用PHP调用Lucene包回实现全文检索
用PHP调用Lucene包来实现全文检索
[全文检索]用PHP调用Lucene包来实现全文检索
--------------------------------------------
http://www.chinaunix.net 作者:z33 发表于:2006-06-24 17:43:53
【发表评论】【查看原文】【Php讨论区】【关闭】
/*转贴请保留以下信息*/
作者:[url=http://spaces.msn.com/members/newbdez33/]张杰
URL:http://spaces.msn.com/members/newbdez33/
http://www.phpboom.com/
由于工作需要,需要使用PHP实现对网站内大量数量进行全文检索,
而且目前最流行的全文检索的搜索引擎库就是Lucene了,
它是Apache Jakarta的一个子项目,并且提供了简单实用的API,
用这些API,就可以对任何基本文本的数据(包括数据库)进行全文检索。
因为PHP本身就支持调用外部Java类,所以先用Java写了一个类,
这个类通过调用Lucene的API,实现了两个方法:
* public String createIndex(String indexDir_path,String dataDir_path)
* public String searchword(String ss,String index_path)
其中createIndex是创建索引方法,
传入了两个参数分别是indexDir_path(索引文件的目录),dataDir_path(被索引的文件目录),返回被索引的文件列表字符串,
另一个是searchword,通过传入的关键字参数(ss)对索引进行检索,index_path就是索引文件的目录。返回所有检索到的文件。
这里是源代码,很简单,大家可以参考一下:[url=http://newbdez33.googlepages.com/TxtFileIndexer.java]TxtFileIndexer.java
而PHP程序就调用这两个方法,实现对Lucene的调用,从而达到全文检索的目的。
PHP的调用方法如下:
先创建一个我们写的TxtFileIndexer类的实例,
$tf = new Java('TestLucene.TxtFileIndexer');
然后就按正常PHP类的调用方法的方式进行调用,首先创建索引:
$data_path = "F:/test/php_lucene/htdocs/data/manual"; //定义被索引内容的目录
$index_path = "F:/test/php_lucene/htdocs/data/search"; //定义生成的索引文件存放目录
$s = $tf->createIndex($index_path,$data_path); //调用Java类的方法
print $s; //打印返回的结果
这次再试试检索:
$index_path = "F:/test/php_lucene/htdocs/data/search"; //定义生成的索引文件存放目录
$s = $tf->searchword("here is keyword for search",$index_path);
print $s;
另外要注意Java类的路径,可以在PHP里设置
java_require("F:/test/php_lucene/htdocs/lib/"); //这是个例子,我的类和Lucene都放到这个目录下
这样就可以了,是不是很简单。
PHP源代码:[url=http://newbdez33.googlepages.com/test.php]test.php
接下来我把环境配置说一下,
首先需要有Java SDK,是必须的,我使用的是1.4.2版的,其它版本应该也没问题。
PHP5,试过PHP4,应该可以。
由于PHP5带的Java扩展没调通,并且以前用过调用Java效率很低,很慢,所以使用了 Php/Java Bridge 这个项目。
1.下载JavaBridge
URL:http://sourceforge.net/projects/php-java-bridge/
目前版本是
[url=http://prdownloads.sourceforge.net/php-java-bridge/php-java-bridge_3.0.8_j2ee.zip?download]php-java-bridge_3.0.8_j2ee.zip
解包后把
JavaBridge\WEB-INF\cgi\java-x86-windows.dll
JavaBridge\WEB-INF\lib\JavaBridge.jar
复制到 c:\php\ext 目录下,并把
java-x86-windows.dll 改名为 php_java.dll
2.修改php.ini(例)
extension=php_java.dll
[Java]
java.class.path = "C:\php\ext\JavaBridge.jar;F:\test\php_lucene\htdocs"
java.java_home = "C:\j2sdk1.4.2_10"
java.library.path = "c:\php\ext;F:\test\php_lucene\htdocs"
3.重启Apache即可。
4.可以找一些文件进行索引
在test.php里可以修改索引文件和数据文件的路径。
TxtFileIndexer.java的37行限制了只索引html后缀的文件,有需要也可以修改。
根据目前的情况(JavaBridge支持Linux和Freebsd),完全可以在
linux或freebsd/apache2/php4/lucene/JavaBridge
环境下运行。
本文章可能会随时更新,另外这里可以访问:
[url=http://newbdez33.googlepages.com/php_lucene]用PHP调用Lucene包来实现全文检索

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics











PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP and Python each have their own advantages and are suitable for different scenarios. 1.PHP is suitable for web development and provides built-in web servers and rich function libraries. 2. Python is suitable for data science and machine learning, with concise syntax and a powerful standard library. When choosing, it should be decided based on project requirements.
