Solr空间搜索之周边酒店搜索

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现在移动开发中越来越多的App都有周边搜索，有找附近的人的，附近的酒店，附近的餐馆的。接下来我们就来讲一下强大的Solr来帮我们构建周边搜索之酒店搜索。

1 下载 Solr 3.6.2

下载地址:http://www.apache.org/dyn/closer.cgi/lucene/solr/3.6.2

提取apache-solr-3.6.2.zip里的apache-solr-3.6.2.war到F:\, 后面会讲解如何部署这个war包

2 建立solr的索引库配置

2.1 在D:\建立目录hotel_solr

2.2 在D:\hotel_solr下新建solr.xml,内容如下:

<?xml version="1.0" encoding="UTF-8" ?>
<solr persistent="false">
  <cores adminPath="/admin/cores">
    <core name="core0" instanceDir="core0" />
    <!--<core name="core1" instanceDir="core1" />-->
  </cores>
</solr>

2.3 在D:\hotel_solr新建core0\conf目录

2.4 在D:\hotel_solr\core0\conf目录下，新建schema.xml文件,内容如下:

<?xml version="1.0" ?>
<schema name="example core zero" version="1.1">
  <types>
   <fieldType name="string" class="solr.StrField" sortMissingLast="true" omitNorms="true"/>
         <fieldType name="boolean" class="solr.BoolField" sortMissingLast="true" omitNorms="true"/>
         <fieldType name="integer" class="solr.IntField" omitNorms="true"/>
         <fieldType name="int" class="solr.TrieIntField" precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
         <fieldType name="float" class="solr.TrieFloatField" precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
         <fieldType name="long" class="solr.TrieLongField" precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
         <fieldType name="double" class="solr.TrieDoubleField" precisionStep="0" omitNorms="true" positionIncrementGap="0"/>
         <fieldType name="tint" class="solr.TrieIntField" precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
         <fieldType name="tfloat" class="solr.TrieFloatField" precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
         <fieldType name="tlong" class="solr.TrieLongField" precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
         <fieldType name="tdouble" class="solr.TrieDoubleField" precisionStep="8" omitNorms="true" positionIncrementGap="0"/>
         <fieldType name="sint" class="solr.SortableIntField" sortMissingLast="true" omitNorms="true"/>
         <fieldType name="slong" class="solr.SortableLongField" sortMissingLast="true" omitNorms="true"/>
         <fieldType name="sfloat" class="solr.SortableFloatField" sortMissingLast="true" omitNorms="true"/>
         <fieldType name="sdouble" class="solr.SortableDoubleField" sortMissingLast="true" omitNorms="true"/>
         <fieldType name="date" class="solr.TrieDateField" omitNorms="true" precisionStep="0" positionIncrementGap="0"/>
         <fieldType name="tdate" class="solr.TrieDateField" omitNorms="true" precisionStep="6" positionIncrementGap="0"/>
         <fieldtype name="ignored" stored="false" indexed="false" class="solr.StrField"/>
         <fieldtype name="location" class="solr.LatLonType" subFieldSuffix="_d"/>
         <fieldType name="text" class="solr.TextField" positionIncrementGap="100">
               <analyzer type="index">
                 <tokenizer class="solr.StandardTokenizerFactory"/>
                 <filter class="solr.LowerCaseFilterFactory"/>
               </analyzer>
               <analyzer type="query">
                 <tokenizer class="solr.StandardTokenizerFactory"/>
                 <filter class="solr.LowerCaseFilterFactory"/>
               </analyzer>
         </fieldType>
  </types>
 <fields>
  <field name="hotel_id" type="integer" indexed="true" stored="true" required="true"/>
  <field name="crawl_hotel_id"    type="string"   indexed="true"  stored="true"  multiValued="false" required="true"/> 
  <field name="name"    type="text"   indexed="true"  stored="true"  multiValued="false" required="true"/> 
  <field name="address"    type="text"   indexed="true"  stored="true"  multiValued="false" required="true"/> 
  <field name="search_kw" type="text" indexed="true" multiValued="true" stored="false" /> 
  <field name="latlng" type="location" indexed="true" />
  <dynamicField name="*_d" type="double" indexed="true" stored="true"/>
 </fields>
 <copyField source="name" dest="search_kw" />
 <copyField source="address" dest="search_kw" />
 <uniqueKey>hotel_id</uniqueKey>
 <defaultSearchField>search_kw</defaultSearchField>
 <solrQueryParser defaultOperator="AND"/>
</schema>

