.commit();
	}
     （2） 更新: 添加一个id值一样的，就将原来的更新了:
     public void addDocument() throws Exception {
		//创建一连接
		SolrServer solrServer = new        HttpSolrServer("http://192.168.254.130:8080/solr");
		//创建一个文档对象
		SolrInputDocument document = new SolrInputDocument();
		document.addField("id", "test001");
		document.addField("item_title", "测试商品3");
		document.addField("item_price", 1233333);
		//把文档对象写入索引库
		solrServer.add(document);
		//提交
		solrServer.commit();
	}

（3）删除: 
       public void deleteDocument() throws Exception {
		//创建一连接
		SolrServer solrServer = new HttpSolrServer("http://192.168.254.130:8080/solr");
		//solrServer.deleteById("test001");
		solrServer.deleteByQuery("*:*");
		solrServer.commit();
	}

（4）查询:

public void queryDocument() throws Exception {
		SolrServer solrServer = new HttpSolrServer("http://192.168.254.130:8080/solr");
		//创建一个查询对象
		SolrQuery query = new SolrQuery();
		//设置查询条件
		query.setQuery("*:*");
		query.setStart(20);
		query.setRows(50);
		//执行查询
		QueryResponse response = solrServer.query(query);
		//取查询结果
		SolrDocumentList solrDocumentList = response.getResults();
		System.out.println("共查询到记录：" + solrDocumentList.getNumFound());
		for (SolrDocument solrDocument : solrDocumentList) {
			System.out.println(solrDocument.get("id"));
			System.out.println(solrDocument.get("item_title"));
			System.out.println(solrDocument.get("item_price"));
			System.out.println(solrDocument.get("item_image"));
			
		}
	}

2.2 与spring的整合例子在: taotao-search中 ItemServiceImpl 

添加例子

@Service
public class ItemServiceImpl implements ItemService{
	@Resource
	private ItemMapper itemMapper;
	
	@Resource
	private SolrServer solrServer;
	

	@Override
	public TaotaoResult importAllItems() {
        //从数据库中查出商品列表
		List<Item> list = itemMapper.getItemList();
		//将list中的数据导入到 solr中
		try {
			for(Item item:list){
				//创建一个文档对象
				SolrInputDocument document = new SolrInputDocument();
				document.addField("id", item.getId());
				document.addField("item_title", item.getTitle());
				document.addField("item_sell_point", item.getSell_point());
				document.addField("item_price", item.getPrice());
				document.addField("item_image", item.getImage());
				document.addField("item_category_name", item.getCategory_name());
				//把文档对象写入索引库
				solrServer.add(document);
			}
			solrServer.commit();
			return TaotaoResult.ok();
		} catch (Exception e) {
			e.printStackTrace();
			return TaotaoResult.build(500, ExceptionUtil.getStackTrace(e));
		}
		
	}

}

查询例子:

package com.taotao.search.service.impl;

import javax.annotation.Resource;

import org.apache.solr.client.solrj.SolrQuery;
import org.springframework.stereotype.Service;

import com.taotao.search.dao.SearchDao;
import com.taotao.search.pojo.SearchResult;
import com.taotao.search.service.SearchService;

@Service
public class SearchServiceImpl implements SearchService {
	@Resource
	private SearchDao searchDao;

	@Override
	public SearchResult search(String queryString, int page, int rows) throws Exception {
		// 创建查询对象
		SolrQuery query = new SolrQuery();
		// 设置查询条件
		query.setQuery(queryString);
		// 设置分页
		query.setStart((page - 1) * rows);
		query.setRows(rows);
		// 设置默认搜素域
		query.set("df", "item_keywords");
		// 设置高亮显示
		query.setHighlight(true);
		query.addHighlightField("item_title");
		query.setHighlightSimplePre("<em style=\"color:red\">");
		query.setHighlightSimplePost("</em>");
		// 执行查询
		SearchResult searchResult = searchDao.search(query);
		// 计算查询结果总页数
		long recordCount = searchResult.getRecordCount();
		//算法:如果总行数不能被每页行数整除，则在显示页面上加1
		long pageCount = recordCount / rows;
		if (recordCount % rows > 0) {
			pageCount++;
		}
		searchResult.setPageCount(pageCount);
		searchResult.setCurPage(page);

		return searchResult;
	}

}

依赖的searchDao代码为：

package com.taotao.search.dao.impl;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.solr.client.solrj.SolrQuery;
import org.apache.solr.client.solrj.SolrServer;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocument;
import org.apache.solr.common.SolrDocumentList;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;

import com.taotao.search.dao.SearchDao;
import com.taotao.search.pojo.Item;
import com.taotao.search.pojo.SearchResult;

/**
 * 商品搜索Dao
 * <p>Title: SearchDaoImpl</p>
 * <p>Description: </p>
 * <p>Company:  </p> 
 * @author	杨凯
 * @date	2015年9月11日下午3:26:25
 * @version 1.0
 */
@Repository
public class SearchDaoImpl implements SearchDao {
	
	@Autowired
	private SolrServer solrServer;

	@Override
	public SearchResult search(SolrQuery query) throws Exception {
		//返回值对象
		SearchResult result = new SearchResult();
		//根据查询条件查询索引库
		QueryResponse queryResponse = solrServer.query(query);
		//取查询结果
		SolrDocumentList solrDocumentList = queryResponse.getResults();
		//取查询结果总数量
		result.setRecordCount(solrDocumentList.getNumFound());
		//商品列表
		List<Item> itemList = new ArrayList<>();
		//取高亮显示
		Map<String, Map<String, List<String>>> highlighting = queryResponse.getHighlighting();
		//取商品列表
		for (SolrDocument solrDocument : solrDocumentList) {
			//创建一商品对象
			Item item = new Item();
			item.setId(Long.parseLong((String)solrDocument.get("id")) );
			//取高亮显示的结果
			List<String> list = highlighting.get(solrDocument.get("id")).get("item_title");
			String title = "";
			if (list != null && list.size()>0) {
				title = list.get(0);
			} else {
				title = (String) solrDocument.get("item_title");
			}
			item.setTitle(title);
			item.setImage((String) solrDocument.get("item_image"));
			item.setPrice((long) solrDocument.get("item_price"));
			//设置卖点
			item.setSell_point((String) solrDocument.get("item_sell_point"));
			//商品分类
			item.setCategory_name((String) solrDocument.get("item_category_name"));
			//添加的商品列表
			itemList.add(item);
		}
		result.setItemList(itemList);
		return result;
	}

}