COMPASS+spring 构建自己的搜索引擎
在新架构中打算选择Compass或Hibernate Search作为搜索引擎框架，比较后，感觉Hibernate Search上还是没有Compass成熟，另外考虑到后期对网页的爬取及搜索需求，决定还是基于Compass来作为架构缺省的搜索引擎。网上关于 Compass的文档很多，但说得相对完整其详细的入门文档基本上没有，Compass的官方文档倒是说得很详细，但是例子一塌糊涂，存在很大问题。记录一下搭建的过程，作为入门的指南。
Compass 通过OSEM(Object/Search Engine Mapping)允许把应用对象的领域模型映射到搜索引擎，最终通过访问common meta data来达到访问对象的目的。
1、几个核心概念
1.1、annotation vs. xml配置文件
Compass的配置文件主要分成三类：
第一类：*.cmd.xml文件*
.cmd.xml文件是对common meta data进行定义，定义了最终搜索的结果中的最基本的元数据。
第二类：*.cpm.xml文件
*.cpm.xml是Object/Search Engine Mapping,提供了POJO到common meta data的映射。
第三类：*.cfg.xml文件
Compass的*.cfg.xml定义了Compass的Index存放路径、搜索引擎分词等相关信息。
与采用xml配置文件相比较，采用Annonation方式还是相对简单，尤其是采用Spring时候，不用写*.cmd.xml文件、*.cpm.xml、*.cfg.xml，相对很方便，而且不像Hibernate的Annonation很多，Compass的 Annonation的核心标注只有@Searchable、@SearchableId、@SearchableProperty、 @SearchableComponent个，很容易记忆。因此推荐使用Annonation方式
１.2、Compass核心API
Compass的核心API借鉴了Hibernate的术语，因此在操作上基本上与Hibernate类似，以下为Compass的几个核心接口：
CompassConfiguration(类似Hibernate Configuration)：用来在一些设置参数、配置文件和映射定义上配置Compass。通常用来创建Compass接口。
Compass(类似Hibernate SessionFactory)：为单线程使用，创建线程安全的实例来打开Compass Seesion。同样还提供了一些搜索引擎索引级别的操作。
CompassSesssion(类似Hibernate Session)：用来执行像保存、删除、查找、装载这样的搜索操作。很轻量但是并不是线程安全的。
CompassTransaction(类似Hibernate Transaction)：管理Compass事务的接口。使用它并不需要事务管理环境（像Spring、JTA）。
1.3、Compass与Spring集成
Compass 已经对对spring集成做了很好的封装，同时与Spring对Hibernate的支持类似，Compass也提供了CompassTemplate来简化诸如对Session、Transaction、Exception等操作，尽量充分使用此工具，可以有效提高效率。例如：
CompassTemplate ct = (CompassTemplate) context.getBean("compassTemplate");
Article article = new Article();
article.setTitle("Compass Test");
article.setPublishDate(new Date());
article.setAuthor(1);
ct.save(article); //存储对象需要索引的数据到Compass的索引中。
2、软件环境
Spring ：2.5
Compas：1.2.1
Hibernate：3.2.5
Mysql ：5.0.5
3、数据库脚本
CREATE TABLE `article` (
`Id` int(11) NOT NULL auto_increment,
`title` varchar(40) NOT NULL default '',
`author` int(11) default '0',
`publish_date` date NOT NULL default '0000-00-00',
PRIMARY KEY (`Id`) ) TYPE=MyISAM;
CREATE TABLE `author` (
`Id` int(11) NOT NULL auto_increment,
`username` varchar(20) NOT NULL default '',
`password` varchar(20) NOT NULL default '',
`age` smallint(6) default '0',
PRIMARY KEY (`Id`) ) TYPE=MyISAM;
4、测试用例
从测试用例讲起比较容易把关系理清楚，不然一堆术语和概念很让人晕乎。
import org.apache.log4j.Logger;
import java.util.Date;
import junit.framework.TestCase;
import org.compass.core.Compass;
import org.compass.core.CompassDetachedHits;
import org.compass.core.CompassHit;
import org.compass.core.CompassHits;
import org.compass.core.CompassSession;
import org.compass.core.CompassTemplate;
import org.compass.core.CompassTransaction;
import org.compass.core.support.search.CompassSearchCommand;
import org.compass.core.support.search.CompassSearchResults;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.mobilesoft.esales.dao.hibernate.ArticleDAO;
import com.mobilesoft.esales.dao.hibernate.AuthorDAO;
import com.mobilesoft.esales.model.Article;
import com.mobilesoft.esales.model.Author;
import com.mobilesoft.framework.search.service.CompassSearchService;
/**
* Compass服务使用的测试用例
*
* @author liangchuan@mobile-soft.cn
*
*/
public class TestCompass extends TestCase {
private static final Logger logger = Logger.getLogger(TestCompass.class);
private static ClassPathXmlApplicationContext context = null;
private static CompassTemplate ct;
static {
context = new ClassPathXmlApplicationContext(new String[] {
"applicationContext.xml", "applicationContext-resources.xml",
