Java网络编程之多线程Client-Server
来源：程序员人生 发布时间：2014-12-13 08:40:43 阅读次数：3032次
前面空话过了，现在就直接看代码吧！
ThreadedClient.java
package exercise01;
import java.io.*;
import java.net.*;
public class ThreadedClient {
private String hostname;
private int port;
Socket socket = null;
public ThreadedClient(String hostname, int port){
//constructor of the Client class
this.hostname = hostname;
this.port = port;
}
public void connect() throws UnknownHostException, IOException{
System.out.println("Attempting connect to "+ hostname +":"+port);
socket = new Socket(hostname,port);
System.out.println("Connection established!");
}
public void readResponse() throws IOException{
String userInput;
BufferedReader reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
System.out.println("Response from the server:");
while((userInput = reader.readLine() )!= null ){
System.out.println(userInput);
}
}
public void askForTime() throws IOException{
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
writer.write("Time?");
writer.newLine();
writer.flush();
}
public static void main(String[] argv){
//create an object for the current class Client
ThreadedClient client = new ThreadedClient("localhost",8181);
try{
//trying to establish a connection to the server
client.connect();
//ask the server for time
client.askForTime();
//if connection succeed, return the input contents
client.readResponse();
}catch(UnknownHostException ukhe){
//if the host not found
System.err.println("Host unknown! Connection can not be established!");
}catch(IOException ioe){
//if the server doesn't work
System.err.println("Connection can not be established! The server may not be on! Check the error message! "+ioe.getMessage());
}
}
}
ThreadedServer.java
package exercise01;
import java.io.*;
import java.net.*;
import java.util.Date;
public class ThreadedServer {
private ServerSocket serverSocket;
private int port;
public ThreadedServer(int port){
this.port = port;
}
//get the thread started
public void start() throws IOException{
System.out.println("Starting the server at the port: "+ port);
serverSocket = new ServerSocket(port);
//instantial an object client
Socket client = null;
//set the condition to be true for endless loops
while(true){
System.out.println("Waiting for clients...");
client = serverSocket.accept();
System.out.println("The following client has connected: " + client.getInetAddress().getCanonicalHostName());
//A client has connected to the server
Thread thread = new Thread(new SocketClientHandler(client));
thread.start();
}
}
/**
* instantial an object of class ThreadedServer and start the server
*
* @param argv
*/
public static void main(String[] argv){
//set the default port number
int port = 8181;
try{
//initializing the socket server
ThreadedServer threadedServer = new ThreadedServer(port);
threadedServer.start();
}catch(IOException ioe){
ioe.printStackTrace();
}
}
}
class SocketClientHandler implements Runnable{
private Socket client;
public SocketClientHandler(Socket client){
this.client = client;
}
/**
* get the thread started by the run method
*/
@Override
public void run() {
try{
System.out.println("Thread started with name: " + Thread.currentThread().getName());
readResponse();
}catch(IOException ioe){
ioe.printStackTrace();
}catch(InterruptedException ie){
ie.printStackTrace();
}
}
/**
* read the response from the server
* @throws IOException
* @throws InterruptedException
*/
private void readResponse() throws IOException, InterruptedException {
String userInput;
BufferedReader reader = new BufferedReader(new InputStreamReader(client.getInputStream()));
while(( userInput = reader.readLine())!= null){
if(userInput.equals("Time?")){
System.out.println("Request to send time! Sending time current.");
sendTime();
break;
}
}
}
/**
* send the current time to the server
* @throws IOException
* @throws InterruptedException
*/
private void sendTime() throws IOException, InterruptedException {
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(client.getOutputStream()));
writer.write(new Date().toString());
writer.flush();
writer.close();
}
}
是否是给你带来了1点灵感呢？
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