uploadaction.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    UploadAction.java
 *  机能名    
 *  履历      2005-1-31 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 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.UploadCondition;
import cn.edu.seu.album.model.UploadRslt;

/**
 * <p> [概 要] </p>
 * <p> [详 细] </p>
 * <p> [备 考] 无。</p>
 *
 * @author dlxu
 * @version 1.0 2005-1-31
 * @since 1.0
 */
public final class UploadAction extends PJAction {

    /**
     * 日志定义。
     */
    private static final Category log = Logger.getInstance(UploadAction.class);
    
    /**
     * 成功转向
     */
    private static final String SUCSESS_FORWARD = "success";

    /**
     * <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");
        UploadForm form = (UploadForm) aForm;
        log.debug(aForm);

        ActionForward af = mapping.getInputForward();

        String actionType = form.getActionType();

        if (ACTION_INIT.equals(actionType)) {
            doInit(form, request, errs);
        } else if (ACTION_INSERT.equals(actionType)) {
            boolean suc = doUpload(form, request, errs);
            if (suc) {
                af = mapping.findForward(SUCSESS_FORWARD);
            }
        }

        log.debug("doAction结束");

        // 返回迁移地点
        return af;
    }

    /**
     * <p> [概 要] </p>
     * <p> [详 细] </p>
     * <p> [备 考] 无。</p>
     * @param form
     * @param request
     * @param errs
     * @return
     * @throws PJException
     */
    private boolean doUpload(UploadForm form, HttpServletRequest request,
            ActionMessages errs) throws PJException {
        log.debug("doUpload开始");

        // 检索条件
        UploadCondition cond = new UploadCondition();
        // 上传图片
        cond.setPicture(form.getPicture());
        // 描述信息
        cond.setDescription(form.getDescription());
        // 图片权限
        cond.setPriv(form.getPriv());

        String path = servlet.getServletContext().getRealPath("/WEB-INF/");

        path += "\\picture\\";
        // 图片存放文件夹地址
        cond.setPicAdd(path);

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

        // 上传成功标记
        form.setUploadSuc(rslt.isUploadSuc());

        log.debug("doUpload结束");

        return rslt.isUploadSuc();
    }

    /**
     * <p> [概 要] </p>
     * <p> [详 细] </p>
     * <p> [备 考] 无。</p>
     * @param form
     * @param request
     * @param errs
     */
    private void doInit(UploadForm form, HttpServletRequest request,
            ActionMessages errs) {
        log.debug("doInit开始");
        // 初始化图片权限
        form.setPriv(PJConst.PIC_PRIV_PRIVATE);
        log.debug("doInit结束");
    }

}