【问题】
1、当我们一个页面存在多一个portlet的时候，如在不同的portlet之间传参？
【解决办法】
1、在liferay官方有几种方式，比较复杂麻烦，不是太实用，这里不再赘述。
2、通过friendlyurl后缀中用?param1=111的方式可以传参，但是如果我们把友好url修改了，也需要修改代码，不是很方便
3、那么还有一种方式，我们可以使用PortletURL来进行传参数
案例展示：
目前右边没有显示任何值
这里使用了是一个弹出框，其实关键就是其中的url，如果是从定向那么就会直接显示到当前页面中， 这是两个不同的portlet
【实例操作】
首先我们需要2个portlet，新建2个portlet，iframe-demo和url-params
首先我们初始化ifream的页面
<%@page import="com.liferay.portal.kernel.portlet.LiferayWindowState" %><%@ page language="java" contentType="text/html; charset=UTF-8"%><%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %><%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %><%@ taglib uri="http://liferay.com/tld/portlet" prefix="liferay-portlet" %><%@ taglib uri="http://liferay.com/tld/ui" prefix="liferay-ui" %> <portlet:defineObjects /><!-- 这个是用来定义一个参数 --><c:set var="basepath" value="${pageContext.request.contextPath }" /><script type="text/javascript" src="${basepath }/js/jQuery/jquery-1.12.3.min.js"> </script><!-- action是页面渲染之前跳转 --><portlet:actionURL var="iframeDemo" name="iframeDemo" windowState="<%=LiferayWindowState.POP_UP.toString() %>"> ???<portlet:param name="jspPage" value="/html/iframedemo/portletIframeDemo.jsp"/></portlet:actionURL><!-- 这个是已经确定页面了，之后的跳转 --><portlet:renderURL var="render1" /><!-- 跨portlet消息 plid为目标portlet所在的页面的id --><liferay-portlet:renderURL var="portletViewUrl" plid="${viewPild }" portletName="coudconfigportle_WAR_demoportlet" windowState="pop_up"> ???<liferay-portlet:param name="mvcPath" value="/html/coudconfigportle/view.jsp"/> ???<liferay-portlet:param name="portletValue1" value="${portletValue1 }"/></liferay-portlet:renderURL><style> ???.iframeDemoBox { ???????background:#dcdcdc; ???????height:100px; ?????????width:500px; ???} ???????.leftDiv { ???????float:left; ???????width:200px; ???} ???????.right_box { ???????float:right; ???????height:100px; ?????????width:250px; ???} ???</style><div class="iframeDemoBox"> ???<div class="leftDiv"> ???????<ul> ???????????<li><a href="javascript:iframeportlet()">portlet导航</a></li> ???????????<li><a href="javascript:iframejsp()">jsp导航</a></li> ???????????<li><a href="javascript:ajaxnav()">ajax导航</a></li> ???????</ul> ???</div> ???<div class="right_box"> ???????<iframe id="demo_iframe" height="100px" width="250px" ></iframe> ???</div></div><br><div> ???<ul> ???????<li>portlet之间传值demo:<input id="betweenPortletPlid" type="button" class="btn-info" value="${demo }" /></li> ???????<li>portlet之间传值plid:<input id="betweenPortletPlid" type="button" class="btn-info" value="${viewPild }" /></li> ???????<li>portlet之间传值:<input id="betweenPortletValue" type="text" class="btn" /></li> ???</ul></div><br/><input type="text" class="btn-info" value="${render1 }" size="100px"/><br>plid:${viewPild } <br/>url:${portletViewUrl} <br/>portletName=${portletName } <br/> portletValue1=${portletValue1 }<br/><br/>urljava:${viewUrl} <br/><liferay-ui:icon image="view" url="${viewUrl}" useDialog="true" /><br/>第二个使用标签进行设置url:<liferay-ui:icon image="view" url="${portletViewUrl}" useDialog="true" /><br/><script> ???function iframeportlet(){ ???????$(‘#demo_iframe‘).attr(‘src‘,‘${iframeDemo}‘); ???} ???function iframejsp(){ ???????var url = ‘${basepath}/html/iframedemo/jspdemo.jsp‘; ???????$(‘#demo_iframe‘).attr(‘src‘,url); ???} ???????function ajaxnav(){ ???????//演示环境，一个页面，所以先将IFrame元素移除 ???????$(‘#right_box iframe‘).remove(); ???????var url = ‘${basepath}/html/iframedemo/ajax.jsp‘; ???????$.get(url,function(data){ ???????????$(‘#right_box‘).html(data); ???????}) ???} ???????function ajax1() { ???????window.location = "${render1}?betweenPortletValue=" + $("#betweenPortletValue").val(); ???} ???????????function openNew() { ???????//获取页面body！内容！的高度和宽度 ???????var sHeight = document.documentElement.scrollHeight; ???????var sWidth = document.documentElement.scrollWidth; ???????//获取可视区域高度，宽度与页面内容的宽度一样 ???????var wHeight = document.documentElement.clientHeight; ???????//创建遮罩层div并插入body ???????var oMask = document.createElement("div"); ???????oMask.id = "mask"; ???????oMask.style.height = sHeight + "px"; ???????//宽度直接用100%在样式里 ???????document.body.appendChild(oMask); ???????//创建登录层div并插入body ???????var oLogin = document.createElement("div"); ???????oLogin.id = "login"; ???????oLogin.innerHTML = "<div class=‘loginCon‘><div id=‘close‘></div></div>" ???????document.body.appendChild(oLogin); ???????//获取login的宽度和高度并设置偏移值 ???????var dHeight = oLogin.offsetHeight; ???????var dWidth = oLogin.offsetWidth; ???????oLogin.style.left = (sWidth - dWidth) / 2 + "px"; ???????oLogin.style.top = (wHeight - dHeight) / 2 + "px"; ???????//获取关闭按钮 ???????var oClose = document.getElementById("close"); ???????oMask.onclick = oClose.onclick = function() { ???????????document.body.removeChild(oMask); ???????????document.body.removeChild(oLogin); ???????} ???}</script>ifream后台代码
