批量图片打包zip下载

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
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.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

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

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;

@Controller
@RequestMapping("/test")
public class Test {

   @RequestMapping(value="downLoadFiles")
   public static HttpServletResponse downLoadFiles(
   HttpServletRequest request, HttpServletResponse response,String imgurl,String userName)
   throws Exception {
       if(userName==null || userName.equals("")){
           userName="影像资料";
       }
   try {
       String[] arr=imgurl.split(",");
          List list=new ArrayList();
          list = Arrays.asList(arr);
   /**这个集合就是你想要打包的所有文件，
   * 这里假设已经准备好了所要打包的文件*/
   List<URL> files = new ArrayList<URL>();
   if(list.size()>0){
       for(int i=0;i<list.size();i++){
           URL file=new URL(list.get(i).toString());
           files.add(file);
       }
   }
   /**创建一个临时压缩文件，
   * 我们会把文件流全部注入到这个文件中
   * 这里的文件你可以自定义是.rar还是.zip*/
   File file = new File(userName+".zip");
   if (!file.exists()){
   file.createNewFile();
   }
   response.reset();
   //response.getWriter()
   //创建文件输出流
   FileOutputStream fous = new FileOutputStream(file);
   /**打包的方法我们会用到ZipOutputStream这样一个输出流,
   * 所以这里我们把输出流转换一下*/
   ZipOutputStream zipOut
   = new ZipOutputStream(fous);
   /**这个方法接受的就是一个所要打包文件的集合，
   * 还有一个ZipOutputStream*/
   zipFile(files, zipOut);
   zipOut.close();
   fous.close();
   return downloadZip(file,response);
   }catch (Exception e) {
   e.printStackTrace();
   }
   return response ;
   }

   /**
   * 把接受的全部文件打成压缩包
   * @param List<File>;
   * @param org.apache.tools.zip.ZipOutputStream
   */
   public static void zipFile
   (List files,ZipOutputStream outputStream) {
   int size = files.size();
   for(int i = 0; i < size; i++) {
       URL file = (URL) files.get(i);
   zipFile(file, outputStream);
   }
   }

   public static HttpServletResponse downloadZip(File file,HttpServletResponse response) {
   try {
   // 以流的形式下载文件。
   InputStream 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");

   //如果输出的是中文名的文件，在此处就要用URLEncoder.encode方法进行处理
   response.setHeader("Content-Disposition", "attachment;filename=" +URLEncoder.encode(file.getName(), "UTF-8"));
   toClient.write(buffer);
   toClient.flush();
   toClient.close();
   } catch (IOException ex) {
   ex.printStackTrace();
   }finally{
   try {
   File f = new File(file.getPath());
   f.delete();
   } catch (Exception e) {
   e.printStackTrace();
   }
   }
   return response;
   }

   /**
   * 根据输入的文件与输出流对文件进行打包
   * @param File
   * @param org.apache.tools.zip.ZipOutputStream
   */
   public static void zipFile(URL inputFile,
   ZipOutputStream ouputStream) {
   try {
           URL url = new URL(inputFile.toString());
           /*此为联系获得网络资源的固定格式用法，以便后面的in变量获得url截取网络资源的输入流*/
           HttpURLConnection connection = (HttpURLConnection)url.openConnection();
           DataInputStream in = new DataInputStream(connection.getInputStream());
   BufferedInputStream bins = new BufferedInputStream(in, 512);
   //org.apache.tools.zip.ZipEntry
   ZipEntry entry = new ZipEntry(inputFile.toString().substring(inputFile.toString().length()-20));
   ouputStream.putNextEntry(entry);
   // 向压缩文件中输出数据
   int nNumber;
   byte[] buffer = new byte[512];
   while ((nNumber = bins.read(buffer)) != -1) {
   ouputStream.write(buffer, 0, nNumber);
   }
   // 关闭创建的流对象
   bins.close();
   in.close();
   } catch (Exception e) {
   e.printStackTrace();
   }
   }
}

来源：oschina

链接：https://my.oschina.net/u/2452380/blog/774600

标签

zip

url格式