viewaction.java

java电子相册一般网页里面实现图片切换的这个电子相册的代码

/* ====================================================================
 * $Id$
 * ====================================================================
 *  文件名    ViewAction.java
 *  机能名    
 *  履历      2005-3-3 dlxu 创建新文件  
 *           Copyright 2004 东南大学 All Rights Reserved
 * ====================================================================
 */
package cn.edu.seu.album.web;

import java.text.DateFormat;
import java.text.SimpleDateFormat;

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

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.PJBizBroker;
import cn.edu.seu.album.common.PJConst;
import cn.edu.seu.album.common.PJException;
import cn.edu.seu.album.model.ViewDelCondition;
import cn.edu.seu.album.model.ViewEditCondition;
import cn.edu.seu.album.model.ViewInitCondition;
import cn.edu.seu.album.model.ViewInitRslt;
import cn.edu.seu.album.pojo.Photo;

/**
 * <p> [概 要] </p>
 * <p> [详 细] </p>
 * <p> [备 考] 无。</p>
 *
 * @author dlxu
 * @version 1.0 2005-3-3
 * @since 1.0
 */
public class ViewAction extends PJAction {

    /**
     * 日期格式。
     */
    private static final DateFormat DF = new SimpleDateFormat(
            "yyyy年MM月dd日HH时mm分ss秒");

    /**
     * 删除成功
     */
    private static final String DELETE_SUCCESS = "DelSuc";

    /**
     * 日志定义。
     */
    private static final Category log = Logger.getInstance(ViewAction.class);

    /**
     * <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
     */
    protected ActionForward doAction(ActionMapping mapping, PJActionForm aForm,
            HttpServletRequest request, HttpServletResponse response,
            ActionMessages errs) throws PJException {
        log.debug("ViewAction开始");
        ActionForward af = mapping.getInputForward();

        ViewForm form = (ViewForm) aForm;

        log.debug(aForm);

        String actionType = form.getActionType();

        // 初始化
        if (ACTION_INIT.equals(actionType)) {
            doInit(form, request, response, errs);

            // 更新
        } else if (ACTION_UPDATE.equals(actionType)) {
            doUpdate(form, request, response, errs);

            // 删除
        } else if (ACTION_DELETE.equals(actionType)) {
            doDelete(form, request, response, errs);
            if (errs.isEmpty()) {
                af = mapping.findForward(DELETE_SUCCESS);
            }
        }

        log.debug("ViewAction结束");
        return af;
    }

    /**
     * <p> [概 要] </p>
     * <p> [详 细] </p>
     * <p> [备 考] 无。</p>
     * @param form
     * @param request
     * @param response
     * @param errs
     * @throws PJException
     */
    private void doInit(ViewForm form, HttpServletRequest request,
            HttpServletResponse response, ActionMessages errs)
            throws PJException {
        log.debug("doInit开始");

        String pictureId = form.getPictureId();
        ViewInitCondition cond = new ViewInitCondition();

        // 图片ID
        cond.setPictureId(pictureId);

        // 业务逻辑执行
        ViewInitRslt rslt = (ViewInitRslt) PJBizBroker.invoke("ViewInitBiz",
                cond, errs, request);

        Photo photo = rslt.getPicture();

        if (null == photo) {
            form.setCheckOk(false);
        } else {
            // 图片描述信息
            form.setDescription(photo.getDescription());
            log.debug("图片描述信息" + photo.getDescription());
            // 修改次数
            form.setModifyTimes(photo.getModifyTimes().toString());
            log.debug("修改次数" + photo.getModifyTimes().toString());
            // 最后修改时间
            form.setLastModifyTimeStr(DF.format(photo.getLastUpdateDate()));
            log.debug("最后修改时间" + DF.format(photo.getLastUpdateDate()));
            // 拥有者
            form.setOwner(photo.getPerson().getName());
            log.debug("拥有者" + photo.getPerson().getName());
            // 图片ID
            form.setPictureId(photo.getId());
            log.debug("图片ID" + photo.getId());
            // 图片名（地址）
            form.setPictureName(photo.getName());
            log.debug("图片名（地址）" + photo.getName());
            // 图片权限代码
            form.setPicturePriv(photo.getPriv());
            log.debug("图片权限代码" + photo.getPriv());
            // 图片权限名
            form.setPicturePrivName(PJConst.getAttribute(photo.getPriv()));
            log.debug("图片权限名" + PJConst.getAttribute(photo.getPriv()));
            // 上传时间
            form.setUploadTimeStr(DF.format(photo.getCreateDate()));
            log.debug("上传时间" + DF.format(photo.getCreateDate()));
            // 是否本人
            form.setSelf(rslt.isSelf());
            log.debug("是否本人" + rslt.isSelf());

            form.setCheckOk(true);
        }

        log.debug("doInit结束");

    }

    /**
     * <p> [概 要] </p>
     * <p> [详 细] </p>
     * <p> [备 考] 无。</p>
     * @param form
     * @param request
     * @param response
     * @param errs
     * @throws PJException
     */
    private void doUpdate(ViewForm form, HttpServletRequest request,
            HttpServletResponse response, ActionMessages errs)
            throws PJException {
        log.debug("doUpdate开始");

        String priv = form.getPicturePriv();
        String picId = form.getPictureId();
        String desc = form.getDescription();

        ViewEditCondition cond = new ViewEditCondition();
        cond.setDescription(desc);
        cond.setId(picId);
        cond.setPriv(priv);
        
        // 业务逻辑执行
        PJBizBroker.invoke("ViewEditBiz", cond, errs, request);
        log.debug("doUpdate结束");

    }

    /**
     * <p> [概 要] </p>
     * <p> [详 细] </p>
     * <p> [备 考] 无。</p>
     * @param form
     * @param request
     * @param response
     * @param errs
     * @throws PJException
     */
    private void doDelete(ViewForm form, HttpServletRequest request,
            HttpServletResponse response, ActionMessages errs)
            throws PJException {
        log.debug("doDelete开始");

        ViewDelCondition cond = new ViewDelCondition();

        log.debug("Picture Id = " + form.getPictureId());
        // 图片ID
        cond.setPictureId(form.getPictureId());
        String path = servlet.getServletContext().getRealPath("/WEB-INF/");
        path += "\\picture\\";
        log.debug("图片存放地址：" + path);
        // 图片存放文件夹地址
        cond.setPicAdd(path);

        // 业务逻辑执行
        PJBizBroker.invoke("ViewDelBiz", cond, errs, request);

        log.debug("doDelete结束");
    }

}