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;//图片压缩public class Demo2 extends HttpServlet {    public void doGet(HttpServletRequest request, HttpServletResponse response)            throws ServletException, IOException {        //通知浏览器打开一副图片        response.setHeader("content-type", "image/jpeg");        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();    }}