atleap----寻找切换多国语言的页面

Tiles-config.xml

 

  <definition name=".coreLayout" path="/WEB-INF/pages/layouts/core/coreLayout.jsp">

        <put name="titleKey"/>

        <put name="content" />

        <putList name="leftLayoutBlocksList">

            <add value=".loginForm" />//左侧的登陆页面瓦片标志

            <add value=".core.menu" />//左侧的菜单瓦片标志

        </putList>

        <putList name="rightLayoutBlocksList">

           <add value=".searchForm" />//右侧全文搜索瓦片标志

           <add value=".switchLocaleForm" />//右侧多国语言支持瓦片标志

           <add value=".editModeForm" />//右侧的可编辑模式切换瓦片标志

        </putList>

 

 

。。。。

 

 

 <!-- Switch locale form definition -->

 <definition name=".switchLocaleForm" extends=".blockLayout"

//此处的name对应于以上的<add value=".switchLocaleForm" />

                controllerClass="com.blandware.atleap.webapp.action.core.contentLocale.LocaleListController">

//此处的class是用于处理switchLocaleForm所代表的页面请求的

<put name="blockBody" value="/WEB-INF/pages/core/contentLocale/switchLocaleForm.jsp" />

// switchLocaleForm真正所代表的JSP页面

    </definition>

 

此时，我们知道了页面中语言切换所对应页面是：

/WEB-INF/pages/core/contentLocale/switchLocaleForm.jsp

另外，该页面对应的处理页面是：

"com.blandware.atleap.webapp.action.core.contentLocale.LocaleListController"

 

Ø switchLocaleForm.jsp定义

 

 

<%@ include file="/WEB-INF/pages/common/taglibs.jsp"%>

<atleap:constants className="org.apache.struts.Globals" var="LOCALE_KEY" scope="page" />

<atleap:constants className="com.blandware.atleap.webapp.struts.ContentTilesRequestProcessor" var="PROCESSED_URL" />

<atleap:constants className="com.blandware.atleap.webapp.util.core.WebappConstants" var="LANGUAGES_COLLECTION_KEY" scope="page" />

 

<div id="switchLocaleForm" align="center">

    <html:form action="switchLocale" method="POST">

        <input type="hidden" name="redirectUrl" value="${requestScope[pageScope.PROCESSED_URL]}" />

        <span><atleap:label property="localeIdentifier"/></span><br />

        <span>

            <html:select property="localeIdentifier" value="${sessionScope[pageScope.LOCALE_KEY].language}">

                <html:options collection="${pageScope.LANGUAGES_COLLECTION_KEY}" property="value" labelProperty="label" />

            </html:select>

        </span>

        <div align="center">

            <html:submit styleClass="button"><bean:message key="button.change" /></html:submit>

        </div>

    </html:form>

</div>

 

Ø LocaleListController.java定义

public final class LocaleListController extends ControllerSupport {

     public void execute(ComponentContext tilesContext, HttpServletRequest request, HttpServletResponse response, ServletContext servletContext)

             throws Exception {

 

          WebApplicationContext ctx = WebApplicationContextUtils.getRequiredWebApplicationContext(servletContext);

          LookupManager lookupManager = (LookupManager) ctx.getBean(Constants.LOOKUP_MANAGER_BEAN);

          List localesList = lookupManager.listActiveContentLocales();

          request.setAttribute(WebappConstants.LANGUAGES_COLLECTION_KEY, localesList);

     }

}

 

其中在苏丹放松

<html:form action="switchLocale" method="POST">

 

switchLocale可以到structs-config.Xml中找到相关配置

 

    <action

      path="/switchLocale"

      type="com.blandware.atleap.webapp.action.core.contentLocale.SwitchLocaleAction"

      name="switchLocaleForm"

      scope="request"

      unknown="false"

      validate="false"

>

 

path="/switchLocale"所影射到的action 和 actionForm 是SwitchLocaleAction和switchLocaleForm。

 

 

SwitchLocaleForm。Java

 

public class SwitchLocaleForm extends BaseForm {

 

    protected String localeIdentifier;

    protected String redirectUrl;

 

    ……

 

    public void reset(ActionMapping mapping, HttpServletRequest request) {

    }

   public ActionErrors validate(ActionMapping mapping, HttpServletRequest request) {

        ActionErrors errors = new ActionErrors();

        return errors;

    }

}

 

 

SwitchLocaleAction。Java

 

public final class SwitchLocaleAction extends BaseAction {

 

    public ActionForward execute(ActionMapping mapping, ActionForm form,

                                 HttpServletRequest request, HttpServletResponse response) throws Exception {

 

        SwitchLocaleForm switchLocaleForm = (SwitchLocaleForm) form;

        Locale newLocale = new Locale(switchLocaleForm.getLocaleIdentifier());

        String redirectUrl = switchLocaleForm.getRedirectUrl();

        request.getSession().setAttribute(Globals.LOCALE_KEY, newLocale);

        ActionForward redirect = new ActionForward();

        redirect.setRedirect(true);

        redirect.setPath(redirectUrl);

        return redirect;

    }

}

到此为止，我们发现在这个action中，只做了将newLocal放到Session中，另外，redirect到自身去了，那么我们到底如何实现跳转页面采用用户选择的语言呢。

在atleap中，采用filter来截获每个request和response，通过配置文件web.xml中，

 

  <filter-name>actionFilter</filter-name>

      <filter-class>com.blandware.atleap.webapp.filter.ActionFilter</filter-class>

      <init-param>

         <param-name>isSecure</param-name>

         <param-value>false</param-value>

      </init-param>

   </filter>

其源码是：

 

public class ActionFilter implements Filter {

    private static Boolean secure = Boolean.FALSE;

    private final transient Log log = LogFactory.getLog(ActionFilter.class);

    private FilterConfig config = null;

 

………

 

    public void doFilter(ServletRequest req, ServletResponse resp,

                        FilterChain chain)

    throws IOException, ServletException {

        // cast to the types I want to use

        HttpServletRequest request = (HttpServletRequest) req;

        HttpServletResponse response = (HttpServletResponse) resp;

        HttpSession session = request.getSession(true);

       

        // notify the LocaleContextHolder what locale is being used so

        // service and data layer classes can get the locale

        LocaleContextHolder.setLocale(request.getLocale());

 

……

}

}

这样我们通过使用filter来处理各个请求和相应，从中设置国家语言,以方便service 和 Dao 层类调用。