socket 非阻塞即时通讯

最新推荐文章于 2025-06-19 21:39:06 发布

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本文介绍了一个基于Java的即时通讯系统实现，该系统利用非NIO方式通过创建多个线程来处理客户端和服务端的数据收发。具体而言，系统包含Server端与Client端两个部分，各自启动发送和接收两个线程，确保了数据的双向即时传输。

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socket(非NIO)是阻塞的，这里使用多线程实现非阻塞即时通讯。每个请求都要创建个新的线程，资源消耗很大，适用于小数据量操作。包括四个文件：Server.java,Client.java,Send.java,Print.java.

1.Server.java:

package com.lcq.socket;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {

public static void main(String[] args) {
ServerSocket serverSocket;
Socket socket;
try {
System.out.println("服务器启动。。。");
serverSocket = new ServerSocket(9000);
socket = serverSocket.accept();
System.out.println("服务端连接成功");

DataInputStream dataInputStream = new DataInputStream(socket.getInputStream());
DataOutputStream dataOutputStream = new DataOutputStream(socket.getOutputStream());

SendThread sendThread = new SendThread(dataOutputStream);
PrintThread printThread = new PrintThread(dataInputStream, "127.0.0.1");

Thread send = new Thread(sendThread);
Thread print = new Thread(printThread);

send.start();
print.start();

} catch (IOException e) {
e.printStackTrace();
}

}
}

2.Client.java

package com.lcq.socket;

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;

public class Client {

public static void main(String[] args) {
try {
Socket socket = new Socket("127.0.0.1", 9000);
DataInputStream dataInputStream = new DataInputStream(socket.getInputStream());
DataOutputStream dataOutputStream = new DataOutputStream(socket.getOutputStream());

SendThread sendThread = new SendThread(dataOutputStream);
PrintThread printThread = new PrintThread(dataInputStream, "127.0.0.1");

Thread send = new Thread(sendThread);
Thread print = new Thread(printThread);

send.start();
print.start();

} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}

}
}

3.SendThread:

package com.lcq.socket;

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;

public class SendThread implements Runnable {

private DataOutputStream dataOutputStream;

public SendThread(DataOutputStream dataOutputStream) {
super();
this.dataOutputStream = dataOutputStream;
}

@Override
public void run() {
BufferedReader bufferedReader = null;
while (true) {
try {
bufferedReader = new BufferedReader(new InputStreamReader(
System.in));
String line = bufferedReader.readLine();
if (line != null) {
dataOutputStream.writeUTF(line);
}
} catch (Exception e) {
break;
}

}
}

}

4.Print.java:

package com.lcq.socket;

import java.io.DataInputStream;
import java.io.IOException;

public class PrintThread implements Runnable{

private String ip = null;
private DataInputStream dataInputStream;
public PrintThread(DataInputStream dataInputStream,String ip){
super();
this.dataInputStream = dataInputStream;
this.ip = ip;
}

@Override
public void run() {
while(true){
try {
String line = dataInputStream.readUTF();
System.out.println(ip+":"+line);
} catch (IOException e) {
break;
}

}

}

}