"applicationContext-dao.xml", "applicationContext-service.xml",
"applicationContext-compass.xml" });
ct = (CompassTemplate) context.getBean("compassTemplate");
}
protected void setUp() throws Exception {
}
/**
* 插入测试数据
*/
public void testInsert() {
ArticleDAO articleDao = (ArticleDAO) context.getBean("articleDAO");
AuthorDAO authorDao = (AuthorDAO) context.getBean("authorDAO");
Article article = new Article();
Author author = new Author();
author.setAge((short) 27);
author.setUsername("liangchuan");
author.setPassword("liangchuan");
article.setTitle("Compass Test");
article.setPublishDate(new Date());
article.setAuthor(1);
authorDao.save(author);
articleDao.save(article);
ct.save(article);
ct.save(author);
}
/**
* 用于测试使用CompassTransaction事务方式
*/
public void testTransactionalFind() {
Compass compass = ct.getCompass();
CompassSession session = compass.openSession();
CompassTransaction tx = null;
try {
tx = session.beginTransaction();
CompassHits hits = session.find("Compass*");
logger.error("testTransactionalFind() - CompassHits hits="
+ hits.getLength());
for (int i = 0; i < hits.getLength(); i++) {
Object hit = hits.data(i);
if (hit instanceof Article) {
Article item = (Article) hit;
logger.error("testTransactionalFind() - article hits="
+ item.getTitle());
} else if (hit instanceof Author) {
Author item = (Author) hit;
logger.error("testTransactionalFind() - author hits="
+ item.getUsername());
} else {
logger.error("testTransactionalFind() - error hits=");
}
}
tx.commit();
} catch (Exception e) {
if (tx != null) {
tx.rollback();
}
} finally {
session.close();
}
}
/**
* 用于演示CompassDetachedHits的使用。
* 由于CompassTempalte得到的结果集必须在transactionalcontext中才能使用，
* 因此必须使用CompassDetachedHits方式测试CompassDetachedHits方式
*/
public void testDetachedFind() {
// 由于CompassTempalte得到的结果集必须在transactional
// context中才能使用，因此必须使用CompassDetachedHits方式
// 测试CompassDetachedHits方式
CompassDetachedHits hits = ct.findWithDetach("Compass*");
logger.error("testDetachedFind() - CompassHits hits="
+ hits.getLength());
for (int i = 0; i < hits.getLength(); i++) {
Object hit = hits.data(i);
if (hit instanceof Article) {
Article item = (Article) hit;
logger.error("testDetachedFind() - article hits="
+ item.getTitle());
} else if (hit instanceof Author) {
Author item = (Author) hit;
logger.error("testDetachedFind() - author hits="
+ item.getUsername());
} else {
logger.error("testDetachedFind() - error hits=");
}
}
}
/**
* 用于演示com.mobilesoft.framework.search.service.CompassSearchService的使用
*
*/
class CompassSearch extends CompassSearchService{
CompassSearch(){
Compass compass = ct.getCompass();
CompassSession session = compass.openSession();
CompassTransaction tx = null;
try {
tx = session.beginTransaction();
CompassSearchCommand command = new CompassSearchCommand();
command.setQuery("Compass");
CompassSearchResults results= performSearch(command,session);
logger.error("CompassSearch() - CompassHit TotalHits value=" +results.getTotalHits());
for (int i = 0; i < results.getHits().length; i++) {
CompassHit hits=results.getHits()[i];
Object hit=hits.getData();
logger.error("CompassSearch() - CompassHit hit=" + hit); //$NON-NLS-1$
if (hit instanceof Article) {
Article item = (Article) hit;
logger.error("testCompassSearchService() - article hits="
+ item.getTitle());
} else if (hit instanceof Author) {
Author item = (Author) hit;
logger.error("testCompassSearchService() - author hits="
