用compass实现站内全文搜索引擎(二)

接下来是要建立搜索的服务类

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.compass.core.Compass;
import org.compass.core.CompassCallback;
import org.compass.core.CompassException;
import org.compass.core.CompassHighlighter;
import org.compass.core.CompassHits;
import org.compass.core.CompassQuery;
import org.compass.core.CompassSession;
import org.compass.core.CompassTemplate;
import org.compass.core.CompassTransaction;
import cn.rgcenter.entity.Article;

public class SearchServiceBean {

	private Compass compass;
	/** 索引查询 * */
	public Map find(final String keywords, final String type, final int start,
			final int end) {
		CompassTemplate ct = new CompassTemplate(compass);
		return ct.execute(new CompassCallback<Map>() {

			public Map doInCompass(CompassSession session)
					throws CompassException {
				List result = new ArrayList();
				int totalSize = 0;
				Map container = new HashMap();
				CompassQuery query = session.queryBuilder().queryString(
						keywords).toQuery();
				CompassHits hits = query.setAliases(type).hits();
				totalSize = hits.length();
				container.put("size", totalSize);
				int max = 0;
				if (end < hits.length()) {
					max = end;
				} else {
					max = hits.length();
				}

       if(type.equals("article")){
					for (int i = start; i < max; i++) {
						Article article = (Article) hits.data(i);
						String title = hits.highlighter(i).fragment("title");
						if (title != null) {
							article.setTitle(title);
						}
						String content = hits.highlighter(i).setTextTokenizer(
								CompassHighlighter.TextTokenizer.AUTO)
								.fragment("content");
						if (content != null) {

							article.setContent(content);
						}
						result.add(article);
					}
				}
				container.put("result", result);
				return container;
			}
		});
	}

	public Compass getCompass() {
		return compass;
	}

	public void setCompass(Compass compass) {
		this.compass = compass;
	}

}

索引的查询主要是根据传过来的参数，关键字keywords,是搜索的关键字,类型type，先判断是不是要搜索文章，因为一般来说，页面的搜索引擎不单单只搜索文章一个实体.
至于int 和end是为了分页取出部分结果的.
String title = hits.highlighter(i).fragment("title");这段是检索titile这个属性有没有出现搜索的关键字，有就将它高亮（其实就是在关键字前后加个<font></font>的html标记设置颜色，等下可以看到在配置文件里可以自由设置高亮的颜色）.
String content = hits.highlighter(i).setTextTokenizer(
CompassHighlighter.TextTokenizer.AUTO)
.fragment("content");

这段代码和上面的title具有一样的一样的功能，另外还多了个很重要的功能，自动选择正文中最匹配关键字的内容中的一部分输出。因为很多时候一篇文章几千字，我们只想显示有关键字的那部分的摘要，这时候这个功能就很方便.


这之后还要写一个建立索引的服务类，让服务器启动的时候或者定时重建索引.

import org.compass.gps.CompassGps;
import org.springframework.beans.factory.InitializingBean;

public class CompassIndexBuilder implements InitializingBean {  
	
    // 是否需要建立索引，可被设置为false使本Builder失效.   
    private boolean buildIndex = false;   
  
    // 索引操作线程延时启动的时间，单位为秒   
    private int lazyTime = 10;   
  
    // Compass封装   
    private CompassGps compassGps;   
  
    // 索引线程   
    private Thread indexThread = new Thread() {   
  
        @Override  
        public void run() {   
            try {   
                Thread.sleep(lazyTime * 1000);   
                System.out.println("begin compass index...");   
                long beginTime = System.currentTimeMillis();   
                // 重建索引.   
                // 如果compass实体中定义的索引文件已存在，索引过程中会建立临时索引，   
                // 索引完成后再进行覆盖.   
                compassGps.index();   
                long costTime = System.currentTimeMillis() - beginTime;   
                System.out.println("compss index finished.");   
                System.out.println("costed " + costTime + " milliseconds");   
            } catch (InterruptedException e) {   
                e.printStackTrace();   
            }   
        }   
    };   
  
    /**  
     * 实现<code>InitializingBean</code>接口，在完成注入后调用启动索引线程.
     */  
    public void afterPropertiesSet() throws Exception {   
        if (buildIndex) {   
            indexThread.setDaemon(true);   
            indexThread.setName("Compass Indexer");   
            indexThread.start();   
        }   
    }   
  
    public void setBuildIndex(boolean buildIndex) {   
        this.buildIndex = buildIndex;   
    }   
  
    public void setLazyTime(int lazyTime) {   
        this.lazyTime = lazyTime;   
    }   
  
    public void setCompassGps(CompassGps compassGps) {   
        this.compassGps = compassGps;   
    }   
} 

