import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class Demo4 extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {
//服务端通知浏览器以下载的方式打开图片
response.setHeader("content-disposition","attachment;filename=d1.jpg");
InputStream is = new FileInputStream(new File(""D:/TOOL/MyEclipseSpace/day04/WebRoot/images/cc.jpg"));
OutputStream os = response.getOutputStream();
byte[] buf = new byte[1024];
int len = 0;
while( (len=is.read(buf))>0 ){
os.write(buf,0,len);
}
is.close();
os.close();
}
}
原文地址：http://blog.51cto.com/357712148/2104340