+ item.getUsername());
} else {
logger.error("testCompassSearchService() - error hits=");
}
tx.commit();
}
} catch (Exception e) {
if (tx != null) {
tx.rollback();
}
} finally {
session.close();
}
}
}
public void testCompassSearchService() {
new CompassSearch();
}
protected void tearDown() throws Exception {
}
}
5、配置文件
applicationContext-compass.xml
applicationContext-dao.xml、applicationContext-service.xml、applicationContext-resources.xml等略去。
<?xml version="1.0"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN"
"http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans default-lazy-init="true">
<bean id="compassTemplate" ref="compass"/>
</bean>
<bean id="annotationConfiguration"
ref="annotationConfiguration"/>
<property name="compassSettings">
<props>
<prop key="compass.engine.connection"> file://compass </prop>
<prop key="compass.transaction.factory">
org.compass.spring.transaction.SpringSyncTransactionFactory
</prop>
<prop
key="compass.engine.highlighter.default.formatter.simple.pre">
<![CDATA[<font color="red"><b>]]>
</prop>
<prop
key="compass.engine.highlighter.default.formatter.simple.post">
<![CDATA[</b></font>]]>
</prop>
</props>
</property>
<property name="transactionManager" ref="transactionManager"/>
</bean>
<bean id="hibernateGpsDevice"
ref="sessionFactory"/>
<property name="mirrorDataChanges">
<value>true</value>
</property>
</bean>
<bean id="compassGps" destroy-method="stop">
<property name="compass" ref="compass"/>
<property name="gpsDevices">
<list>
<bean
ref="hibernateGpsDevice"/>
</bean>
</list>
</property>
</bean>
<bean id="compassSearchService" ref="compass"/>
<property name="pageSize" value="15"/>
</bean>
<!-- 定时重建索引(利用quartz)或随Spring ApplicationContext启动而重建索引 -->
<bean id="compassIndexBuilder" lazy-init="false">
<property name="compassGps" ref="compassGps"/>
<property name="buildIndex" value="false"/>
<property name="lazyTime" value="10"/>
</bean>
</beans>
6、Service层(参考了SpringSide实现)
AdvancedSearchCommand.java
package com.mobilesoft.framework.search.service;
import java.util.HashSet;
import java.util.Set;
import org.apache.commons.lang.StringUtils;
import org.compass.core.CompassQuery.SortDirection;
import org.compass.core.CompassQuery.SortPropertyType;
import org.compass.core.support.search.CompassSearchCommand;
import org.springframework.util.Assert;
public class AdvancedSearchCommand extends CompassSearchCommand {
/**
* 封装基于Compass 的排序参数.
*/
class CompassSort {
private String name;
private SortPropertyType type;
private SortDirection direction;
public CompassSort() {
}
public CompassSort(String sortParamName, String paramType,
boolean isAscend) {
Assert.isTrue(StringUtils.isNotBlank(sortParamName));
setName(sortParamName);
if ("int".equalsIgnoreCase(paramType)) {
setType(SortPropertyType.INT);
} else if ("float".equalsIgnoreCase(paramType)) {
setType(SortPropertyType.FLOAT);
} else if ("string".equalsIgnoreCase(paramType)) {
setType(SortPropertyType.STRING);
} else {
setType(SortPropertyType.AUTO);
}
if (isAscend) {
setDirection(SortDirection.AUTO);
} else {
setDirection(SortDirection.REVERSE);
}
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public SortPropertyType getType() {
return type;
}
public void setType(SortPropertyType type) {
this.type = type;
}
public SortDirection getDirection() {
return direction;
}
public void setDirection(SortDirection direction) {
this.direction = direction;
}
}
/**
* 搜索结果排序表.
