客户端创建一个Socket
服务器端创建一个SeverSocket
- 首先客户端使用new socket方法创建一个Socket
- bind()方法绑定到一个本地的ip和port,这是port要是和其他的不同,表示你已经
占用了这个端口,具有独占性
- connect连接到服务端远程套接字,连接成功,就可进行数据的收发,如果连接失败
可能是远程服务器还没有开启
1.首先服务端使用new Serversocket方法创建一个ServerSocket
2.bind()方法绑定到一个本地的ip和port,
3.acceot()监听到客户端的连接,此时服务器端处于阻塞状态,通常阻塞时间是无限大的
如果客户端数据到达,就可进行数据的收发
客户端代码
import java.io.*;
import java.net.Inet4Address;
import java.net.InetSocketAddress;
import java.net.Socket;
public class Client {
public static void main(String[] args) throws IOException {
Socket socket = new Socket();
socket.setSoTimeout(3000);
socket.connect(new InetSocketAddress(Inet4Address.getLocalHost(), 8000), 3000);
System.out.println("已发起服务器连接,并进入后续流程~");
System.out.println("客户端信息:" + socket.getLocalAddress() + " P:" + socket.getLocalPort());
System.out.println("服务器信息:" + socket.getInetAddress() + " P:" + socket.getPort());
try {
todo(socket);
} catch (Exception e) {
System.out.println("异常关闭");
}
socket.close();
System.out.println("客户端已退出~");
}
private static void todo(Socket client) throws IOException {
InputStream in = System.in;
BufferedReader input = new BufferedReader(new InputStreamReader(in));
OutputStream outputStream = client.getOutputStream();
PrintStream socketPrintStream = new PrintStream(outputStream);
InputStream inputStream = client.getInputStream();
BufferedReader socketBufferedReader = new BufferedReader(new InputStreamReader(inputStream));
boolean flag = true;
do {
String str = input.readLine();
socketPrintStream.println(str);
String echo = socketBufferedReader.readLine();
if ("bye".equalsIgnoreCase(echo)) {
flag = false;
}else {
System.out.println(echo);
}
}while (flag);
socketPrintStream.close();
socketBufferedReader.close();
}
}
服务端代码
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server {
public static void main(String[] args) throws IOException {
ServerSocket server = new ServerSocket(8000);
System.out.println("服务器准备就绪~");
System.out.println("服务器信息:" + server.getInetAddress() + " P:" + server.getLocalPort());
for (; ; ) {
Socket client = server.accept();
ClientHandler clientHandler = new ClientHandler(client);
clientHandler.start();
}
}
private static class ClientHandler extends Thread {
private Socket socket;
private boolean flag = true;
ClientHandler(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
super.run();
System.out.println("新客户端连接:" + socket.getInetAddress() +
" P:" + socket.getPort());
try {
PrintStream socketOutput = new PrintStream(socket.getOutputStream());
BufferedReader socketInput = new BufferedReader(new InputStreamReader(
socket.getInputStream()));
do {
String str = socketInput.readLine();
if ("bye".equalsIgnoreCase(str)) {
flag = false;
socketOutput.println("bye");
} else {
System.out.println(str);
socketOutput.println("回送:" + str.length());
}
} while (flag);
socketInput.close();
socketOutput.close();
} catch (Exception e) {
System.out.println("连接异常断开");
} finally {
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
System.out.println("客户端已退出:" + socket.getInetAddress() +
" P:" + socket.getPort());
}
}
}