Question

请问你的java在线程里下载文件是怎么实现的？线程这方面我不大懂

Answer 1

public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
OutputStream o = response.getOutputStream();
byte b[] = new byte[1024];
// the file to download.
String directory = request.getParameter("csvLogDir");
String fileName = request.getParameter("csvLogName");
File fileLoad = new File(directory, fileName);
// the dialogbox of download file.
response.setHeader("Content-disposition", "attachment;filename="
+ fileName);
// set the MIME type.
response.setContentType("application/x-tar");
// get the file length.
long fileLength = fileLoad.length();
String length = String.valueOf(fileLength);
response.setHeader("Content_Length", length);
// download the file.
FileInputStream in = new FileInputStream(fileLoad);
int n = 0;
while ((n = in.read(b)) != -1) {
o.write(b, 0, n);
}
}

最简单的就是直接把a标签写成文件URL,哈哈哈,这个方法很淫荡的

Answer 2

确实是这样的，把a标签写成文件的URL，会自动下载的，否则也可以通过服务器下载