这是我写的工具类
/**
* 批量文件压缩下载
*
* @param urlMap 需要批量下载文件的链接地址列表和名称
* @param zipName 输出的压缩包名称
*/
public static void downZip(Map<String, String> urlMap, String zipName) {
//响应头的设置
response.reset();
response.setCharacterEncoding("utf-8");
response.setContentType("multipart/form-data");
String downloadName = zipName + ".zip";
//返回客户端浏览器的版本号、类型
String agent = request.getHeader("USER-AGENT");
try {
//针对IE或者以IE为内核的浏览器:
if (agent.contains("MSIE") || agent.contains("Trident")) {
downloadName = java.net.URLEncoder.encode(downloadName, "UTF-8");
} else {
//非IE浏览器的处理:
downloadName = new String(downloadName.getBytes("UTF-8"), "ISO-8859-1");
}
} catch (Exception e) {
e.printStackTrace();
}
response.setHeader("Content-Disposition", "attachment;fileName=\"" + downloadName + "\"");
//设置压缩流:直接写入response,实现边压缩边下载
ZipOutputStream zipos = null;
try {
zipos = new ZipOutputStream(new BufferedOutputStream(response.getOutputStream()));
zipos.setMethod(ZipOutputStream.DEFLATED); //设置压缩方法
} catch (Exception e) {
e.printStackTrace();
}
//循环将文件写入压缩流
DataOutputStream os = null;
for (Map.Entry<String, String> entry : urlMap.entrySet()) {
String url = entry.getValue();
try {
URL link = new URL(url);
//返回文件后缀名
String suffix = FileUtil.suffix(url);
//文件名
String filename = entry.getKey() + suffix;
//添加ZipEntry,并ZipEntry中写入文件流
//这里,加上i是防止要下载的文件有重名的导致下载失败
zipos.putNextEntry(new ZipEntry(filename));
os = new DataOutputStream(zipos);
InputStream is = new BufferedInputStream(link.openStream());
byte[] b = new byte[1000];
int length = 0;
while ((length = is.read(b)) != -1) {
os.write(b, 0, length);
}
is.close();
zipos.closeEntry();
} catch (IOException e) {
e.printStackTrace();
}
}
//关闭流
try {
os.flush();
os.close();
zipos.close();
} catch (IOException e) {
e.printStackTrace();
}
}
这是我的controller
public void packExp( HttpServletRequest request, HttpServletResponse response) throws IOException {
Map<String, String> urlMap =new HashMap<>();
urlMap.put("aaa","http://localhost:8080/profile/upload/2021/01/08/3bdbb2b6-ee96-40b6-a2be-6d1f9031a5a5.jpg");
urlMap.put("bbb","http://localhost:8080/profile/upload/2021/01/08/ce9742bf-a690-44f7-b3cb-b64e209c1c03.jpg");
ZipUtil.downZip(urlMap, "test");
}
解压完生成zip文件后,一解压文件全是5kb
而且打不开