java browser, download multiple images in a compressed package

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Easy to copy, stick out codes

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package maocco.smarts.facial.common;

import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLEncoder;
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 maocco.smarts.facial.entity.Facial;

public class PhotoZip {

//imgUrls 图片地址的集合
public static void downloadPic(List<String> imgUrls,HttpServletRequest request,HttpServletResponse response) throws Exception {
ZipOutputStream zos = new ZipOutputStream(response.getOutputStream());
try {
String downloadFilename = "压缩包文件的名称.zip";// 文件的名称
downloadFilename = URLEncoder.encode(downloadFilename, "UTF-8");// 转换中文否则可能会产生乱码
response.setContentType("application/octet-stream");// 指明response的返回对象是文件流
response.setHeader("Content-Disposition","attachment;filename="+downloadFilename);// 设置在下载框默认显示的文件名

String[] files = new String[imgUrls.size()];
imgUrls.toArray(files);
for (int i = 0; i < files.length; i++) {
String url = files[i];
zos.putNextEntry(new ZipEntry("download" + File.separator+i+ ".jpg"));
InputStream fis = getInputStreamByGet(url);
byte[] buffer = new byte[1024];
int r = 0;
while ((r = fis.read(buffer)) != -1) {
zos.write(buffer, 0, r);
}
fis.close();
}
} catch (Exception e) {
e.printStackTrace();
} finally {
zos.flush();
zos.close();
}
}

public static InputStream getInputStreamByGet(String url) {
try {
HttpURLConnection conn = (HttpURLConnection) new URL(url).openConnection();
conn.setReadTimeout(5000);
conn.setConnectTimeout(5000);
conn.setRequestMethod("GET");

if (conn.getResponseCode() == HttpURLConnection.HTTP_OK) {
InputStream inputStream = conn.getInputStream();
return inputStream;
}

} catch (IOException e) {
e.printStackTrace();
}
return null;
}

}

 

 

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个人笔记，仅供参考