java下载多个文件文件
第一步 将要下载的多个文件打包成ZIP格式
public String makeZip(List<String> path) throws IOException{
byte[] buffer = new byte[1024];
//创建压缩包路径
String strZipName = "c:/Demo.zip";
ZipOutputStream out = new ZipOutputStream(new FileOutputStream(strZipName));
for(String str:path){
FileInputStream fis = new FileInputStream(file1[i]);
out.putNextEntry(new ZipEntry(str.getName()));
int len;
while((len = fis.read(buffer))>0) {
out.write(buffer,0,len);
}
out.closeEntry();
fis.close();
}
out.close();
return strZipName;
}
第二步 普通的下载
File file = new File(realpath );
String filename = file.getName();
ServletOutputStream out;
response.setContentType("multipart/form-data");
response.setHeader("Content-Disposition", "attachment;fileName="+new String(filename.getBytes("gbk"), "iso-8859-1"));
try {
FileInputStream inputStream = new FileInputStream(file);
//3.通过response获取ServletOutputStream对象(out)
out = response.getOutputStream();
int b = 0;
byte[] buffer = new byte[512];
while ((b=inputStream.read(buffer))>0){
//4.写到输出流(out)中
out.write(buffer,0,b);
}
inputStream.close();
out.close();
out.flush();
} catch (IOException e) {
e.printStackTrace();
}
