Java tutorial
/* * Copyright (c) 2007 NTT DATA Corporation * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package jp.terasoluna.fw.web.struts.actions; import java.io.IOException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import jp.terasoluna.fw.exception.SystemException; import jp.terasoluna.fw.util.PropertyUtil; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; /** * P?tH??[hANV?B * * <p> * ActionEx@\?iJ?O?o?EgUNVg?[N`FbN?jp??A * JSPtH??[hANV?B * StrutsForwardActionl * struts-config.xml<action>vf * parameter?w?tH??[h?B * parameter?????A * _?tH??[h?usuccess?vANVtH??[h?B * tH??[h?????A * SC_NOT_FOUND?i404?jG?[?B * *.jspt@C?ANZX~???A * JSP??oP?\ * ANVpstruts-config.xml * Gg??Kv?B * ActionEx#execute()?s???A * p??B * </p> * *<br> * * <p>Bean`t@Cystruts-config.xmlL?q?B</p> * * :<br> * <p> * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <legend><strong>Bean`t@C?</strong></legend> * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <code><pre> * <bean name="/foo" scope="prototype" * <strong>class="jp.terasoluna.fw.web.struts.actions.ForwardAction"</strong>> * </bean> * </pre></code> * </fieldset> * </fieldset> * </p> * * <p> * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <legend><strong>struts-config.xml?</strong></legend> * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <code><pre> * <action path="/foo" * parameter="/foo.jsp"> * </action> * </pre></code> * </fieldset> * * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <code><pre> * <action path="/foo" * parameter="/foo.jsp"> * <forward name="success" path="/foo.jsp" module="/sub1" redirect="true"> * </action> * </pre></code> * </fieldset> * </fieldset> * </p> * *<br> * * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <legend><strong>contextRelativetB?[h</strong></legend> * <strong>parameter?</strong>pXw@?X?B * * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <legend><strong>contextRelative?lpXw@</strong></legend> * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <legend><strong>true</strong>??</legend> * parameter??AReLXg?[g?pXw?B<br> * {IW?[Jgp?B * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <code><pre> * <action path="/pagelinkForward" * parameter="<strong>/pagelink/</strong>sc2401.jsp"/> * </pre></code> * </fieldset> * </fieldset> * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <legend><strong>false</strong>??</legend> * parameter??AW?[pXw?s?B<br> * W?[J_CNg?s???A * <forward>vfgp?B * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <code><pre> * <action path="/pagelinkForward" * parameter="<strong>/</strong>sc2401.jsp"/> * </pre></code> * </fieldset> * </fieldset> * </fieldset> * * * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <legend><strong>contextRelative?@</strong></legend> * system.properties?L?q?B<br> * ???? <strong>false</strong> ?B<br> * <fieldset style="border:1pt solid black;padding:10px;width:100%;"> * <legend><strong>system.properties</strong></legend> * <code><pre> * forwardAction.contextRelative=true * </pre></code> * </fieldset> * </fieldset> * </fieldset> * *<br> * */ public class ForwardAction extends ActionEx { /** * ?ONX?B */ private static Log log = LogFactory.getLog(ForwardAction.class); /** * G?[y?[W?i404?jJsG?[R?[h?B */ private static final String FORWARD_ERRORPAGE_ERROR = "error.forward.errorpage"; /** * _?tH??[h?B */ private static final String FORWARD_SUCCESS = "success"; /** * contextRelative?lv?peBL?[ */ private static final String FORWARD_ACTION_CONTEXT_RELATIVE_KEY = "forwardAction.contextRelative"; /** * parameter??J? * ANVtH??[hZbg?B * parameter?????A * J?_?tH??[h"success" * ANVtH??[h?B * ????A?i404?jG?[?B * * @param mapping ANV}bsO * @param form ANVtH?[ * @param req HTTPNGXg * @param res HTTPX|X * @return J?ANVtH??[h */ @SuppressWarnings("deprecation") @Override public ActionForward doExecute(ActionMapping mapping, ActionForm form, HttpServletRequest req, HttpServletResponse res) { if (log.isDebugEnabled()) { log.debug("doExecute() called."); } // parameter??itH??[h??j String path = mapping.getParameter(); // ANVtH??[h?? ActionForward retVal = null; if (path == null) { // ActionMappingActionForward retVal = mapping.findForward(FORWARD_SUCCESS); // ActionFoward??? if (retVal == null) { // parameter??Aforwardvf????A // ?i404?jG?[p try { res.sendError(HttpServletResponse.SC_NOT_FOUND); } catch (IOException e) { log.error("Error page(404) forwarding failed."); throw new SystemException(e, FORWARD_ERRORPAGE_ERROR); } return null; } return retVal; } retVal = new ActionForward(path); // contextRelative?l String contextRelativeStr = PropertyUtil.getProperty(FORWARD_ACTION_CONTEXT_RELATIVE_KEY, Boolean.FALSE.toString()); Boolean contextRelative = new Boolean(contextRelativeStr); // ActionForwardcontextRelativel? retVal.setContextRelative(contextRelative); if (log.isDebugEnabled()) { StringBuilder debugLog = new StringBuilder(); debugLog.append("contextRelative:"); debugLog.append(contextRelative); log.debug(debugLog.toString()); } return retVal; } }