How to import java libraries in jsp code?

I have the following jsp code. I want to add libraries such as java.io.

How can I do this?

<% @page import=java.io.BufferedReader;
@page import=java.io.IOException;
@page import=java.io.InputStreamReader;
String IP=request.getParameter("IP");

String res="";

        Runtime run = Runtime.getRuntime();
        Process pr = run.exec("snmpget -v 2c -c public "+IP+" SNMPv2-MIB::sysUpTime.0");
        pr.waitFor();
        BufferedReader buf = new BufferedReader(new InputStreamReader(pr.getInputStream()));
        String line = "";
        //String res="";
            while ((line = buf.readLine()) != null)
            {
                res+=line+"\n";
            }
        int i=res.indexOf(")");
      //  System.out.println(i);

        res=res.substring(i+1).trim();

        //System.out.print(res);

    } catch (InterruptedException ex)
    {
        Logger.getLogger(myMain.class.getName()).log(Level.SEVERE, null, ex);
    }
    catch (IOException ex) {
 开发者_StackOverflow中文版           Logger.getLogger(myMain.class.getName()).log(Level.SEVERE, null, ex);
        }

%>

You are almost right, but you need to close the import tag, like this:

<%@ page import="java.io.BufferedReader" %>

To declare multiple imports you can either duplicate that entire tag, like so:

<%@ page import="java.io.BufferedReader" %>
<%@ page import="java.io.InputStreamReader" %>

or use a comma-separated list:

<%@ page import="java.io.BufferedReader,java.io.InputStreamReader" %>

For a multitude of reasons, though, I would not recommend mixing java code into your JSPs.