atleap----寻找切换多国语言的页面

atleap----寻找切换多国语言的页面 Tiles-config.xml

<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>

<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>

。。。。

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

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

controllerlang="EN-US" style="FONT-SIZE: 8pt; BACKGROUND: white; COLOR: #8080c0; FONT-FAMILY: 宋体; mso-font-kerning: 0pt; mso-hansi-font-family: 'Times New Roman'; mso-bidi-font-family: 宋体; mso-highlight: white"'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

// 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' />

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

<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>

<html:submit stylekey='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。