照片打包下载

设计思路：
    通过业务表中照片编号获得需要下载的照片列表
    把用户session、照片列表与zip名称 传入照片下载公共方法中。获得下载路径。

    下载地址设计：
    /photozip/时间（yyyyMMdd）/HHmmss_5位随机码zipType

HOME_PATH=D\:\\soft\\Tomcat6\\virtualdir\\photo
DOWNPHOTO_PATH=/photozip
DOWN_TYPE_ZIP=/zip/

package com.jsict.httptransfer.comm;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.MalformedURLException;
import java.util.Date;
import java.util.List;

import org.apache.commons.io.FileUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.tools.zip.ZipEntry;
import org.apache.tools.zip.ZipOutputStream;

import com.jshx.ictjs.httptransfer.utils.DateTools;
import com.jsict.ictmap.common.PropertiesManager;
import com.jsict.ictmap.util.StringUtil;
import com.jsict.ictmapmodule.custom.entiry.AttachmentBean;

/**
 * 打包下载图片
 * @author duanpf
 */
public class DownPhotoUtil {
	protected final Log logger = LogFactory.getLog(getClass());
	public String zipPath = "";	//压缩路径+文件
	public String zipFile = "";	//压缩路径
	public String downLoad = "";	//下载路径
	
	/**
	 * 下载图片
	 * @param list			AttachmentBeanList
	 * @param zipType		.zip
	 * @return	图片下载地址
	 * @throws Exception
	 */
	public String downPhoto(List list,String zipType) throws IOException{
		if(StringUtil.isEmpty(zipType)){
			zipType = ".zip";
		}
		String photoPath = PropertiesManager.getProperty("common.properties", "HOME_PATH");
		String zipTitle = createFile(photoPath);
		for (int i = 0; i < list.size(); i++) {
			AttachmentBean photo = (AttachmentBean) list.get(i);
			String path = photoPath + photo.getFilePath();
			logger.info("=============path["+i+"]="+path);
			copyFileToLocal(path, zipPath + "/" + photo.getName());
		}
		// 判断目录是否存在,不存在创建
		logger.info("压缩包存放路径：" + zipPath + "\n");
		String downPhotoPath = zipFile + "/" + zipTitle + zipType;	//压缩文件路径
		zip(zipPath, downPhotoPath);
		//deleteFile(zipPath);
		return downLoad + "/" + zipTitle + zipType;
	}
	
	/**
	 * 保存文件
	 * @param userSession	用户session
	 * @param photoPath		图片绝对路径
	 * @return 
	 * @throws IOException
	 */
	public String createFile(String photoPath) throws IOException{
		String savePath =  "";
		
		//年月日
        String saveDate=DateTools.parseDate2Str(new Date(), "yyyyMMdd");
        savePath = savePath + "/"  + saveDate;
        
        String fileDate=DateTools.parseDate2Str(new Date(), "HHmmss");
        int ronNum = (int)(Math.random()*100000);
        
        downLoad = PropertiesManager.getProperty("common.properties", "DOWNPHOTO_PATH")
        		+savePath;
        zipFile = photoPath + downLoad;
        zipPath = zipFile + "/" + (fileDate + "_"  + ronNum);
		File file = new File(zipPath);
		if (!file.exists()) {
			file.mkdirs();
		}
		
		return fileDate + "_"  + ronNum;
	}
	
	/**
	 * 
	 * 方法说明：删除指定文件路径下的文件
	 * 
	 * @param targetPath
	 *            ：目标文件路径
	 * @return 返回值类型
	 * @Exception 异常对象
	 * 
	 */
	public void deleteFile(String targetPath) throws IOException {
		File targetFile = new File(targetPath);
		if (targetFile.isDirectory()) {
			FileUtils.deleteDirectory(targetFile);
		} else if (targetFile.isFile()) {
			targetFile.delete();
		}
	}
	
	/**
	 * 把inputFileName下的文件压缩到zipFileName对应路径
	 * 
	 * @param inputFileName
	 *            需压缩的文件（夹）路径
	 * @param zipFileName
	 *            压缩后生成压缩文件名
	 * @throws Exception
	 */
	public void zip(String inputFileName, String zipFileName) throws IOException {
		zip(zipFileName, new File(inputFileName));
	}

	public void zip(String zipFileName, File inputFile) throws IOException {
		ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
		zip(out, inputFile, "");
		out.close();
	}

	public void zip(ZipOutputStream out, File file, String base) throws IOException {
		if (file.isDirectory()) {
			File[] fl = file.listFiles();
			out.putNextEntry(new ZipEntry(base + "/"));
			out.setEncoding("gbk");
			base = base.length() == 0 ? "" : base + "/";
			for (int i = 0; i < fl.length; i++) {
				zip(out, fl[i], base + fl[i].getName());
			}
		} else {
			out.putNextEntry(new ZipEntry(base));
			out.setEncoding("gbk");
			FileInputStream in = new FileInputStream(file);
			int b;
			while ((b = in.read()) != -1) {
				out.write(b);
			}
			in.close();
		}
	}
	
	/**
	 * 将文件拷到clientPath指定文件夹下
	 * 
	 * @param fileFrom
	 *            远程文件路径
	 * @param fileTo
	 *            本地路径
	 * @return
	 */
	public void copyFileToLocal(String fileFrom, String fileTo) {
		try {
			if (fileTo.indexOf('.')<0){ //不包含
				String[] fileFromSplit = fileFrom.split("\\.");
				String fileFromSplitStr = fileFromSplit[fileFromSplit.length-1];
				fileTo=fileTo+"."+fileFromSplitStr;
			}
			FileInputStream in = new FileInputStream(fileFrom);
			FileOutputStream out = new FileOutputStream(fileTo);
			byte[] bt = new byte[1024];
			int count;
			while ((count = in.read(bt)) > 0) {
				out.write(bt, 0, count);
			}
			in.close();
			out.close();
		} catch (MalformedURLException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}

业务调用例子：

public String downPhoto()throws Exception {
		List<AttachmentBean> list = null;
		String zipType = ".zip";
		DownPhotoUtil dp= new DownPhotoUtil();
		try {
			downPhotoPath = "图片下载失败";
			if (list != null && list.size() > 0) {
				downPhotoPath = dp.downPhoto(list, zipType);
			}
			logger.info("压缩包下载路径：" + downPhotoPath);
		} catch (Exception e) {
			downPhotoPath = "图片下载失败";
		}
		return "downPhoto";
	}