实现了spring的InitializingBean接口，让服务器启动，bean初始化的时候去建立索引


剩下的就是配置文件了

<?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:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
			http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
			http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">

	<bean id="annotationConfiguration"
		class="org.compass.annotations.config.CompassAnnotationsConfiguration">
	</bean>

	<!-- compass Bean  -->
	<bean id="compass" class="org.compass.spring.LocalCompassBean">
		<property name="compassConfiguration"
			ref="annotationConfiguration" />
	    <!-- 数据索引存储位置 -->
	    <property name="connection">
            <value>/compass/indexes</value>
        </property>
		<property name="transactionManager" ref="transactionManager" />
		<property name="compassSettings">
			<props>
				<prop key="compass.transaction.factory">
					org.compass.spring.transaction.SpringSyncTransactionFactory
				</prop>
			
				<prop
					key="compass.engine.highlighter.default.formatter.simple.pre">
					<![CDATA[<span style='background-color:yellow;color:red;'>]]>
				</prop>
				<prop
					key="compass.engine.highlighter.default.formatter.simple.post">
					<![CDATA[</span>]]>
				</prop>
	<!--定义分词器-->			
<prop
					key="compass.engine.analyzer.default.type">
					org.mira.lucene.analysis.IK_CAnalyzer
				</prop>
			</props>
		</property>
		<property name="classMappings">
			<list>
			
				<value>cn.rgcenter.entity.Article</value>
			</list>
		</property>
	</bean>

	<!--hibernate驱动-->
	<bean id="hibernateGpsDevice"
		class="org.compass.spring.device.hibernate.dep.SpringHibernate3GpsDevice">
		<property name="name">
			<value>hibernateDevice</value>
		</property>
		<property name="sessionFactory" ref="sessionFactory" />
		<property name="mirrorDataChanges">
			<value>true</value>
		</property>
	</bean>

	<!-- 数据库中的数据变化后同步更新索引 -->
	<bean id="hibernateGps"
		class="org.compass.gps.impl.SingleCompassGps" init-method="start"
		destroy-method="stop">
		<property name="compass">
			<ref bean="compass" />
		</property>
		<property name="gpsDevices">
			<list>
				<bean
					class="org.compass.spring.device.SpringSyncTransactionGpsDeviceWrapper">
					<property name="gpsDevice" ref="hibernateGpsDevice" />
				</bean>
			</list>
		</property>
	</bean>

	<!-- compass模版 -->
	<bean id="compassTemplate"
		class="org.compass.core.CompassTemplate">
		<property name="compass" ref="compass" />
	</bean>

	<!-- 定时重建索引(利用quartz)或随Spring ApplicationContext启动而重建索引 -->
	<bean id="compassIndexBuilder"
		class="cn.rgcenter.compass.service.CompassIndexBuilder"
		lazy-init="false">
		<property name="compassGps" ref="hibernateGps" />
		<property name="buildIndex" value="true" />
		<property name="lazyTime" value="5" />
	</bean>

    <!-- 搜索引擎服务类 -->
	<bean id="searchService"
		class="cn.rgcenter.compass.service.SearchServiceBean">
		<property name="compass">
			<ref bean="compass" />
		</property>
	</bean>

	<!-- 搜索引擎Action -->
	<bean id="searchAction" class="cn.rgcenter.action.SearchAction">
		<property name="searchService">
			<ref bean="searchService" />
		</property>
	</bean>

</beans>

至于action就不列出代码了，很简单了，只需要传搜索方法的那几个参数过去就可以了.

最后看一下搜索结果示例图:

评论

6 楼 Jackie_GP 2015-02-14  

楼主你好，我也想要一份源码，可以吗？[e-mail] 非常谢谢！

5 楼 xiaojings101 2013-11-26  

我用的是,mybatis 能和compass整合吗  看到请加qq273220939 有偿

4 楼 sjxinrui 2012-05-15  

LZ...我用的springmvc。。 现在木有JSP和controller。。。启动成功。。一小会后所搜线程开启。。然后报错Exception in thread "Compass Indexer" java.lang.IllegalArgumentException: No entities listed to be indexed, have you defined your entities correctly?。。。。这是神马情况。。求教。。。。
还有啊。。。你最后这个结果图怎么出来的。。你的entity映射到数据库了吗。。这些字段都是什么内容啊？肿么就搜出文章来了呢。。。

3 楼 ┿┅мīSS 2011-07-22  

wanglinlin 写道

[e-mail]
能否给我一份源码，谢谢

不好意思啊，2年前的文章了，我也没源码了..

2 楼 wanglinlin 2011-07-22  

[e-mail]
能否给我一份源码，谢谢

1 楼 gaowenming 2010-10-12  

楼主能提供源代码吗？
可否发给我一份
[e-mail]