利用Compass实现一个简单的搜索引擎[转]

compass

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2007-03 ( 3)
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compass

搜索引擎 Hibernate Bean XML JDBC

Compass是一流的开放源码JAVA搜索引擎框架，对于你的应用修饰，搜索引擎语义更具有能力。依靠顶级的Lucene搜索引擎，Compass 结合了，像 Hibernate和 Sprin的流行的框架，为你的应用提供了从数据模型和数据源同步改变的搜索力.并且添加了2方面的特征,事物管理和快速更新优化. Compass的目标是：把java应用简单集成到搜索引擎中.编码更少，查找数据更便捷。
    下面以一个应用场景分步骤讲解如何利用compass实现搜索引擎：
1. 这里我们有一个Article表，希望利用compass实现对它的搜索。
  Article的结构如下：
  CREATE TABLE `article` (
    `ArticleID` bigint(20) NOT NULL,
    `PersonInfoID` bigint(20) default NULL,
    `ArticleTitle` varchar(200) default NULL,
    `PublishDate` datetime default NULL,
    `Summary` text,
    `Content` longtext,
    `KeyList` text,
    PRIMARY KEY (`ArticleID`),
    KEY `PersonInfoArticle_FK` (`PersonInfoID`)
  ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
  我们希望利用compass对它的ArticleTitle、Summary、Content和KeyList进行全文检索。下面开始行动吧。

2. 首先到http://www.opensymphony.com/compass/download.action 上下载一个compass的发布版，我们下载的是Version 1.0.0的With Dependencies 。这样就可能省去寻找相关信赖库的麻烦了。

3. 将compass1.0解压到一个合适的目录，我们的工作目录是d:\develop\compass1.0

4. 我们是在eclipse环境下实现当前要求的，所以建议你也安装一个eclipse 3.2。

5. 首先我们在eclipse中建立了一个java工程，名为mycompass。

6. 然后我们在工程目录中建立了一个lib目录，用来存放本次工程所需要的所有compass和其它相关的库文件，并将他们设置为当前工程构建路径中需要的库文件。所有这些文件可以在compass的安装目录的lib目录找到。

  下面是我们的库文件列表：

7. 建立了Article表的pojo类。
  package com.darkhe.sample.mycompass;

  // Generated 2006-8-2 10:57:06 by Hibernate Tools 3.2.0.beta6a

  import java.util.Date;

  /**
   * Article generated by hbm2java
   */
  public class Article implements java.io.Serializable {

   // Fields

   private long articleId;

   private Long personInfoId;

   private String articleTitle;

   private Date publishDate;

   private String summary;

   private String content;

   private String keyList;

   // Constructors

   /** default constructor */
   public Article() {
   }

   /** minimal constructor */
   public Article(long articleId) {
    this.articleId = articleId;
   }

   /** full constructor */
   public Article(long articleId, Long personInfoId, String articleTitle,
     Date publishDate, String summary, String content, String keyList) {
    this.articleId = articleId;
    this.personInfoId = personInfoId;
    this.articleTitle = articleTitle;
    this.publishDate = publishDate;
    this.summary = summary;
    this.content = content;
    this.keyList = keyList;
   }

   // Property accessors
   public long getArticleId() {
    return this.articleId;
   }

   public void setArticleId(long articleId) {
    this.articleId = articleId;
   }

   public Long getPersonInfoId() {
    return this.personInfoId;
   }

   public void setPersonInfoId(Long personInfoId) {
    this.personInfoId = personInfoId;
   }

   public String getArticleTitle() {
    return this.articleTitle;
   }

   public void setArticleTitle(String articleTitle) {
    this.articleTitle = articleTitle;
   }

   public Date getPublishDate() {
    return this.publishDate;
   }

   public void setPublishDate(Date publishDate) {
    this.publishDate = publishDate;
   }

   public String getSummary() {
    return this.summary;
   }

   public void setSummary(String summary) {
    this.summary = summary;
   }

   public String getContent() {
    return this.content;
   }

   public void setContent(String content) {
    this.content = content;
   }

   public String getKeyList() {
    return this.keyList;
   }

   public void setKeyList(String keyList) {
    this.keyList = keyList;
   }

  }

8. 建立hibernate的pojo到数据表映射文件

xml 代码

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
<class name="com.darkhe.sample.mycompass.Article" table="article" catalog="freedom">
<id name="articleId" type="long">
<column name="ArticleID" />
<generator class="assigned" />
</id>
<property name="personInfoId" type="java.lang.Long">
<column name="PersonInfoID"/>
</property>
<property name="articleTitle" type="string">
<column name="ArticleTitle" length="200"/>
</property>
<property name="publishDate" type="timestamp">
<column name="PublishDate" length="19"/>
</property>
<property name="summary" type="string">
<column name="Summary" length="65535"/>
</property>
<property name="content" type="string">
<column name="Content"/>
</property>
<property name="keyList" type="string">
<column name="KeyList" length="65535"/>
</property>
</class>
</hibernate-mapping>

