TCP通信
- tcp消息一发一收
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
/**
* 客服端
*/
public class ClinetDemo1 {
public static void main(String[] args) {
try {
System.out.println("客户端启动...");
// 创建socket 通信管道连接
String ip = "127.0.0.1";// 服务器端p
int port = 9999;// 服务端端口
Socket socket = new Socket(ip, port);
// 获取字节输出流
OutputStream os = socket.getOutputStream();
// 转换成打印流
PrintStream ps = new PrintStream(os);
// 输出数据
ps.println("我是客户端");
// 刷新数据
ps.flush();
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 服务端
*/
class ServerDemo1 {
public static void main(String[] args) {
try {
System.out.println("服务端启动...");
// 注册端口
int port = 9999;
ServerSocket serverSocket = new ServerSocket(port);
// 建立通信管道,阻塞等待接收客户端连接
Socket socket = serverSocket.accept();
// 读取管道数据字节流
InputStream is = socket.getInputStream();
// 字节流转换缓冲字符流
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// 读取消息
String msg;
if ((msg = br.readLine()) != null) {
System.out.println(socket.getRemoteSocketAddress() + " 消息:" + msg);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
- tcp消息多发多收,只能处理一个客户端
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
/**
* 客服端
*/
public class ClinetDemo2 {
public static void main(String[] args) {
try {
System.out.println("客户端启动...");
// 创建socket 通信管道连接
String ip = "127.0.0.1";// 服务器端p
int port = 9999;// 服务端端口
Socket socket = new Socket(ip, port);
// 获取字节输出流
OutputStream os = socket.getOutputStream();
// 转换成打印流
PrintStream ps = new PrintStream(os);
// 输出数据
Scanner sc = new Scanner(System.in);
while (true) {
System.out.println("请输入:");
String msg = sc.nextLine();
ps.println(msg);
// 刷新数据
ps.flush();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 服务端
*/
class ServerDemo2 {
public static void main(String[] args) {
try {
System.out.println("服务端启动...");
// 注册端口
int port = 9999;
ServerSocket serverSocket = new ServerSocket(port);
// 建立通信管道,阻塞等待接收客户端连接
Socket socket = serverSocket.accept();
// 读取管道数据字节流
InputStream is = socket.getInputStream();
// 字节流转换缓冲字符流
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// 读取消息
String msg;
while ((msg = br.readLine()) != null) {
System.out.println(socket.getRemoteSocketAddress() + " 消息:" + msg);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
- tcp消息多发多收,处理多个客户端
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Scanner;
/**
* 服务端
*/
class ServerDemo3 {
public static void main(String[] args) {
try {
System.out.println("服务端启动...");
// 注册端口
int port = 9999;
ServerSocket serverSocket = new ServerSocket(port);
// 定义主线线程,负责接收socket管道
while (true) {
// 建立通信管道,阻塞等待接收客户端连接
Socket socket = serverSocket.accept();
// 子线程处理多个客户端
new ServerReaderThread(socket).start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 服务端,线程类
*/
class ServerReaderThread extends Thread{
private Socket socket;
public ServerReaderThread(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
try {
// 读取管道数据字节流
InputStream is = socket.getInputStream();
// 字节流转换缓冲字符流
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// 读取消息
String msg;
while ((msg = br.readLine()) != null) {
System.out.println(socket.getRemoteSocketAddress() + " 消息:" + msg);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
- tcp消息多发多收,线程池处理多个客户端
/**
* 服务端
*/
class ServerDemo4 {
// 使用静态变量记住一个线程池对象
private static ExecutorService pool = new ThreadPoolExecutor(3, 5,6,TimeUnit.SECONDS, new ArrayBlockingQueue<>(2), Executors.defaultThreadFactory(),new ThreadPoolExecutor.AbortPolicy());
public static void main(String[] args) {
try {
System.out.println("服务端启动...");
// 注册端口
int port = 9999;
ServerSocket serverSocket = new ServerSocket(port);
// 定义主线线程,负责接收socket管道
while (true) {
// 建立通信管道,阻塞等待接收客户端连接
Socket socket = serverSocket.accept();
// 线程池处理多个客户端
Runnable target = new ServerReaderRunnable(socket);
pool.execute(target);
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 任务类
*/
class ServerReaderRunnable implements Runnable{
private Socket socket;
public ServerReaderRunnable(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
try {
// 读取管道数据字节流
InputStream is = socket.getInputStream();
// 字节流转换缓冲字符流
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// 读取消息
String msg;
while ((msg = br.readLine()) != null) {
System.out.println(socket.getRemoteSocketAddress() + " 消息:" + msg);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
即时通信
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
/**
* 客服端
*/
public class ClinetDemo5 {
public static void main(String[] args) {
try {
System.out.println("客户端启动...");
// 创建socket 通信管道连接
String ip = "127.0.0.1";// 服务器端p
int port = 9999;// 服务端端口
Socket socket = new Socket(ip, port);
// 独立线程接收服务端消息
new ClinetReaderThread5(socket).start();
// 获取字节输出流
OutputStream os = socket.getOutputStream();
// 转换成打印流
PrintStream ps = new PrintStream(os);
// 输出数据
Scanner sc = new Scanner(System.in);
while (true) {
System.out.println("请输入:");
String msg = sc.nextLine();
ps.println(msg);
// 刷新数据
ps.flush();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 独立线程接收服务端消息
*/
class ClinetReaderThread5 extends Thread{
private Socket socket;
public ClinetReaderThread5(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
try {
// 读取管道数据字节流
InputStream is = socket.getInputStream();
// 字节流转换缓冲字符流
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// 读取消息
String msg;
while ((msg = br.readLine()) != null) {
System.out.println(socket.getRemoteSocketAddress()+ "收到消息:" + msg);
}
} catch (Exception e) {
System.out.println("服务器异常");
}
}
}
/**
* 服务端
*/
class ServerDemo5 {
// 存储所有在线socket 管道
public static List<Socket> allOnlineSockets = new ArrayList<>();
public static void main(String[] args) {
try {
System.out.println("服务端启动...");
// 注册端口
int port = 9999;
ServerSocket serverSocket = new ServerSocket(port);
// 定义主线线程,负责接收socket管道
while (true) {
// 建立通信管道,阻塞等待接收客户端连接
Socket socket = serverSocket.accept();
// 上线添加
allOnlineSockets.add(socket);
// 子线程处理多个客户端
new ServerReaderThread5(socket).start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
/**
* 服务端,线程类
*/
class ServerReaderThread5 extends Thread{
private Socket socket;
public ServerReaderThread5(Socket socket) {
this.socket = socket;
}
@Override
public void run() {
try {
// 读取管道数据字节流
InputStream is = socket.getInputStream();
// 字节流转换缓冲字符流
BufferedReader br = new BufferedReader(new InputStreamReader(is));
// 读取消息
String msg;
while ((msg = br.readLine()) != null) {
System.out.println(socket.getRemoteSocketAddress() + " 消息:" + msg);
// 端口转发
sendMsgToAll(msg);
}
} catch (Exception e) {
System.out.println(socket.getRemoteSocketAddress() + "下线");
// 下线移除
ServerDemo5.allOnlineSockets.remove(socket);
}
}
/**
* 端口转化数据
* @param msg
* @throws Exception
*/
private void sendMsgToAll(String msg) throws Exception {
for (Socket socket : ServerDemo5.allOnlineSockets) {
PrintStream ps = new PrintStream(socket.getOutputStream());
ps.println(msg);
ps.flush();
}
}
}