Lucene Search in Liferay

Today we will see how to use Lucene Search in Liferay. For this i create a simple portlet which can search journal Articles on the basis of title.

So lets start this Step by Step:-

Step 1:-Create a project and portlet

Create a project and then create a portlet in it .Here my project name is  lucene-portlet and portlet name is Demo. 

Step 2:-Change the jsp

Change your view.jsp as:-

view.jsp

	<%@page import="java.util.Locale"%>
	<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %>
	<%@ taglib uri="http://liferay.com/tld/aui" prefix="aui" %>
	<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
	<portlet:defineObjects />
	<portlet:actionURL var="searchURL" name="searchArticle"/>
	<aui:form action="${searchURL}" method="POST">
	<aui:input name="keyword" label="Search Article"/>
	<aui:button type="submit" value="Search" />
	</aui:form>

view raw view.jsp hosted with ❤ by GitHub

Explanation:-

Here i create a simple form with only one text field and a submit button. By using the text field we send the keyword for search.

Step 3:-Change the Controller

Now change your Demo.java:-

Demo.java

	package com.test;
	import java.util.List;
	import javax.portlet.ActionRequest;
	import javax.portlet.ActionResponse;
	import com.liferay.portal.kernel.search.BooleanQuery;
	import com.liferay.portal.kernel.search.BooleanQueryFactoryUtil;
	import com.liferay.portal.kernel.search.Document;
	import com.liferay.portal.kernel.search.Field;
	import com.liferay.portal.kernel.search.Hits;
	import com.liferay.portal.kernel.search.SearchContext;
	import com.liferay.portal.kernel.search.SearchContextFactory;
	import com.liferay.portal.kernel.search.SearchEngineUtil;
	import com.liferay.portal.kernel.search.SearchException;
	import com.liferay.portal.kernel.util.ParamUtil;
	import com.liferay.portal.util.PortalUtil;
	import com.liferay.portlet.journal.model.JournalArticle;
	import com.liferay.util.bridges.mvc.MVCPortlet;
	public class Demo extends MVCPortlet {
	public void searchArticle(final ActionRequest request, final ActionResponse response) {
	String keyword = ParamUtil.getString(request, "keyword");
	SearchContext searchContext = SearchContextFactory.getInstance(PortalUtil.getHttpServletRequest(request));
	BooleanQuery searchQuery = BooleanQueryFactoryUtil.create(searchContext);
	searchQuery.addRequiredTerm(Field.ENTRY_CLASS_NAME, JournalArticle.class.getName());
	searchQuery.addRequiredTerm(Field.TITLE, keyword);
	searchQuery.addRequiredTerm("head", Boolean.TRUE);
	try {
	Hits hits = SearchEngineUtil.search(searchContext, searchQuery);
	List<Document> docList = hits.toList();
	for (Document document : docList) {
	System.out.println("Article Id=> " + document.get("articleId"));
	System.out.println("Content =>" + document.get(Field.CONTENT));
	}
	} catch (SearchException e) {
	e.printStackTrace();
	}
	}
	}

view raw Demo.java hosted with ❤ by GitHub

Explanation:-
Here i use Boolean Query and apply some conditions like:-
1)line 28 :- Search on JournalArticle class
2)line 29 :- Title must match with the Keyword.
3)line 30 :- Fetch only Latest Articles.

Step 4:-Check the Output

Now deploy the portlet and check the output . When you enter some text in text box it will get the articles that contain the required title.

You can download the source code from here.

Hope this will Help....

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