HTTP获取批量文件打包下载-java(自)

所需jar包：

　　ant.jar

类：

package com.keertech.emessage.helper;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ConnectException;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.Map;

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

import org.apache.tools.zip.ZipOutputStream;

public class ZipFile {
    /**
     * 批量压缩问文件
     * @param zipFileName    //压缩包文件名
     * @param urlsMap        //Map<String, String>-Map<文件重命名, 文件url>
     * @param request        
     * @param response
     * @throws Exception
     */
    public static void bulkPackedFiles(String zipFileName,Map<String, String> urlsMap,HttpServletRequest request, HttpServletResponse response) throws Exception {  
       String fileName = zipFileName + ".zip";
       //在服务器端创建打包下载的临时文件
       String relativePath = "tmp/";        //保存视频及截图的目录
       String realPath = request.getSession().getServletContext().getRealPath("/");    //web项目部署的实际物理地址E:/tomcat/webapps/em/
       String directory = realPath+relativePath;                        //视频上传web临时文件夹
       
       String outFilePath = directory + fileName;    //将打包文件输出到服务器临时目录下，待用户下载完成后删除
       System.out.println("输出路径："+outFilePath);
       
       File file = new File(outFilePath);
       //文件输出流
       FileOutputStream outStream = new FileOutputStream(file);
       //压缩流
       ZipOutputStream toClient = new ZipOutputStream(outStream);
       toClient.setEncoding("UTF-8");
       zipBatchFileByStream(urlsMap, toClient);
       toClient.close();
       outStream.close();
       downloadZip(file, response);
    }
    
    public static void bulkPackedFilesByStream(String zipFileName,Map<String, String> urlsMap) throws Exception {  
        String fileName = zipFileName + ".zip";
           //在服务器端创建打包下载的临时文件
           String directory = "d://";                        //视频上传web临时文件夹
           
           String outFilePath = directory + fileName;    //将打包文件输出到服务器临时目录下，待用户下载完成后删除
           System.out.println("输出路径："+outFilePath);
           
           File file = new File(outFilePath);
           //文件输出流
           FileOutputStream outStream = new FileOutputStream(file);
           //压缩流
           ZipOutputStream toClient = new ZipOutputStream(outStream);
           toClient.setEncoding("UTF-8");
           zipBatchFileByStream(urlsMap, toClient);
           toClient.close();
           outStream.close();
           //downloadZip(file, response);
    }
    
    /**
     * 压缩文件列表中的文件
     * @param files
     * @param outputStream
     * @throws IOException
     */
    public static void zipBatchFileByStream(Map<String, String> urlsMap, ZipOutputStream outputStream) throws Exception
    {
        try
        {
            for (String tempfileName : urlsMap.keySet()) {
                String urlStr = urlsMap.get(tempfileName);
                   URL url=new URL(urlStr);
                   HttpURLConnection urlConn;
                try {
                    urlConn = (HttpURLConnection)url.openConnection();
                    urlConn.setRequestMethod("GET");   
                    urlConn.setConnectTimeout(5 * 1000);
                    int connResCode = urlConn.getResponseCode();
                }catch (Exception ce) {    //如果连接失败则跳过该文件
                     ce.printStackTrace();
                     continue;
                }

                   
                   //生成文件名
                   String fileExtension = urlStr.substring(urlStr.lastIndexOf("."));
                   String fileName = tempfileName+fileExtension;
                   InputStream is=urlConn.getInputStream();
                   zipFileByStream(fileName, is, outputStream);    //重命名文件，并将其写入到ZIP压缩包中
                   is.close();
            }
         }
         catch(Exception e)
         {
              throw e;
         }
    }
    
    /**
     * 将文件写入到zip文件中
     * @param inputFile
     * @param outputstream
     * @throws Exception
     */
     public static void zipFileByStream(String fileName ,InputStream is, ZipOutputStream outputstream) throws Exception
     {
         try{
             
             BufferedInputStream bInStream = new BufferedInputStream(is);
             
             org.apache.tools.zip.ZipEntry entry = new org.apache.tools.zip.ZipEntry(fileName);
             outputstream.putNextEntry(entry);
              
             byte[] buffer = new byte[1024];     
             int r = 0;     
             while ((r = bInStream.read(buffer)) != -1) {     
                 outputstream.write(buffer, 0, r);     
             }     
             
             outputstream.setEncoding("gbk");    //解决中文文件名乱码
             
//             outputstream.write(inOutbyte);
             outputstream.closeEntry();     //Closes the current ZIP entry and positions the stream for writing the next entry
             bInStream.close();    //关闭
       }
       catch(IOException e)
       {
           throw e;
       }
  }
    
   /**
    * 下载打包的文件
    * @param file
    * @param response
    */
   public static void downloadZip(File file,HttpServletResponse response) {
       try {
           // 以流的形式下载文件。
           BufferedInputStream fis = new BufferedInputStream(new FileInputStream(file.getPath()));
           byte[] buffer = new byte[fis.available()];
           fis.read(buffer);
           fis.close();
           // 清空response
           response.reset();
   
           OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
           response.setContentType("application/octet-stream");
           response.setHeader("Content-Disposition", "attachment;filename=" + file.getName());
           toClient.write(buffer);
           toClient.flush();
           toClient.close();
           file.delete();        //将生成的服务器端文件删除
        } 
        catch (IOException ex) {
           ex.printStackTrace();
       }
   }
}

 

调用

Map<String, String> urlsMap = new HashMap<String, String>();
            int photoCount = 1;
            for (SignPhoto tempPhoto : list) {
                //签到图片文件名：用户名+考勤时间+序号
                String userName = sign.getUser().getName()+signDateStr+"_NO"+photoCount;
                String photoUrl = Context.getSystemConfig().getFileRootUrl() + tempPhoto.getFile().getSavePath();
                urlsMap.put(userName, photoUrl);
                photoCount++;
            }
            sdf = new SimpleDateFormat("yyyy-MM-dd");
            String zipFileName = sign.getUser().getName()+sdf.format(sign.getSignDate())+"test";    //zip包名
            ZipFile.bulkPackedFiles(zipFileName,urlsMap,request,response);    //打zip包