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 [Java Open Source]一个简单的COMPASS应用
软件技术, 电脑与网络
lhwork 发表于 2006/6/29 14:07:33 |
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首先你要下载Compass framework: Download Compass. 你需要在你的class path 中添加4个jarcompass-0.8.1/modules/core/compass-core-0.8.1.jar,
compass-0.8.1/modules/core/lib/commons-logging-1.0.4.jar,
compass-0.8.1/modules/core/lib/log4j-1.2.8.jar,
compass-0.8.1/modules/core/lib/lucene-core-1.9-rc1-dev.jar. 在你的项目中创建下面的目录(可以根据自己的定义来改动)：log4j.properties - org - compassframework - sample - example alias.cmd.xml compass.cfg.xml CompassExample.java Phrase.cpm.xml Phrase.java 下面说一下几个重要的配置文件 compass.cfg.xmlcode指定的target/index 是一个存储目录放索引文件的<!DOCTYPE compass-core-configuration PUBLIC"-//Compass/Compass Core Configuration DTD 1.0//EN""http://static.compassframework.org/dtd/compass-core-configuration-1.0.dtd"><compass-core-configuration><compass><setting name="compass.engine.connection">target/index</setting><meta-data resource="org/compassframework/sample/example/alias.cmd.xml" /></compass></compass-core-configuration> alias.cmd.xml:<?xml version="1.0"?><!DOCTYPE compass-core-meta-data PUBLIC "-//Compass/Compass Core Meta Data DTD 1.0//EN""http://static.compassframework.org/dtd/compass-core-meta-data-1.0.dtd"><compass-core-meta-data><meta-data-group id="example" displayName="Example Meta Data"><description>Example Meta Data</description><uri>http://compass/example</uri><alias id="phrase" displayName="Phrase"><description>Phrase alias</description><uri>http://compass/example/phrase</uri><name>phrase</name></alias><meta-data id="author" displayName="Author"><description>Author alias</description><uri>http://compass/example/author</uri><name>author</name></meta-data><meta-data id="text" displayName="Text"><description>Text alias</description><uri>http://compass/example/text</uri><name>text</name></meta-data></meta-data-group></compass-core-meta-data>Phrase.java （这个类必须有个无参数的构造和id属性）package org.compassframework.sample.example;public class Phrase { private String author; private String text; private Long id; public Phrase() { } public String getAuthor() { return author; } public void setAuthor(String author) { this.author = author; } public String getText() { return text; } public void setText(String text) { this.text = text; } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String toString() { return text; }} Phrase.cpm.xml<?xml version="1.0"?><!DOCTYPE compass-core-mapping PUBLIC "-//Compass/Compass Core Mapping DTD 1.0//EN""http://static.compassframework.org/dtd/compass-core-mapping-1.0.dtd"><compass-core-mapping package="org.compassframework.sample.example"><class name="Phrase" alias="${example.phrase}"><id name="id" /><property name="author"><meta-data>${example.author}</meta-data></property><property name="text"><meta-data>${example.text}</meta-data></property></class></compass-core-mapping>CompassExample.javapackage org.compassframework.sample.example;import org.apache.log4j.Logger;import org.compassframework.core.Compass;import org.compassframework.core.CompassHits;import org.compassframework.core.CompassSession;import org.compassframework.core.CompassTransaction;import org.compassframework.core.config.CompassConfiguration;public class CompassExample { private static final Logger logger = Logger.getLogger(CompassExample.class); private Compass compass; public static void main(String[] args){ new CompassExample().process(); } private void process(){ CompassConfiguration config = new CompassConfiguration(); config.configure("org/compassframework/sample/example/compass.cfg.xml"); config.addClass(Phrase.class); compass = config.buildCompass(); compass.getSearchEngineIndexManager().deleteIndex(); compass.getSearchEngineIndexManager().createIndex(); createIndex(); search("mule AND crazy"); search("Marisol OR Ramon"); } private void createIndex(){ CompassSession session = compass.openSession(); CompassTransaction tx = session.beginTransaction(); Phrase phrase = new Phrase(); phrase.setAuthor("Joe"); phrase.setText("I don't think it's nice you laughing. " + "You see my mule don't like people laughing. " + "He gets the crazy idea you're laughing at him. " + "Now if you apologize like I know you're going to, " + "I might convince him that you really didn't mean it..."); phrase.setId(new Long(1)); session.save(phrase); tx.commit(); session.close(); } private void search(String query){ CompassSession session = compass.openSession(); CompassTransaction tx = session.beginTransaction(); CompassHits hits = session.find(query); if (logger.isDebugEnabled()) { logger.debug("search() - Found " + hits.getLength()+" hits for \""+query+"\""); } for (int i = 0; i < hits.getLength(); i++) { print(hits, i); } hits.close(); tx.commit(); session.close(); compass.close(); } private void print(CompassHits hits, int hitNumber) { Phrase value = (Phrase)hits.data(hitNumber); if (logger.isDebugEnabled()) { logger.debug("print() - Phrase by " + value.getAuthor() + ": " + value.getText()); } }}为了保证能打印出我们的测试，需要加入log4j.properties ：log4j.rootLogger=ERROR, stdout log4j.appender.stdout=org.apache.log4j.ConsoleAppender log4j.appender.stdout.layout=org.apache.log4j.PatternLayout log4j.appender.stdout.layout.ConversionPattern=%d %p %c - %m%n log4j.logger.org.compassframework.sample.example=DEBUG 下面是打印出来的测试结果：search() - Found 1 hits for "mule AND crazy" print() - Phrase by Joe: I don't think it's nice you laughing...search() - Found 0 hits for "Marisol OR Ramon" |
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