*/
private Set<CompassSort> sortMap = new HashSet<CompassSort>();
private String[] highlightFields;
/**
* @param paramType 现定义了三种类型： int string 以及 float。<br>
* 除去这三种外，其他会被自动定义为SortPropertyType.AUTO 具体的可见{@link org.compass.core.CompassQuery.SortPropertyType}
* @param isAscend 顺序还是倒序排序
* @see org.compass.core.CompassQuery.SortPropertyType#AUTO
* @see org.compass.core.CompassQuery.SortPropertyType#INT
* @see org.compass.core.CompassQuery.SortPropertyType#STRING
* @see org.compass.core.CompassQuery.SortPropertyType#FLOAT
* @see org.compass.core.CompassQuery.SortDirection#AUTO
* @see org.compass.core.CompassQuery.SortDirection#REVERSE
*/
public void addSort(String sortParamName, String paramType, boolean isAscend) {
this.sortMap.add(new CompassSort(sortParamName, paramType, isAscend));
}
public Set<CompassSort> getSortMap() {
return sortMap;
}
public void setSortMap(Set<CompassSort> sortMap) {
this.sortMap = sortMap;
}
public String[] getHighlightFields() {
return highlightFields;
}
public void setHighlightFields(String[] highlightFields) {
this.highlightFields = highlightFields;
}
}
CompassIndexBuilder.java
package com.mobilesoft.framework.search.service;
import org.apache.log4j.Logger;
import org.compass.gps.CompassGps;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;
/**
* 通过quartz定时调度定时重建索引或自动随Spring ApplicationContext启动而重建索引的Builder.
* 会启动后延时数秒新开线程调用compassGps.index()函数.
* 默认会在Web应用每次启动时重建索引,可以设置buildIndex属性为false来禁止此功能.
* 也可以不用本Builder, 编写手动调用compassGps.index()的代码.
*
*/
public class CompassIndexBuilder implements InitializingBean {
private static final Logger log = Logger.getLogger(CompassIndexBuilder.class);
// 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);
log.info("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;
log.info("compss index finished.");
log.info("costed " + costTime + " milliseconds");
} catch (InterruptedException e) {
// simply proceed
}
}
};
/**
* 实现<code>InitializingBean</code>接口，在完成注入后调用启动索引线程.
*
* @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
public void afterPropertiesSet() throws Exception {
if (buildIndex) {
Assert.notNull(compassGps, "CompassIndexBuilder not set CompassGps yet.");
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;
}
}
CompassSearchService.java
package com.mobilesoft.framework.search.service;
import org.compass.core.Compass;
import org.compass.core.CompassCallback;
import org.compass.core.CompassDetachedHits;
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 org.compass.core.support.search.CompassSearchCommand;
import org.compass.core.support.search.CompassSearchResults;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.util.Assert;
import com.mobilesoft.framework.search.service.AdvancedSearchCommand.CompassSort;
/**
* 仿照 {@link org.compass.spring.web.mvc.CompassSearchController}
* 中的代码，构建了一个Service，方便不使用Spring MVC
*
* @see org.compass.spring.web.mvc.CompassSearchController
* @see org.compass.spring.web.mvc.AbstractCompassCommandController
*/
public class CompassSearchService implements InitializingBean {
//每页显示的条目数量
private Integer pageSize = 15;
private Compass compass;
private CompassTemplate compassTemplate;
/**
* 公开的搜索接口，返回匹配的搜索结果，与
* {@link org.compass.spring.web.mvc.CompassSearchController#handle(javax.servlet.http.HttpServletRequest,
*javax.servlet.http.HttpServletResponse,Object,org.springframework.validation.BindException) 处理相似
*
* @see org.compass.spring.web.mvc.CompassSearchController#handle(javax.servlet.http.HttpServletRequest,
*javax.servlet.http.HttpServletResponse,java.lang.Object,org.springframework.validation.BindException)
*/
public CompassSearchResults search(final CompassSearchCommand command) {
return (CompassSearchResults) getCompassTemplate().execute(
CompassTransaction.TransactionIsolation.READ_ONLY_READ_COMMITTED, new CompassCallback() {
public Object doInCompass(CompassSession session) {
return performSearch(command, session);
}
});
}
/**
* 通过此方法调用搜索引擎,进行结果匹配搜索.
