java 实现文件下载

需求:把每天产生的日志文件,从服务器上下载下来

File file = new File(path); // 根据路径,获取File
String filename = file.getName();
InputStream fis = new BufferedInputStream(new FileInputStream(path));
byte[] buffer = new byte[fis.available()]; // 一次读取整个文件
fis.read(buffer);
fis.close();
response.reset(); // 清空response
// 文件名去掉空格,解决中文乱码问题
response.addHeader("Content-Disposition", "attachment;filename=" + new String(filename.replaceAll(" ", "").getBytes("utf-8"),"iso8859-1"));
response.addHeader("Content-Length", "" + file.length());
OutputStream os = new BufferedOutputStream(response.getOutputStream());
response.setContentType("application/octet-stream");
os.write(buffer);
os.flush();
os.close();