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Liferay plugin开发入门

阅读更多

本篇部分引用以下文章:

http://daoger.iteye.com/blog/359826

 

首先下载liferay-tomcat-bundle和liferay-plugin-SDK,将其解压直系统任意目录。

进入liferay-plugin-SDK目录,新建plugin项目:

ant -Dportlet.name=<project name> -Dportlet.display.name="<portlet title>" create
 

新建Eclipse Java项目LiferayPlugin,将liferay-plugin-SDK解压后的目录拷贝至里面。将Liferay需要的jar加入环境变量(主要包括tomcat/webapps/ROOT/WEB-INF/lib和tomcat/common/lib/ext两个文件夹里面的jar)

 

在LiferayPlugin目根目录下,新建资源文件build.{username}.properties,这里的username是你的计算机用户名称。然后在build.{username}.properties文件中添加app.server.dir这一个属性,它的值指向tomcat的目录。

 

build新建的portlet项目,此后运行Liferay,就可在plugin中看见发布的portlet。

 

以下引用ipc-baseball-portlet.rar 中的部分源码:

 

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE web-app PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN" "http://java.sun.com/dtd/web-app_2_3.dtd">
<web-app>
    <listener>
        <listener-class>com.liferay.portal.kernel.spring.context.PortletContextLoaderListener</listener-class>
    </listener>
    <taglib>
        <taglib-uri>http://java.sun.com/jstl/core_rt</taglib-uri>
        <taglib-location>/WEB-INF/tld/c-rt.tld</taglib-location>
    </taglib>
</web-app>

 

<?xml version="1.0"?>
<portlet-app xmlns="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd" version="2.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd http://java.sun.com/xml/ns/portlet/portlet-app_2_0.xsd">
	<!-- <default-namespace>http://liferay.com/events</default-namespace> -->
	<portlet>
		<portlet-name>pitcher-portlet</portlet-name>
		<display-name>Pitcher Portlet</display-name>
		<portlet-class>com.liferay.ipc.PitcherPortlet</portlet-class>
		<init-param>
			<name>view-jsp</name>
			<value>/pitcher/view.jsp</value>
		</init-param>
		<expiration-cache>0</expiration-cache>
		<supports>
			<mime-type>text/html</mime-type>
		</supports>
		<portlet-info>
			<title>Pitcher Portlet</title>
			<short-title>Pitcher Portlet</short-title>
			<keywords>IPC Baseball Pitcher</keywords>
		</portlet-info>
		
		<security-role-ref>
			<role-name>administrator</role-name>
		</security-role-ref>
		<security-role-ref>
			<role-name>guest</role-name>
		</security-role-ref>
		<security-role-ref>
			<role-name>power-user</role-name>
		</security-role-ref>
		<security-role-ref>
			<role-name>user</role-name>
		</security-role-ref>
		
		<supported-publishing-event>
			<qname xmlns:x="http://liferay.com/events">x:ipc.pitch</qname>
		</supported-publishing-event>
	</portlet>
	
	<event-definition>
		<qname xmlns:x="http://liferay.com/events">x:ipc.pitch</qname>
		<value-type>java.lang.String</value-type>
	</event-definition>
</portlet-app>

 

/**
 * Copyright (c) 2000-2007 Liferay, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.liferay.ipc;

import java.io.IOException;
import java.util.Random;

import javax.portlet.ActionRequest;
import javax.portlet.ActionResponse;
import javax.portlet.GenericPortlet;
import javax.portlet.PortletException;
import javax.portlet.PortletRequestDispatcher;
import javax.portlet.ProcessAction;
import javax.portlet.RenderRequest;
import javax.portlet.RenderResponse;
import javax.xml.namespace.QName;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

/**
 * This portlet demonstrates the new Event model in JSR-286
 * that is used to achieve Inter-Portlet Communication. This portlet 
 * will "throw" an event out there for another portlet to catch. 
 *
 * @author Rich Sezov
 *
 */
public class PitcherPortlet extends GenericPortlet {
    public void init() throws PortletException {
        editJSP = getInitParameter("edit-jsp");
        helpJSP = getInitParameter("help-jsp");
        viewJSP = getInitParameter("view-jsp");
    }

    public void doDispatch(RenderRequest req, RenderResponse res) throws IOException, PortletException {
        String jspPage = req.getParameter("jspPage");

        if (jspPage != null) {
            include(jspPage, req, res);
        } else {
            super.doDispatch(req, res);
        }
    }

    public void doEdit(RenderRequest req, RenderResponse res) throws IOException, PortletException {
        if (req.getPreferences() == null) {
            super.doEdit(req, res);
        } else {
            include(editJSP, req, res);
        }
    }

    public void doHelp(RenderRequest req, RenderResponse res) throws IOException, PortletException {
        include(helpJSP, req, res);
    }

    public void doView(RenderRequest req, RenderResponse res) throws IOException, PortletException {
        include(viewJSP, req, res);
    }

    protected void include(String path, RenderRequest req, RenderResponse res) throws IOException, PortletException {
        PortletRequestDispatcher prd = getPortletContext().getRequestDispatcher(path);

        if (prd == null) {
            _log.error(path + " is not a valid include");
        } else {
            prd.include(req, res);
        }
    }

    /**
     * Since Portlet 2.0's GenericPortlet class lets you call methods 
     * from processAction via annotations, we don't even need to touch the 
     * processAction method to call our actions. 
     * 
     */
    @ProcessAction(name = "pitchBall")
    public void pitchBall(ActionRequest request, ActionResponse response) {
        String pitchType = null;
        // Send an Event that the ball has been pitched.
        Random random = new Random(System.currentTimeMillis());
        int pitch = random.nextInt(3) + 1;
        switch (pitch) {
            case 1:
                pitchType = "Fast Ball";
                break;
            case 2:
                pitchType = "Curve Ball";
                break;
            case 3:
                pitchType = "Slider";
                break;
            // should never print
            default:
                pitchType = "Screw Ball";
        }
        QName qName = new QName("http://liferay.com/events", "ipc.pitch");
        response.setEvent(qName, pitchType);
    }

    protected String editJSP;
    protected String helpJSP;
    protected String viewJSP;

    private static Log _log = LogFactory.getLog(PitcherPortlet.class);
}
 
<%
/**
 * Copyright (c) 2000-2008 Liferay, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
%>

<%@ taglib uri="http://java.sun.com/portlet" prefix="portlet" %>

<portlet:defineObjects />
<p>Click the link below to pitch the ball. </p>
<a href="<portlet:actionURL name="pitchBall"></portlet:actionURL>">Pitch!</a>
 
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