9. 开始配置compass，首先是compass的系统配置文件 mycompass.cfg.xml

xml 代码

<?xml version="1.0" encoding="UTF-8"?>
<compass-core-config
xmlns="http://www.opensymphony.com/compass/schema/core-config"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.opensymphony.com/compass/schema/core-config
http://www.opensymphony.com/compass/schema/compass-core-config.xsd">
<compass name="default">
<connection>
<file path="target" />
</connection>
<searchEngine>
<analyzer name="MMAnalyer" type="CustomAnalyzer" analyzerClass="jeasy.analysis.MMAnalyzer">
<stopWords>
<stopWord value="test" />
</stopWords>
</analyzer>
</searchEngine>
</compass>
</compass-core-config>

在上面的配置中，我们使用的我们选用的一个中文分词算法库，你可以用compass自带的。具体compass提供了哪些分词算法，请查阅compass的手册。

10. 然后是mycompass.cmd.xml

xml 代码

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE compass-core-meta-data PUBLIC "-//Compass/Compass Core Meta Data DTD 1.0//EN"
"http://www.opensymphony.com/compass/dtd/compass-core-meta-data.dtd">
<compass-core-meta-data>
<meta-data-group id="mycompass" displayName="My Compass">
<descrīption>Mycompass Meta Data</descrīption>
<uri>http://com/darkhe/sample/mycompass</uri>
<alias id="Article" displayName="Article">
<descrīption>Article alias</descrīption>
<uri>http://com/darkhe/sample/mycompass/alias/Article</uri>
<name>Article</name>
</alias>
<meta-data id="ArticleTitle" displayName="ArticleTitle">
<descrīption>ArticleTitle</descrīption>
<uri>http://com/darkhe/sample/mycompass/alias/ArticleTitle</uri>
<name>ArticleTitle</name>
</meta-data>
<meta-data id="PublishDate" displayName="PublishDate">
<descrīption>PublishDate</descrīption>
<uri>http://com/darkhe/sample/mycompass/alias/PublishDate</uri>
<name format="yyyy-MM-dd hh:mm:ss">date</name>
</meta-data>
<meta-data id="Summary" displayName="Summary">
<descrīption>Summary</descrīption>
<uri>http://com/darkhe/sample/mycompass/alias/Summary</uri>
<name>Summary</name>
</meta-data>
<meta-data id="Content" displayName="Content">
<descrīption>Content</descrīption>
<uri>http://com/darkhe/sample/mycompass/alias/Content</uri>
<name>Content</name>
</meta-data>
<meta-data id="KeyList" displayName="KeyList">
<descrīption>KeyList</descrīption>
<uri>http://com/darkhe/sample/mycompass/alias/KeyList</uri>
<name>KeyList</name>
</meta-data>
</meta-data-group>
</compass-core-meta-data>

11. 再是mycompass.cpm.xml

xml 代码

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE compass-core-mapping PUBLIC "-//Compass/Compass Core Mapping DTD 1.0//EN"
"http://www.opensymphony.com/compass/dtd/compass-core-mapping.dtd">
<compass-core-mapping package="com.darkhe.sample.mycompass">
<beans>
<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>classpath:jdbc.properties</value>
</property>
</bean>
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName">
<value>${jdbc.driverClassName}</value>
</property>
<property name="url">
<value>${jdbc.url}</value>
</property>
<property name="username">
<value>${jdbc.username}</value>
</property>
<property name="password">
<value>${jdbc.password}</value>
</property>
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref local="dataSource" />
</property>
<property name="mappingResources">
<list>
<value>com/darkhe/sample/mycompass/Article.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">false</prop>
<prop key="hibernate.generate_statistics">true</prop>
</props>
</property>
<property name="eventListeners">
<map>
<entry key="merge">
<bean class="org.springframework.orm.hibernate3.support.IdTransferringMergeEventListener" />
</entry>
</map>
</property>
</bean>
<bean id="compass" class="org.compass.spring.LocalCompassBean">
<property name="resourceLocations">
<list>
<value>classpath:mycompass.cmd.xml</value>
<value>classpath:mycompass.cpm.xml</value>
</list>
</property>
<property name="configLocation">
<value>classpath:mycompass.cfg.xml</value>
</property>
</beans>

15. 注意上面的所以配置文件，根据我们上面的配置，都应当放到classpath的根路径。
16. 建立工具类，用来进行spring引擎的初始化工作。

java 代码

/**
*
@(#) IOC.java 2006-2-1 0:08:23
*/
package com.darkhe.sample.mycompass;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
/**
*
*
* @version 1.0 2006-2-1
* @author darkhe
*/
public class IOC {

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一个简单的COMPASS应用实例(compass1.1) | 理解Compass的配置文件[转]

2007-03-26 10:06
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1 楼 zznj1123 2008-10-31

没写完啊大哥

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