telnet和smtp、pop3等一样是基于socket通信的,所以你看看SMTP的代码 就知道怎样实现Telnet了,下面是一段Smtp的代码!希望能对你有所启发! import java.net.*; import java.io.*; import java.net.*; public class sendElvisMail { public static void main(String s[]) { // // Send fake mail from Elvis Presley // // sendElvisMail [mail server] [recipient address] // mail server can be hostname or IP address // // ex. sendElvisMail mail.company.com [email protected] // sendElvisMail t = new sendElvisMail(); t.sendMail(s[0], s[1]); } public void sendMail(String mailServer, String recipient) { try { Socket s = new Socket(mailServer, 25); BufferedReader in = new BufferedReader (new InputStreamReader(s.getInputStream(), "8859_1")); BufferedWriter out = new BufferedWriter (new OutputStreamWriter(s.getOutputStream(), "8859_1")); send(in, out, "HELO theWorld"); // warning : some mail server validate the sender address // in the MAIL FROm command, put your real address here send(in, out, "MAIL FROM: <[email protected]>"); send(in, out, "RCPT TO: " + recipient); send(in, out, "DATA"); send(out, "Subject: In the ghetto"); send(out, "From: Elvis Presley <[email protected]>"); send (out, "\n"); // message body send(out, "I'm alive. Help me!"); send(out, "\n.\n"); send(in, out, "QUIT"); s.close(); } catch (Exception e) { e.printStackTrace(); } }
直接用建个Socket,建立IO流,就可以和对方的telnet通话了
就知道怎样实现Telnet了,下面是一段Smtp的代码!希望能对你有所启发!
import java.net.*;
import java.io.*;
import java.net.*; public class sendElvisMail {
public static void main(String s[]) {
//
// Send fake mail from Elvis Presley
//
// sendElvisMail [mail server] [recipient address]
// mail server can be hostname or IP address
//
// ex. sendElvisMail mail.company.com [email protected]
//
sendElvisMail t = new sendElvisMail();
t.sendMail(s[0], s[1]);
} public void sendMail(String mailServer, String recipient) {
try {
Socket s = new Socket(mailServer, 25);
BufferedReader in = new BufferedReader
(new InputStreamReader(s.getInputStream(), "8859_1"));
BufferedWriter out = new BufferedWriter
(new OutputStreamWriter(s.getOutputStream(), "8859_1")); send(in, out, "HELO theWorld");
// warning : some mail server validate the sender address
// in the MAIL FROm command, put your real address here
send(in, out, "MAIL FROM: <[email protected]>");
send(in, out, "RCPT TO: " + recipient);
send(in, out, "DATA");
send(out, "Subject: In the ghetto");
send(out, "From: Elvis Presley <[email protected]>");
send (out, "\n");
// message body
send(out, "I'm alive. Help me!");
send(out, "\n.\n");
send(in, out, "QUIT");
s.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
public void send(BufferedReader in, BufferedWriter out, String s) {
try {
out.write(s + "\n");
out.flush();
System.out.println(s);
s = in.readLine();
System.out.println(s);
}
catch (Exception e) {
e.printStackTrace();
}
} public void send(BufferedWriter out, String s) {
try {
out.write(s + "\n");
out.flush();
System.out.println(s);
}
catch (Exception e) {
e.printStackTrace();
}
}
}