2.5 在D:\hotel_solr\core0\conf目录下，新建solrconfig.xml文件,内容如下:

<?xml version="1.0" encoding="UTF-8" ?>
<config>
  <luceneMatchVersion>LUCENE_36</luceneMatchVersion>
  <directoryFactory name="DirectoryFactory" class="${solr.directoryFactory:solr.StandardDirectoryFactory}"/>
  <updateHandler class="solr.DirectUpdateHandler2" />
  <requestDispatcher handleSelect="true" >
    <requestParsers enableRemoteStreaming="false" multipartUploadLimitInKB="2048" />
  </requestDispatcher>
  <requestHandler name="standard" class="solr.StandardRequestHandler" default="true" />
  <requestHandler name="/update" class="solr.XmlUpdateRequestHandler" />
  <requestHandler name="/admin/" class="org.apache.solr.handler.admin.AdminHandlers" />
  <admin>
    <defaultQuery>*:*</defaultQuery>
  </admin>
</config>

到这里为止Solr的索引配置完成.

3 配置tomcat

3.1 让tomcat支持HTTP GET UTF-8编码的支持, 打开D:\apache-tomcat-7.0.16\conf\server.xml，修成如下地方:

<Connector port="8080" protocol="HTTP/1.1" 
               connectionTimeout="20000" 
               redirectPort="8443" URIEncoding="UTF-8"/>

3.2 配置solr的war包

在D:\apache-tomcat-7.0.16\conf\Catalina\localhost新建solr.xml,内容如下:

<Context docBase="F:/apache-solr-3.6.2.war" debug="0" crossContext="true" >  
  <Environment name="solr/home" type="java.lang.String" value="D:/hotel_solr" override="true" />  
</Context>

3.3 启动tomcat, 在浏览器中输入:http://localhost:8080/solr/ 如果出现Admin core0 表示正常。

4 准备酒店数据(如果没有自己去建立)

5 把数据库中的酒店数据添加到Solr索引库中

使用Solrj客户端进行索引构建和查询,MAVEN依赖包：

<dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
    <dependency>
    	<groupId>org.apache.solr</groupId>
    	<artifactId>solr-solrj</artifactId>
    	<version>3.6.0</version>
    </dependency>
    <dependency>
    	<groupId>mysql</groupId>
    	<artifactId>mysql-connector-java</artifactId>
    	<version>5.1.19</version>
    </dependency>
    <dependency>
    	<groupId>commons-lang</groupId>
    	<artifactId>commons-lang</artifactId>
    	<version>2.6</version>
    </dependency>
    <dependency>
    	<groupId>org.apache.httpcomponents</groupId>
    	<artifactId>httpclient</artifactId>
    	<version>4.1.3</version>
    </dependency>
    <dependency>
    	<groupId>org.apache.httpcomponents</groupId>
    	<artifactId>httpclient-cache</artifactId>
    	<version>4.1.3</version>
    </dependency>
    <dependency>
    	<groupId>org.apache.httpcomponents</groupId>
    	<artifactId>httpmime</artifactId>
    	<version>4.1.3</version>
    </dependency>
    <dependency>
    	<groupId>org.slf4j</groupId>
    	<artifactId>slf4j-simple</artifactId>
    	<version>1.6.4</version>
    </dependency>

Java代码:

