public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{
try {
downLoad(response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void downLoad(HttpServletResponse response) throws Exception {
response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode("号码下载", "UTF-8"));
log.info("退出CmsStaffAct.v_export,fileUrl:"+fileUrl);
BufferedOutputStream bos = null;
BufferedInputStream bis = null;
try {
bis = new BufferedInputStream(new FileInputStream("c:/head.PNG"));
bos = new BufferedOutputStream(response.getOutputStream());
byte[] buff = new byte[2048];
int bytesRead;
while(-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff,0,bytesRead);
}
} catch(final IOException e) {
e.printStackTrace();
} catch(Exception e) {
e.printStackTrace();
}finally {
if (bis != null)
bis.close();
if (bos != null)
{
bos.flush();
bos.close();
bos=null;
}
}
response.flushBuffer();
}
try {
downLoad(response);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
private void downLoad(HttpServletResponse response) throws Exception {
response.setHeader("content-disposition", "attachment;filename=" + URLEncoder.encode("号码下载", "UTF-8"));
log.info("退出CmsStaffAct.v_export,fileUrl:"+fileUrl);
BufferedOutputStream bos = null;
BufferedInputStream bis = null;
try {
bis = new BufferedInputStream(new FileInputStream("c:/head.PNG"));
bos = new BufferedOutputStream(response.getOutputStream());
byte[] buff = new byte[2048];
int bytesRead;
while(-1 != (bytesRead = bis.read(buff, 0, buff.length))) {
bos.write(buff,0,bytesRead);
}
} catch(final IOException e) {
e.printStackTrace();
} catch(Exception e) {
e.printStackTrace();
}finally {
if (bis != null)
bis.close();
if (bos != null)
{
bos.flush();
bos.close();
bos=null;
}
}
response.flushBuffer();
}
本文介绍了一个简单的文件下载处理方法,通过Java Servlet实现从服务器向客户端下载指定文件的功能。具体包括设置HTTP响应头以便浏览器识别文件类型并提示用户进行保存操作,使用BufferedInputStream和BufferedOutputStream读取文件内容并将其发送到客户端。
7158

被折叠的 条评论
为什么被折叠?



