pictureaction.java

一个免费wap站

package com.eline.wap.resource.struts;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

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

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 org.apache.struts.upload.FormFile;

import com.eline.wap.common.util.AppKeys;
import com.eline.wap.common.util.AppLogger;
import com.eline.wap.common.util.AppSettings;
import com.eline.wap.common.util.SerializeData;
import com.eline.wap.common.util.StringUtils;
import com.eline.wap.resource.client.PictureHelper;
import com.eline.wap.resource.exceptions.ResourceException;
import com.eline.wap.resource.model.Picture;

public class PictureAction extends Action {

	private static final int ACTION_CREATE	= 0;
	private static final int ACTION_UPDATE	= 1;
	private static final int ACTION_DELETE	= 2;

	public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response) throws Exception {
		System.out.println("hello, PictureAction.execute()");

		boolean isOK = false;
		int webAction = StringUtils.getInt(request.getParameter("webAction"), -1);
		System.out.println("form=" + form);

		if (form instanceof PictureForm) {
			PictureForm actionForm = (PictureForm) form;
			System.out.println("STEP:1");
			
			if (webAction == ACTION_CREATE) {
				isOK = doCreate(actionForm, request, response);
			} else if (webAction == ACTION_UPDATE) {
				isOK = doUpdate(actionForm, request, response);
			} else if (webAction == ACTION_DELETE) {
				isOK = doDelete(actionForm, request, response);
			}
		}

		String strMsg = isOK ? "操作成功" : "操作失败";
		request.setAttribute("message", strMsg);

		return mapping.findForward(isOK ? "success" : "failure");
	}

	private boolean doCreate(PictureForm form, HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		System.out.println("STEP:2");
		try {
			Picture item = new Picture();

			item.setParentId(form.getParentId());
			item.setName(form.getName());
			item.setSearchable(form.isSearchable());
			item.setActive(form.isActive());
			item.setDescription(form.getDescription());
			item.setAuthor(form.getAuthor());

			// 设置时间
			Date currentTime = new Date();
			item.setDateCreated(currentTime);
			item.setLastUpdate(currentTime);

			// 设置搜索关键字
			if (form.isSearchable())
				item.setSearchKey(form.getName() + ";");
			else
				item.setSearchKey("UNDEFINED");

			// 图片上传
			String filePath = uploadImageFile(form.getFileImage());
			item.setOriginFile(filePath == null ? "" : filePath);

			// 写入数据库
			SerializeData data = item.deserialize();
			AppLogger.debug("SerializeData.getKeys()=" + data.getKeys());
			AppLogger.debug("SerializeData.getValues()=" + data.getValues());

			PictureHelper bh = new PictureHelper();
			bh.createPicture(item);

		} catch (Exception e) {
			AppLogger.error("PictureAction.doCreate() Exception: " + e.getMessage());
			return false;
		}
		return true;
	}
	private boolean doUpdate(PictureForm form, HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		PictureHelper helper = new PictureHelper();
		try {
			Picture item = helper.getPicture(form.getIndexId());
			
			item.setName(form.getName());
			item.setSearchable(form.isSearchable());
			item.setActive(form.isActive());
			item.setDescription(form.getDescription());
			item.setAuthor(form.getAuthor());
			
			// 设置时间
			Date currentTime = new Date();
			item.setLastUpdate(currentTime);

			// 设置搜索关键字
			if (form.isSearchable())
				item.setSearchKey(form.getName() + ";");
			else
				item.setSearchKey("UNDEFINED");

			// 图片上传
			String filePath = uploadImageFile(form.getFileImage());
			item.setOriginFile(filePath == null ? item.getOriginFile() : filePath);

			// 写入数据库
			SerializeData data = item.deserialize();
			AppLogger.debug("SerializeData.getKeys()=" + data.getKeys());
			AppLogger.debug("SerializeData.getValues()=" + data.getValues());

			helper.updatePicture(item);

		} catch (Exception e) {
			AppLogger.error("PictureAction.doUpdate() Exception: " + e.getMessage());
			return false;
		}
		return true;
	}
	private boolean doDelete(PictureForm form, HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		// convert id(s) to be deleted from string to string array.
		String[] strIdList = form.getSelectedItems().split(";");
		PictureHelper helper = new PictureHelper();
		boolean returnValue = true;

		// parse id(s) and delete them.
		for (int i = 0; i < strIdList.length; i ++) {
			try {
				if (strIdList[i] == null || strIdList[i].length() < 1)
					continue;

				int pictureId = Integer.parseInt(strIdList[i]);
				helper.deletePicture(pictureId);
			} catch (NumberFormatException e) {
				AppLogger.error("NumberFormatException: PictureAction.doDelete() - parse id error, contiune.");
				continue;
			} catch (ResourceException e) {
				AppLogger.error("ResourceException: PictureAction.doDelete() - " + e.getMessage());
				returnValue = false;
			}
		}
		return returnValue;
	}
	
	private String uploadImageFile(FormFile file) {
		if (file == null || file.getFileSize() < 1)
			return null;

		try {
			InputStream stream = file.getInputStream();

			// 获取文件扩展名并判断其有效性
			String[] sp = file.getFileName().split("\\.");
			String ext = null;
			if (sp.length > 1) {
				ext = sp[sp.length - 1].toLowerCase();
				if (!ext.equals("jpg") && !ext.equals("gif")
						&& !ext.equals("png") && !ext.equals("bmp"))
					ext = null;
			}
			if (ext == null)
				return null;

			// 生成上传目录，如果不存在则创建
			GregorianCalendar calendar = new GregorianCalendar();
			String virtualPath = AppSettings.getInstance().getProperty(
					AppKeys.UPLOAD_ROOT)
					+ "/images/pictures/" + calendar.get(Calendar.YEAR)
					+ "-" + (calendar.get(Calendar.MONTH) + 1)
					+ "-" + calendar.get(Calendar.DAY_OF_MONTH);

			String physicalPath = this.getServlet().getServletContext().getRealPath(virtualPath);

			File dir = new File(physicalPath);
			if (!dir.exists())
				dir.mkdir();

			// 生成文件名
			String fileName = "pic_" + calendar.get(Calendar.HOUR)
					+ calendar.get(Calendar.MINUTE)
					+ calendar.get(Calendar.SECOND)
					+ calendar.get(Calendar.MILLISECOND) + "." + ext;

			physicalPath = this.getServlet().getServletContext().getRealPath(
					virtualPath + "/" + fileName);

			OutputStream bos = new FileOutputStream(physicalPath);
			int bytesRead = 0;
			byte[] buffer = new byte[8192];
			while ((bytesRead = stream.read(buffer, 0, 8192)) != -1) {
				bos.write(buffer, 0, bytesRead);
			}
			bos.close();
			stream.close();

			// 返回相对路径名
			String filePath = "/" + calendar.get(Calendar.YEAR) + "-"
					+ (calendar.get(Calendar.MONTH) + 1) + "-"
					+ calendar.get(Calendar.DAY_OF_MONTH) + "/" + fileName;

			AppLogger.info("PictureAction.uploadImageFile() The file has been written to \"" + filePath + "\"");
			
			return filePath;

		} catch (FileNotFoundException e) {
			AppLogger.error("PictureAction.uploadImageFile() FileNotFoundException:" + e.getMessage());
			return null;
		} catch (IOException e) {
			AppLogger.error("PictureAction.uploadImageFile() IOException:" + e.getMessage());
			return null;
		}
	}
}