Question

有没大神教教我java怎么实现文件下载的，不要超链接那种，要有action求jsp和action

Answer 1

<a href="control/downFile.do?pistrPath=' + rec.get('path') + '">'
请求到后台，把文件地址传到后台

/**
* 下载文件
* @param pistrPath
* @param piobjResponse
* @throws MalformedURLException
*/
public void downloadNet(String pistrPath, HttpServletResponse piobjResponse) throws MalformedURLException {
// 下载网络文件
int iByte = 0;
System.getProperties();
try {
URL objurl = new URL(pistrPath);
System.out.println(pistrPath);

URLEncoder.encode(objurl.toString(), SengisConstant.STR_CN_ENCODE);
URLConnection objConn = objurl.openConnection();
InputStream objInputStream = objConn.getInputStream();

OutputStream objOutStream = piobjResponse.getOutputStream();

byte[] arrByte = new byte[1204];
while ((iByte = objInputStream.read(arrByte)) != -1) {
objOutStream.write(arrByte, 0, iByte);
}

objOutStream.flush();
objOutStream.close();
objInputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}