Liferay分页新闻列表（Journal Articles二次开发）

Liferay中自带了News的功能，可能是太高档了，到现在我都不是很清楚那个News功能的具体作用。

项目中需要用到新闻列表，只需要显示新闻标题，发布时间，有分页功能，可以通过标题上的链接查看新闻详细。

为了偷懒，就用Liferay的CMS中的Journal Articles即日志文章来实现。新闻可以通过CMS录入，这样我们在新增新闻的时候不仅可以指定新闻的类型，而且还可以通过Journal Articles现有的功能来配置显示的相关信息，同时还可以省掉新闻文章搜索的功能，方便不少哦。

好处很多，但是通常有一点达不到客户的要求，可能就需要重新开发，实际情况是Liferay中的Journal Articles并不带有分页功能。如何让他具备分页的功能呢？查看SOURCE决定在其现有的功能上扩展，保留其自身的功能作简单的配置即可。

一、目标：在Liferay的“增加内容”列表的新闻菜单下增加一个“日志新闻”的Portlet
打开liferay-display.xml文件，找到category.news的部分，新增一个id为journal_news的portlet，以下是修改后的代码

xml 代码

<category name="category.news">
    <portlet id="4" />
    <portlet id="5" />
    <portlet id="39" />
    <portlet id="journal_news" />
<!---->category>

上面的配置信息表示在种类为news的菜单下，有4个portlet可以供用户选择。现在增加了一个id为journal_news的portlet，实际上那只是配置上的设定，journal_news并没有实际存在。

二、打开liferay-portlet-ext.xml文件，新增portlet的配置信息，新增后如下：

xml 代码

<portlet>
        <portlet-name>journal_news<!---->portlet-name>
        <icon>/html/portlet/journal_articles/icon.png<!---->icon>
        <struts-path>journal_articles<!---->struts-path>
        <configuration-action-class>com.liferay.portlet.journalarticles.action.ConfigurationActionImpl<!---->configuration-action-class>
        <use-default-template>false<!---->use-default-template>
        <restore-current-view>false<!---->restore-current-view>
        <instanceable>true<!---->instanceable>
        <private-request-attributes>false<!---->private-request-attributes>
        <private-session-attributes>false<!---->private-session-attributes>
        <render-weight>0<!---->render-weight>
<!---->portlet>

可能有人看到了，上面的配置信息和journal_articles的配置几乎完全相同，只是名称换了一下。既然要使用journal_articles现有的功能，最简单的当然是直接依葫芦画瓢。

三、打开portlet-ext.xml文件，新增以下内容。

xml 代码

<portlet>
        <portlet-name>journal_news<!---->portlet-name>
        <display-name>Journal_News<!---->display-name>
        <portlet-class>com.liferay.portlet.StrutsPortlet<!---->portlet-class>
        <init-param>
            <name>view-action<!---->name>
            <value>/journal_articles/view_news<!---->value>
        <!---->init-param>
        <expiration-cache>0<!---->expiration-cache>
        <supports>
            <mime-type>text/html<!---->mime-type>
        <!---->supports>
        <resource-bundle>com.liferay.portlet.StrutsResourceBundle<!---->resource-bundle>
        <security-role-ref>
            <role-name>power-user<!---->role-name>
        <!---->security-role-ref>
        <security-role-ref>
            <role-name>user<!---->role-name>
        <!---->security-role-ref>
        <portlet-info>
            <title>Journal News<!---->title>
        <!---->portlet-info>
    <!---->portlet>

同样也是小的变动，只是view-action的value和title换掉了。其他的也还是和journal_articles一样。
实际上我们要做的只是在表现的JSP看到的效果不一样而已，重点要做的只是在JSP上。

四、struts-config-ext.xml和tiles-defs-ext.xml中增加view-action的相关设定。

struts-config-ext.xml中增加以下部分：

xml 代码

<!---->

        <action path="/journal_articles/view_news" type="com.liferay.portlet.journalarticles.action.ViewAction">
            <forward name="portlet.journal_articles.view" path="portlet.journal_articles.view.news" />
        <!---->action>

tiles-defs-ext.xml增加以下部分：

xml 代码

<!---->

    <definition name="portlet.journal_articles.view.news" extends="portlet">
        <put name="portlet_content" value="/portlet/journal_articles/view_news.jsp" />
    <!---->definition>

仅仅只是表现的JSP不同，其他功能继续沿用。

五、在${CATALINA_HOME}/WABAPPS/ROOT/HTML/portlet/journal_articles目录下新增view_news.jsp，你也可以在开发环境的相关目录中新增该文件，然后通过ANT工具部署到这个这个目录中去。

xml 代码

<%
/**
 * 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.
 */
%>
<%@ page import="com.liferay.portlet.journal.NoSuchArticleException"%>
<%@ include file="/html/portlet/journal_articles/init.jsp" %>

<%
String cur = ParamUtil.getString(request, "cur");
String articleId = ParamUtil.getString(request, "articleId");
boolean tag = Validator.isNull(articleId);
if(!cur.equals(""))
{
    //新增cur变量，根据该变量的取值来确定是否为分页操作
    tag=true;
}
double version = ParamUtil.getDouble(request, "version");
%>

