//  Get site objects
ServletContext context = this.getServletContext();
//  Access to website resources
String path = context.getRealPath("/imgs/ people .jpg");
File file = new File(path);
System.out.println(file);
//  Set the response header to inform the browser how the data will be processed
response.setHeader("content-disposition",
"attachment;filename="+
URLEncoder.encode(file.getName(),"utf-8")); //  Handle filename scramble to specify image format for download
//  Specifies the byte input stream object
FileInputStream in = new FileInputStream(file);
//  Gets a byte output stream object
ServletOutputStream out = response.getOutputStream();
//  Read and write
byte [] b = new byte[1024];
int len = 0;
while((len = in.read(b)) != -1){
out.write(b, 0, len);
}
//  Release resources
in.close();