java服务器和客户端_JAVA的服务器和客户端怎么做
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给你个例子。。
KKMultiServer.java
import java.net.*;
import java.io.*;
public class KKMultiServer
{
public static void main(String[] args) throws IOException
{
ServerSocket serverSocket = null;
boolean listening = true;
try {
serverSocket = new ServerSocket(4444);
} catch (IOException e) {
System.err.println(“Could not listen on port: 4444.”);
System.exit(-1);
}
while (listening)
new KKMultiServerThread(serverSocket.accept()).start();
serverSocket.close();
}
}
KKMultiServerThread.java
import java.net.*;
import java.io.*;
public class KKMultiServerThread extends Thread
{
private Socket socket = null;
public KKMultiServerThread(Socket socket) {
super(“KKMultiServerThread”);
this.socket = socket;
}
public void run()
{
try {
PrintWriter out = new PrintWriter(socket.getOutputStream(), true);
BufferedReader in = new BufferedReader( new InputStreamReader(
socket.getInputStream()));
String inputLine, outputLine;
KnockKnockProtocol kkp = new KnockKnockProtocol();
outputLine = kkp.processInput(null);
out.println(outputLine);
while ((inputLine = in.readLine()) != null)
{
outputLine = kkp.processInput(inputLine);
out.println(outputLine);
if (outputLine.equals(“Bye”))
break;
}
out.close();
in.close();
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
KnockKnockClient.java
import java.io.*;
import java.net.*;
public class KnockKnockClient
{
public static void main(String[] args) throws IOException
{
Socket kkSocket = null;
PrintWriter out = null;
BufferedReader in = null;
try {
kkSocket = new Socket(“hostname”, 4444);
out = new PrintWriter(kkSocket.getOutputStream(), true);
in = new BufferedReader(new InputStreamReader(kkSocket.getInputStream()));
}
catch (UnknownHostException e) {
System.err.println(“Don’t know about host: taranis.”);
System.exit(1);
}
catch (IOException e) {
System.err.println(“Couldn’t get I/O for the connection to: biao.”);
System.exit(1);
}
BufferedReader stdIn = new BufferedReader(new InputStreamReader(System.in));
String fromServer;
String fromUser;
while ((fromServer = in.readLine()) != null)
{
System.out.println(“Server: “ + fromServer);
if (fromServer.equals(“Bye.”))
break;
fromUser = stdIn.readLine();
if (fromUser != null) {
System.out.println(“Client: “ + fromUser);
out.println(fromUser);
}
}
out.close();
in.close();
stdIn.close();
kkSocket.close();
}
}
KnockKnockProtocol.java
import java.net.*;
import java.io.*;
public class KnockKnockProtocol
{
private static final int WAITING = 0;
private static final int SENTKNOCKKNOCK = 1;
private static final int SENTCLUE = 2;
private static final int ANOTHER = 3;
private static final int NUMJOKES = 5;
private int state = WAITING;
private int currentJoke = 0;
private String[] clues = { “Turnip”, “Little Old Lady”, “Atch”, “Who”, “Who” };
private String[] answers = { “Turnip the heat, it’s cold in here!”,
“I didn’t know you could yodel!”,
“Bless you!”,
“Is there an owl in here?”,
“Is there an echo in here?” };
public String processInput(String theInput)
{
String theOutput = null;
if (state == WAITING) {
theOutput = “Knock! Knock!”;
state = SENTKNOCKKNOCK;
}
else if (state == SENTKNOCKKNOCK) {
if (theInput.equalsIgnoreCase(“Who’s there?”)) {
theOutput = clues[currentJoke];
state = SENTCLUE;
}
else {
theOutput = “You’re supposed to say \“Who’s there?\“! “ +
“Try again. Knock! Knock!”;
}
}
else if (state == SENTCLUE) {
if (theInput.equalsIgnoreCase(clues[currentJoke] + “ who?”)) {
theOutput = answers[currentJoke] + “ Want another? (y/n)”;
state = ANOTHER;
} else {
theOutput = “You’re supposed to say \“” + clues[currentJoke] + “ who?\“” +
“! Try again. Knock! Knock!”;
state = SENTKNOCKKNOCK;
}
}
else if (state == ANOTHER) {
if (theInput.equalsIgnoreCase(“y”)) {
theOutput = “Knock! Knock!”;
if (currentJoke == (NUMJOKES - 1))
currentJoke = 0;
else
currentJoke++;
state = SENTKNOCKKNOCK;
}
else {
theOutput = “Bye.”;
state = WAITING;
}
}
return theOutput;
}
}
客户端和服务器分别是那个类不用我告诉你了撒32313133353236313431303231363533e4b893e5b19e31333236373834
![2Q==][2Q]
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[2Q]:
逃离我推掉我的手
港控/mmm°
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朱雀
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