<c:choose>
    <c:when test="<%= tag %>">

        <%
        if (Validator.isNull(type)) {
            type = null;
        }

        String status = "approved";

        PortletURL portletURL = renderResponse.createRenderURL();

        portletURL.setWindowState(WindowState.NORMAL);

        //相关path也做了同样的变动
        portletURL.setParameter("struts_action", "/journal_articles/view_news");

        ArticleSearch searchContainer = new ArticleSearch(renderRequest, portletURL);

        searchContainer.setDelta(pageDelta);

        List headerNames = searchContainer.getHeaderNames();

        headerNames.clear();
        //新闻列表不需要title，因此注释掉。
        //headerNames.add("name");
        //headerNames.add("display-date");
        //headerNames.add("author");

        searchContainer.setOrderableHeaders(null);

        ArticleSearchTerms searchTerms = (ArticleSearchTerms)searchContainer.getSearchTerms();

        searchTerms.setGroupId(groupId);
        searchTerms.setType(type);
        searchTerms.setStatus("approved");
        %>


<form action="<%=portletURL %>" method="post" name="
    <portlet:namespace>fm"</portlet:namespace>
    >

        <%@ include file="/html/portlet/journal/article_search_results.jspf" %>

        <%
        List resultRows = searchContainer.getResultRows();

        for (int i = 0; i < results.size(); i++) {
            JournalArticle article = (JournalArticle)results.get(i);

            ResultRow row = new ResultRow(article, article.getArticleId() + EditArticleAction.VERSION_SEPARATOR + article.getVersion(), i);

            String rowHREF = null;

            if (pageURL.equals("popUp")) {
                StringMaker sm = new StringMaker();

                sm.append(themeDisplay.getPathMain());
                sm.append("/journal_articles/view_article_content?groupId=");
                sm.append(article.getGroupId());
                sm.append("&articleId=");
                sm.append(article.getArticleId());
                sm.append("&version=");
                sm.append(article.getVersion());

                rowHREF = sm.toString();
            }
            else {
                portletURL.setParameter("groupId", String.valueOf(article.getGroupId()));
                portletURL.setParameter("articleId", article.getArticleId());
                portletURL.setParameter("version", String.valueOf(article.getVersion()));

                rowHREF = portletURL.toString();
            }

            String target = null;

            if (pageURL.equals("popUp")) {
                target = "_blank";;
            }

            TextSearchEntry rowTextEntry = new TextSearchEntry(SearchEntry.DEFAULT_ALIGN, SearchEntry.DEFAULT_VALIGN, article.getArticleId(), rowHREF, target, null);

            /*// Article id

            row.addText(rowTextEntry);

            // Version

            rowTextEntry = (TextSearchEntry)rowTextEntry.clone();

            rowTextEntry.setName(String.valueOf(article.getVersion()));

            row.addText(rowTextEntry);*/

            // Title

            rowTextEntry = (TextSearchEntry)rowTextEntry.clone();

            rowTextEntry.setName(article.getTitle());

            row.addText(rowTextEntry);

            // Display date

            rowTextEntry = (TextSearchEntry)rowTextEntry.clone();

            rowTextEntry.setName(dateFormatDateTime.format(article.getDisplayDate()));

            row.addText(rowTextEntry);

            // Author

            //rowTextEntry = (TextSearchEntry)rowTextEntry.clone();

            //rowTextEntry.setName(PortalUtil.getUserName(article.getUserId(), article.getUserName()));

            //row.addText(rowTextEntry);

            // Add result row

            resultRows.add(row);
        }
        %>

        <liferay-ui:search-iterator searchContainer="<%= searchContainer %>" />
        <!---->
        <liferay-ui:search-paginator searchContainer="<%= searchContainer %>" />
        <!---->form>
    <!---->c:when>
    <c:otherwise>

        <%
        String languageId = LanguageUtil.getLanguageId(request);

        String content = JournalArticleLocalServiceUtil.getArticleContent(groupId, articleId, version, languageId, themeDisplay);

        RuntimeLogic portletLogic = new PortletLogic(application, request, response, renderRequest, renderResponse);
        RuntimeLogic actionURLLogic = new ActionURLLogic(renderResponse);
        RuntimeLogic renderURLLogic = new RenderURLLogic(renderResponse);

        content = RuntimePortletUtil.processXML(request, content, portletLogic);
        content = RuntimePortletUtil.processXML(request, content, actionURLLogic);
        content = RuntimePortletUtil.processXML(request, content, renderURLLogic);
        %>

        <%= content %>
    <!---->c:otherwise>
<!---->c:choose>

做相关部署，重启服务器。。。附件中有view_news.jsp

• view_news.rar (2.3 KB)
• 描述: view_news.jsp
• 下载次数: 183

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• 2007-11-05 16:14
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2 楼 simpcity 2012-04-19  

  唉，看不懂啊。。。  能否分享一份源码出来啊

1 楼 lwgboy 2008-04-23