*
* @see org.compass.spring.web.mvc.CompassSearchController#performSearch(
*org.compass.spring.web.mvc.CompassSearchCommand,org.compass.core.CompassSession)
*/
protected CompassSearchResults performSearch(CompassSearchCommand searchCommand, CompassSession session) {
long time = System.currentTimeMillis();
CompassQuery query = buildQuery(searchCommand, session);
CompassHits hits = query.hits();
CompassDetachedHits detachedHits;
CompassSearchResults.Page[] pages = null;
if (pageSize == null) {
doProcessBeforeDetach(searchCommand, session, hits, -1, -1);
detachedHits = hits.detach();
} else {
int iPageSize = pageSize;
int page = 0;
int hitsLength = hits.getLength();
if (searchCommand.getPage() != null) {
page = searchCommand.getPage();
}
int from = page * iPageSize;
if (from > hits.getLength()) {
// 如果起始的条目大于搜索到的条目
from = hits.getLength() - iPageSize;
doProcessBeforeDetach(searchCommand, session, hits, from, hitsLength);
detachedHits = hits.detach(from, hitsLength);
} else if ((from + iPageSize) > hitsLength) {
// 结束的条目大于搜索到的结果
doProcessBeforeDetach(searchCommand, session, hits, from, hitsLength);
detachedHits = hits.detach(from, hitsLength);
} else {
// 中间的页码，直接取出相应的条目
doProcessBeforeDetach(searchCommand, session, hits, from, iPageSize);
detachedHits = hits.detach(from, iPageSize);
}
doProcessAfterDetach(searchCommand, session, detachedHits);
int numberOfPages = (int) Math.ceil((float) hitsLength / iPageSize);
pages = new CompassSearchResults.Page[numberOfPages];
for (int i = 0; i < pages.length; i++) {
pages[i] = new CompassSearchResults.Page();
pages[i].setFrom(i * iPageSize + 1);
pages[i].setSize(iPageSize);
pages[i].setTo((i + 1) * iPageSize);
if (from >= (pages[i].getFrom() - 1) && from < pages[i].getTo()) {
pages[i].setSelected(true);
} else {
pages[i].setSelected(false);
}
}
if (numberOfPages > 0) {
CompassSearchResults.Page lastPage = pages[numberOfPages - 1];
if (lastPage.getTo() > hitsLength) {
lastPage.setSize(hitsLength - lastPage.getFrom());
lastPage.setTo(hitsLength);
}
}
}
time = System.currentTimeMillis() - time;
CompassSearchResults searchResults = new CompassSearchResults(detachedHits.getHits(), time, pageSize);
searchResults.setPages(pages);
return searchResults;
}
/**
* 构建Lucene搜索器.
*/
protected CompassQuery buildQuery(CompassSearchCommand searchCommand, CompassSession session) {
CompassQuery query = session.queryBuilder().queryString(searchCommand.getQuery().trim()).toQuery();
if (AdvancedSearchCommand.class.isAssignableFrom(searchCommand.getClass())) {
AdvancedSearchCommand advancedSearchCommand = (AdvancedSearchCommand) searchCommand;
for (CompassSort sort : advancedSearchCommand.getSortMap()) {
query.addSort(sort.getName(), sort.getType(), sort.getDirection());
}
}
return query;
}
/**
* 在detach 之前，可以做一些操作。比如highlighting...
