localeaction.java

版本信息：Jaoso新闻文章发布系统 0.9.1beta1 原POPTEN新闻发布系统现更名为Jaoso,不兼容popten,目前不提供popten升级Jaoso的程序.

/*
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 1999 The Apache Software Foundation.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The end-user documentation included with the redistribution, if
 *    any, must include the following acknowlegement:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowlegement may appear in the software itself,
 *    if and wherever such third-party acknowlegements normally appear.
 *
 * 4. The names "The Jakarta Project", "Struts", and "Apache Software
 *    Foundation" must not be used to endorse or promote products derived
 *    from this software without prior written permission. For written
 *    permission, please contact [e-mail].
 *
 * 5. Products derived from this software may not be called "Apache"
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
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 * <http://www.apache.org/>.
 */
package jaoso.framework.web.action;

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

import org.apache.struts.Globals;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;

import java.util.Locale;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;


/**
 * Implementation of <strong>Action</strong> that
 * changes a locale based on request level parameters
 * that are set (language &amp; country).
 *
 * @author David Wintefeldt
*/
public final class LocaleAction extends Action {

    //~ Instance fields ========================================================

    /**
     * Commons Logging instance.
    */
    private Log log = LogFactory.getFactory()
                                .getInstance(this.getClass().getName());

    //~ Methods ================================================================

    /**
     * Process the specified HTTP request, and create the corresponding HTTP
     * response (or forward to another web component that will create it).
     * Return an <code>ActionForward</code> instance describing where and how
     * control should be forwarded, or <code>null</code> if the response has
     * already been completed.
     *
     * @param mapping The ActionMapping used to select this instance
     * @param form The optional ActionForm bean for this request (if any)
     * @param request The HTTP request we are processing
     * @param response The HTTP response we are creating
     *
     * @return Action to forward to
     * @exception Exception if an input/output error or servlet exception occurs
     */
    public ActionForward execute(ActionMapping mapping, ActionForm form,
        HttpServletRequest request, HttpServletResponse response)
        throws Exception {

        // Extract attributes we will need
        HttpSession session = request.getSession();
        Locale locale = getLocale(request);

        String language = null;
        String country = null;

        try {

            language = request.getParameter("language");
            country = request.getParameter("country");
        } catch (Exception e) {

            log.error(e.getMessage(), e);
        }

        if (((language != null) && (language.length() > 0))
                && ((country != null) && (country.length() > 0))) {

            locale = new java.util.Locale(language, country);
        } else if ((language != null) && (language.length() > 0)) {

            locale = new java.util.Locale(language, "");
        }

        session.setAttribute(Globals.LOCALE_KEY, locale);

        return mapping.findForward("success");
    }
}