mainaction.java

此系统为我大家完全开发一个相册管理系统

/* ====================================================================
 * $Id$
 * ====================================================================
 *  文件名    MainAction.java
 *  机能名    
 *  履历      2005-1-30 dlxu 创建新文件  
 *           Copyright 2004 东南大学 All Rights Reserved
 * ====================================================================
 */
package cn.edu.seu.album.web;

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

import org.apache.log4j.Category;
import org.apache.log4j.Logger;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessages;

import cn.edu.seu.album.common.PJAction;
import cn.edu.seu.album.common.PJActionForm;
import cn.edu.seu.album.common.PJConst;
import cn.edu.seu.album.common.PJException;

/**
 * <p> [概 要] </p>
 * <p> [详 细] </p>
 * <p> [备 考] 无。</p>
 *
 * @author dlxu
 * @version 1.0 2005-1-30
 * @since 1.0
 */
public final class MainAction extends PJAction {

    /**
     * 取得日志。
     */
    private static final Category log = Logger.getInstance(MainAction.class);

    /**
     * 注销用户
     */
    private static final String ACTION_OUT = "logout";

    /**
     * <p> [概 要] </p>
     * <p> [详 细] </p>
     * <p> [备 考] 无。</p>
     * @param mapping
     * @param aForm
     * @param request
     * @param response
     * @param errs
     * @return
     * @throws PJException
     * @see cn.edu.seu.album.common.PJAction#doAction(org.apache.struts.action.ActionMapping, cn.edu.seu.album.common.PJActionForm, javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse, org.apache.struts.action.ActionMessages)
     */
    protected ActionForward doAction(ActionMapping mapping, PJActionForm aForm,
            HttpServletRequest request, HttpServletResponse response,
            ActionMessages errs) throws PJException {
        log.debug("doAction开始");

        try {
            ActionForward af = mapping.getInputForward();
            log.debug(aForm);

            MainForm form = (MainForm) aForm;
            String actionType = form.getActionType();

            if (ACTION_INIT.equals(actionType)) {
                doInit(form, errs, request);
            } else if (ACTION_OUT.equals(actionType)) {
                HttpSession session = request.getSession();
                session.invalidate();
                response.sendRedirect(request.getContextPath() + "/index.jsp");
                return null;
            } else {
                throw new PJException(PJConst.ACTION_TYPE_ERR);
            }

            log.debug("doAction结束");
            return af;
        } catch (PJException e) {
            throw e;
        } catch (Exception ex) {
            throw new PJException(ex);
        }
    }

    /**
     * <p> [概 要] </p>
     * <p> [详 细] </p>
     * <p> [备 考] 无。</p>
     * @param form
     * @param errs
     * @param request
     * @throws PJException
     */
    private void doInit(MainForm form, ActionMessages errs,
            HttpServletRequest request) throws PJException {
        log.debug("doInit开始");
        form.setOwner(form.getSessionBean().getPerson().getName());
        log.debug("doInit结束");
    }

}