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.HashMap;
import java.util.Map;

import org.apache.commons.lang.StringUtils;
import org.apache.solr.client.solrj.SolrRequest.METHOD;
import org.apache.solr.client.solrj.impl.HttpSolrServer;
import org.apache.solr.client.solrj.response.QueryResponse;
import org.apache.solr.common.SolrDocumentList;
import org.apache.solr.common.SolrInputDocument;
import org.apache.solr.common.params.MapSolrParams;

public class App {

	/**
	 * 初始化索引数据
	 * @param solrServer
	 * @throws Exception
	 */
	public static void buildIndex(String solrServer) throws Exception {
		Connection connect = null;
		Statement statement = null;
		ResultSet resultSet = null;
		HttpSolrServer server = null;
		try {
			Class.forName("com.mysql.jdbc.Driver");
			connect = DriverManager
					.getConnection("jdbc:mysql://localhost/hotel_analysis?"
							+ "user=root&password=11111");
			statement = connect.createStatement();
			resultSet = statement
					.executeQuery("select hotel_id,crawl_hotel_id,hotel_name,hotel_address,hotel_location from crawl_hotel");
			server = new HttpSolrServer(solrServer);

			int count = 0;

			int eachCommit = 100;
			//从数据库中获取酒店数据
			while (resultSet.next()) {
				Integer hotel_id = resultSet.getInt(1);
				String crawl_hotel_id = resultSet.getString(2);
				String hotel_name = resultSet.getString(3);
				String hotel_address = resultSet.getString(4);
				String hotel_location = resultSet.getString(5);
				if (StringUtils.isBlank(hotel_location)) {
					continue;
				}
				count++;
				//添加酒店数据到Solr索引中
				SolrInputDocument doc = new SolrInputDocument();
				doc.addField("hotel_id", hotel_id);
				doc.addField("crawl_hotel_id", crawl_hotel_id);
				doc.addField("name", hotel_name);
				doc.addField("address", hotel_address);
				doc.addField("latlng", hotel_location);
				server.add(doc);
				//100条commit一次
				if (count % eachCommit == 0) {
					server.commit();
					count = 0;
				}
			}
			if (count > 0) {
				server.commit();
				count = 0;
			}
		} finally {
			if (null != resultSet) {
				try {
					resultSet.close();
				} catch (SQLException ex) {

				}
			}
			if (null != statement) {
				try {
					statement.close();
				} catch (SQLException ex) {

				}
			}
			if (null != connect) {
				try {
					connect.close();
				} catch (SQLException ex) {

				}
			}
		}
	}
	public static void main(String[] args) throws Exception {
		String URL = "http://localhost:8080/solr/core0";
		//构建索引到Solr库
		buildIndex(URL);
	        //索引周边查询
		//queryTest(URL);
	}
	/**
	 * 测试索引查询
	 * http://localhost:8080/solr/core0/select?q=*%3A*&fq=%7B%21geofilt%7D&pt=31.26552%2C121.460815&sfield=latlng&d=2&sort=geodist%28%29+asc&fl=*%2Cscore&start=0&rows=10
	 * @param solrServer
	 * @throws Exception
	 */
	public static void queryTest(String solrServer) throws Exception {
		HttpSolrServer server = new HttpSolrServer(solrServer);
		Map<String,String> params = new HashMap<String,String>(); 
		params.put("q", "*:*");
		params.put("fq", "{!geofilt}");//距离过滤函数
		params.put("pt", "31.26552,121.460815");//当前经纬度
		params.put("sfield", "latlng");//经纬度的字段
		params.put("d", "2");//就近2公里的所有酒店
		params.put("sort", "geodist() asc");//根据距离排序
		params.put("fl", "*,score");
		params.put("start", "0");//记录开始位置
		params.put("rows", "10");//查询的行数
		QueryResponse resp = server.query(new MapSolrParams(params), METHOD.POST);
		SolrDocumentList docs = resp.getResults();
		for(int i=0;i<docs.size();i++){
			System.out.println(docs.get(i));
		}
	}
}

6 查询展示：