socket编程Demo

摘要: 温故知新 socket demo

客户端代码：

package com.company.bio;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class Client {

final static String ADDRESS = "127.0.0.1";
final static int PORT = 8765;

public static void main(String[] args) {

Socket socket = null;
BufferedReader in = null;
PrintWriter out = null;

try {
socket = new Socket(ADDRESS, PORT);
//阅读接收的数据
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream(), true);

//向服务器端发送数据
out.println("这是客户端给服务端的数据");
String response = in.readLine();
System.out.println("Client: " + response);

} catch (Exception e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (out != null) {
try {
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}

服务端代码：

package com.company.bio;

import com.company.bio.ServerHandler;

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

public class Server {

final static int PROT = 8765;

public static void main(String[] args) {

ServerSocket server = null;
try {
server = new ServerSocket(PROT);
System.out.println(" server start .. ");
//进行阻塞
Socket socket = server.accept();
//新建一个线程执行客户端的任务
new Thread(new ServerHandler(socket)).start();

} catch (Exception e) {
e.printStackTrace();
} finally {
if (server != null) {
try {
server.close();
} catch (IOException e) {
e.printStackTrace();
}
}
server = null;
}

}

}

服务端处理逻辑：

package com.company.bio;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;

public class ServerHandler implements Runnable {

private Socket socket;

public ServerHandler(Socket socket) {
this.socket = socket;
}

@Override
public void run() {
BufferedReader in = null;
PrintWriter out = null;
try {
//阅读接收到的数据
in = new BufferedReader(new InputStreamReader(this.socket.getInputStream()));
//返回输出结果
out = new PrintWriter(this.socket.getOutputStream(), true);
String body = null;
while (true) {
body = in.readLine();
if (body == null) break;
System.out.println("Server :" + body);
out.println("这是服务端给客户端的数据");
}

} catch (Exception e) {
e.printStackTrace();
} finally {
if (in != null) {
try {
in.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (out != null) {
try {
out.close();
} catch (Exception e) {
e.printStackTrace();
}
}
if (socket != null) {
try {
socket.close();
} catch (IOException e) {
e.printStackTrace();
}
}
socket = null;
}

}

}

先启动服务端, 再启动 客户端,非常简单的demo已经有点忘了 先记一下

根据这个demo我们知道一个socket建立大致需要这四个步骤：

1 服务器监听

2 客户端请求

3 服务端确认

4客户端确认

PS:耻于表达，羞于表达,用编程麻痹自己 ,反正也没有人看。