搜索引擎 apache-solr

刺骨的言语ヽ痛彻心扉 2022-09-30 14:48 202阅读 0赞

SOLR

**1.Solr server setup**

l **Java environment setup**

Download linux JDK 6 from this website :

http://java.sun.com/javase/downloads/index.jsp

After installing JDK, edit /ect/profile , add these code to the end of the file

JAVA\_HOME=/usr/java/jdk1.6.0\_16

PATH=$JAVA\_HOME/bin:$PATH

CLASSPATH=.:$JAVA\_HOME/lib/dt.jar:$JAVA\_HOME/lib/tools.jar

export JAVA\_HOME

export PATH

export CLASSPATH

/usr/java/jdk1.6.0\_16 is the folder of the jdk. You should change it ,if you don’t install jdk in this folder.

l  **Solr setup**

1.Download solr (apache-solr-1.3.0.zip ) from this website:

[http://ftp.kddilabs.jp/infosystems/apache/lucene/solr/][http_ftp.kddilabs.jp_infosystems_apache_lucene_solr]

2.Install solr with following steps

#unzip -q apache-solr-1.3.0.zip

#cd apache-solr-1.3.0/example/

# java -jar start.jar

we can see that the Solr is running by loading http://localhost:8983/solr/admin/ in web browser. This is the main starting point for Administering Solr.

# This is tutorial of solr http://lucene.apache.org/solr/tutorial.html. #

**2.Search Apach solr with php.**

This is a tutorial of php solr client example:

[http://www.ibm.com/developerworks/opensource/library/os-php-apachesolr/][http_www.ibm.com_developerworks_opensource_library_os-php-apachesolr]

We use PHP Solr Client to access to solr server . Download PHP Solr Client from this website: [http://code.google.com/p/solr-php-client/downloads/list][http_code.google.com_p_solr-php-client_downloads_list]

l **Change default Solr index data schema.**

Solr index data schema is in the folder of “apache-solr-1.3.0/example/solr/conf/ schema.xml”

This is the snippet of solr schema.

...

...

</fields>

...

...

</schema>

Edit the field element , change it as below:

<defaultSearchField>product\_name</defaultSearchField>

To make this change active ,we have to restart Solr server as command like this:

\#java -jar start.jar

l **Create index by PHP**

using php solr client , we can access to Solr easily.This is an example fo how to create an index by php.

<?php

require\_once 'Apache/Solr/Service.php';

//10.60.0.111 is solr service ip.

$solr=new Apache\_Solr\_Service('10.60.0.111','8983','/solr');

if (!$solr->ping())

echo("service not responding");

else

echo("solr Service is available ");

$parts=array(

'1'=>array(

'id'=>'a123',

'product\_name'=>'garoon，test'

'2'=>array(

'id'=>'a456',

'product\_name'=>'share360,test'

)

);

$documents = array();

foreach ( $parts as $item => $fields ) \{

$part = new Apache\_Solr\_Document();

foreach ( $fields as $key => $value ) \{

if ( is\_array( $value ) ) \{

foreach ( $value as $datum ) \{

$part->setMultiValue( $key, $datum );

else \{

$part->$key = $value;

$documents\[\] = $part;

try \{

$solr->addDocuments( $documents );

$solr->commit();

$solr->optimize();

catch ( Exception $e ) \{

echo $e->getMessage();

l **Search index by PHP .**

This is an example of searching index by php

<?php

require\_once 'Apache/Solr/Service.php';

$solr=new Apache\_Solr\_Service('10.60.0.111','8983','/solr');

if (!$solr->ping())

echo("service not responding");

else

echo("sucess");

$offset = 0;

$limit = 10;

$query="garoon";

$response=$solr->search($query,$offset,$limit);

if ($response->getHttpStatus()==200)

if ( $response->response->numFound > 0 ) \{

echo "$query ";

foreach ( $response->response->docs as $doc )

echo "id: ".$doc->id."product\_name ".$doc->product\_name. "--";

echo ' ';

else \{

echo $response->getHttpStatusMessage();

l **delete index by PHP**

<?php

require\_once 'Apache/Solr/Service.php';

//10.60.0.111 is solr service ip.

$solr=new Apache\_Solr\_Service('10.60.0.111','8983','/solr');

if (!$solr->ping())

echo("service not responding ");

else

echo("solr Service is available ");

$response=$solr->deleteById("a123");

echo($response->getHttpStatusMessage());

l  **update index by PHP**

If we want to update a document to index , there are two methods to resolve it :

Method 1: delete the document by id, and then add an new one to index.

Method 2: use the add method to directly add the document to index , because id is an indentify field, Solr server will use new document to cover the old one.

如何使Solr支持中文，日文和英文的全文搜索呢。apache提供提供了一个 cjk库函数供我们使用，具体使用参考：http://chaifeng.com/blog/2008/01/\_apache\_solr.html

默认情况下 Apache Solr 是不支持中文检索的，如果文档中包含中文，必须用完整的一句中文才能检索出内容。 
下面以 Apache Solr 的演示程序为例，注意：粗体部分是需要修改的地方。 
找到如下三行： 
<fieldType name="text" class="**solr.TextField**" **positionIncrementGap="100"**> 
<analyzer type="index"> 
<tokenizer class="**solr.WhitespaceTokenizerFactory**"/> 
修改为： 
<fieldType name="text" class="solr.TextField"> 
<analyzer type="index" **class="org.apache.lucene.analysis.cjk.CJKAnalyzer"**> 
<tokenizer class="**org.apache.lucene.analysis.cjk.CJKTokenizer**"/> 
找到如下两行： 
<analyzer type="query"> 
<tokenizer class="**solr.WhitespaceTokenizerFactory**"/> 
修改为： 
<analyzer type="query" **class="org.apache.lucene.analysis.cjk.CJKAnalyzer"**> 
<tokenizer class="**org.apache.lucene.analysis.cjk.CJKTokenizer**"/> 
修改完毕，重新运行 Apache Solr 就可以对中文进行检索了，原先已经导入的文档需要重新导入。 
记住原先的配置中有个 **positionIncrementGap="100"** 一定要删除了，否则会有异常。

注意：如果是php编程，一定要让程序代码的编码格式为utf-8编码形式，不然创建索引会失败。

[http_ftp.kddilabs.jp_infosystems_apache_lucene_solr]: http://ftp.kddilabs.jp/infosystems/apache/lucene/solr/
[http_www.ibm.com_developerworks_opensource_library_os-php-apachesolr]: http://www.ibm.com/developerworks/opensource/library/os-php-apachesolr/
[http_code.google.com_p_solr-php-client_downloads_list]: http://code.google.com/p/solr-php-client/downloads/list