Question

jsp页面如何实现远程文件下载，而且下载时要出现一个提示框提醒是保存还是下载

是在一个局域网内的文件下载，只要知道对方资源的url就可以下载，url类似于：http://192.168.0.12:8080/downfiles/xx.doc，只要传过来这个路径就可以下载了，先谢谢各位了

Answer 1

我回答的 记的要给我分 不然我会哭的

写一个SERVLET

try{
String text = this.servlet.getServletContext().getRealPath("/")+"upload\\"+fileName;
/*读取文件*/
File file = new File(text);

/*如果文件存在*/
if (file.exists()) {
String filename="";
try {
filename = URLEncoder.encode(fileName, enc);
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
response.reset();
response.setContentType(contentType);
response.addHeader("Content-Disposition", "attachment; filename=\"" + filename+ "\"");
int fileLength = (int) file.length();
response.setContentLength(fileLength);
/*如果文件长度大于0*/
if (fileLength != 0) {
/*创建输入流*/
InputStream inStream=null;
try {
inStream = new FileInputStream(file);
} catch (FileNotFoundException e) {

}
byte[] buf = new byte[4096];
/*创建输出流*/
ServletOutputStream servletOS=null;
try {
servletOS = response.getOutputStream();

int readLength;
try {
while (((readLength = inStream.read(buf)) != -1))
{
servletOS.write(buf, 0, readLength);
}
} catch (IOException e) {
e.printStackTrace();
}
inStream.close();
servletOS.flush();
servletOS.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
else
{
throw new SQLException("在服务器上找不到该文件！");
}

/******************************************/
done = true;

}
catch(SQLException ex)
{
done = false;
request.setAttribute("result", "文件下载失败！" + ex.getMessage());
}

if(!done){
return mapping.findForward("error");
}