File和InputStream互相转换

File --> InputStream

InputStream in = new InputStream(new FileInputStream(file));

 

InputStream --> File

public void inputstreamtofile(InputStream ins,File file){

   OutputStream os = new FileOutputStream(file);

   int bytesRead = 0;

   byte[] buffer = new byte[8192];

   while ((bytesRead = ins.read(buffer, 0, 8192)) != -1) {

      os.write(buffer, 0, bytesRead);

   }