package com.xiaof.Iframe;import java.io.IOException;import javax.portlet.ActionRequest;import javax.portlet.ActionResponse;import javax.portlet.PortletException;import javax.portlet.PortletRequest;import javax.portlet.PortletURL;import javax.portlet.RenderRequest;import javax.portlet.RenderResponse;import com.liferay.portal.kernel.log.Log;import com.liferay.portal.kernel.log.LogFactoryUtil;import com.liferay.portal.kernel.util.WebKeys;import com.liferay.portal.theme.ThemeDisplay;import com.liferay.portlet.PortletURLFactoryUtil;import com.liferay.util.bridges.mvc.MVCPortlet;/** * Liferay中左右布局的示例 * iframe */public class IframeDemo extends MVCPortlet { ???????private final static String WAR = "_WAR_"; ???private static Log log = LogFactoryUtil.getLog(IframeDemo.class); ???????@Override ???public void doView(RenderRequest renderRequest, ???????????RenderResponse renderResponse) throws IOException, PortletException { ???????// TODO Auto-generated method stub ???????//获取对应的portlet的plid ???????log.debug("测试"); ???????ThemeDisplay themeDisplay = (ThemeDisplay)renderRequest.getAttribute(WebKeys.THEME_DISPLAY); ???????long viewPild = themeDisplay.getPlid();// ???????viewPild = PortalUtil.getPlidFromFriendlyURL(themeDisplay.getCompanyId(), "/web/xiaof/configportlet");// ???????renderRequest.setAttribute("viewPild", viewPild); ???????//portletName为目标Portlet的名称，这个名称的规则是固定的，以_WAR_分割， ???????//前面是portlet.xml里面的portletname，后面为当前portlet所在的工程名称，如果news-portlet， ???????//这里就是newsportlet，如果是CMS-portlet，这里就是CMSportlet。 ???????//coudconfigportle_WAR_demoportlet ??urlparams_WAR_demoportlet ???????String portletName = "urlparams_WAR_demoportlet";// ???????renderRequest.setAttribute("portletName", portletName);// ???????renderRequest.setAttribute("portletValue1", "portletValue1"); ???????????????PortletURL viewUrl = PortletURLFactoryUtil.create(renderRequest, portletName, viewPild, PortletRequest.RENDER_PHASE); ???????viewUrl.setParameter("portletValue1", "mytest11"); ???????????????System.out.println("请求的url:" + viewUrl.toString()); ???????????????renderRequest.setAttribute("viewUrl", viewUrl.toString()); ???????????????super.doView(renderRequest, renderResponse); ???} ???public void iframeDemo(ActionRequest actionRequest,ActionResponse actionResponse) { ???????actionRequest.setAttribute("demo", "这是portlet的iframe");// ???????UrlConfigLocalServiceUtil. ???} ???}注意，这个代码中的
plid是页面id，在layout表
接下来我们看看获取参数的portlet
UrlParamsPortlet
package com.xiaof.urlparam;import java.io.IOException;import java.util.Enumeration;import javax.portlet.PortletException;import javax.portlet.RenderRequest;import javax.portlet.RenderResponse;import javax.servlet.http.HttpServletRequest;import com.liferay.portal.util.PortalUtil;import com.liferay.util.bridges.mvc.MVCPortlet;/** * Portlet implementation class UrlParamsPortlet */public class UrlParamsPortlet extends MVCPortlet { ????@Override ???public void doView(RenderRequest renderRequest, ???????????RenderResponse renderResponse) throws IOException, PortletException { ???????//获取url参数 portletValue1 ?_coudconfigportle_WAR_demoportlet_portletValue1 ???????String param1 = renderRequest.getParameter("portletValue1"); ???????renderRequest.setAttribute("param1", param1); ???????// ???????Enumeration<String> enumerations = ?renderRequest.getAttributeNames();// ???????while(enumerations.hasMoreElements()) {// ???????????String temp = enumerations.nextElement();// ???????????System.out.println("Enumeration[" + temp + ":" + renderRequest.getAttribute(temp));// ???????} ???????????????HttpServletRequest requestPortlet = PortalUtil.getHttpServletRequest(renderRequest); ???????String param2 = (String) requestPortlet.getParameter("portletValue1"); ???????requestPortlet.setAttribute("param2", param2); ???????????????//原生http ???????HttpServletRequest request = PortalUtil.getOriginalServletRequest(requestPortlet); ???????String param3 = (String) request.getParameter("portletValue1"); ???????request.setAttribute("param3", param3); ???????System.out.println("UrlParamsPortlet:\nparam1:" + param1 + "\nparam2:" + param2 + "\nparam3:" + param3); ???????????????super.doView(renderRequest, renderResponse); ???}}页面
<%@ taglib uri="http://java.sun.com/portlet_2_0" prefix="portlet" %><%@ page language="java" contentType="text/html; charset=UTF-8"%><portlet:defineObjects /><h1>测试url传参数的portlet</h1>参数:<br/><b>param1</b>:${param1 }<br/><b>param2</b>:${param2 }<br/><b>param3</b>:${param3 }<br/>最后：代码sdk项目已经上传到码云，有兴趣的同学可以下载下来看看：https://gitee.com/cutterPpoint/liferay
【liferay】5、使用PortletURL进行跨portlet通信 liferay6.2
原文地址：https://www.cnblogs.com/cutter-point/p/8400294.html