*
* @param from 需要注意的是，如果pageSize 没有指定，那么这里传入的参数为-1
*/
protected void doProcessBeforeDetach(CompassSearchCommand searchCommand, CompassSession session, CompassHits hits,
int from, int size) {
if (AdvancedSearchCommand.class.isAssignableFrom(searchCommand.getClass())) {
if (from < 0) {
from = 0;
size = hits.getLength();
}
String[] highlightFields = ((AdvancedSearchCommand) searchCommand).getHighlightFields();
if (highlightFields == null) {
return;
}
// highlight fields
for (int i = from; i < size; i++) {
for (String highlightField : highlightFields) {
hits.highlighter(i).fragment(highlightField);
}
}
}
}
/**
* An option to perform any type of processing before the hits are detached.
*/
protected void doProcessAfterDetach(CompassSearchCommand searchCommand, CompassSession session,
CompassDetachedHits hits) {
}
public void afterPropertiesSet() throws Exception {
Assert.notNull(compass, "Must set compass property");
this.compassTemplate = new CompassTemplate(compass);
}
public Integer getPageSize() {
return pageSize;
}
public void setPageSize(Integer pageSize) {
this.pageSize = pageSize;
}
public void setCompass(Compass compass) {
this.compass = compass;
}
protected CompassTemplate getCompassTemplate() {
return this.compassTemplate;
}
8、Model层
@SearchableId 声明Document的id列；
@SearchableProperty 声明要索引的field；
@SearchableComponent 声明要索引的其他关联对象。
Article.java
package com.mobilesoft.esales.model;
import java.util.Date;
import org.compass.annotations.Searchable;
import org.compass.annotations.SearchableId;
import org.compass.annotations.SearchableProperty;
import org.compass.core.CompassTemplate;
@Searchable
public class Article implements java.io.Serializable {
@SearchableId
private Integer id;
@SearchableProperty(name="title")
private String title;
@SearchableProperty(name="author")
private Integer author;
@SearchableProperty(name="publishDate")
private Date publishDate;
/** default constructor */
public Article() {
}
/** minimal constructor */
public Article(String title, Date publishDate) {
this.title = title;
this.publishDate = publishDate;
}
/** full constructor */
public Article(String title, Integer author, Date publishDate) {
this.title = title;
this.author = author;
this.publishDate = publishDate;
}
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
public String getTitle() {
return this.title;
}
public void setTitle(String title) {
this.title = title;
}
public Integer getAuthor() {
return this.author;
}
public void setAuthor(Integer author) {
this.author = author;
}
public Date getPublishDate() {
return this.publishDate;
}
public void setPublishDate(Date publishDate) {
this.publishDate = publishDate;
}
}
Author.java
package com.mobilesoft.esales.model;
import org.compass.annotations.Searchable;
import org.compass.annotations.SearchableId;
import org.compass.annotations.SearchableProperty;
import org.compass.core.CompassTemplate;
@Searchable
public class Author implements java.io.Serializable {
@SearchableId
private Integer id;
@SearchableProperty(name="username")
private String username;
private String password;
@SearchableProperty(name="age")
private Short age;
public Author() {
}
/** minimal constructor */
public Author(String username, String password) {
this.username = username;
this.password = password;
}
/** full constructor */
public Author(String username, String password, Short age) {
this.username = username;
this.password = password;
this.age = age;
}
// Property accessors
public Integer getId() {
return this.id;
}
public void setId(Integer id) {
this.id = id;
}
public String getUsername() {
return this.username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return this.password;
}
public void setPassword(String password) {
this.password = password;
}
public Short getAge() {
return this.age;
}
public void setAge(Short age) {
this.age = age;
}
}
9、DAO层
ArticleDAO.java和AuthorDAO.java省略
直接用MyEclipse生成的，没有什么特别的。
10、参考文档
http://www.compass-project.org/docs/1.2.1/reference/html/
The Compass Framework Search made easy.pdf
Compass TSSJS Europe 06.pdf
Hello World Tutorial
InfoQ: Compass: Integrate Search into your apps
InfoQ: Compass: Simplifying and Extending Lucene to Provide Google-like Search
InfoQ: Compass: 在你的应用中集成搜索功能
Compass 指南
http://www.kimchy.org/
