Socket 多线程通信

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Socket 通信

1-Socket：socket的通信建立，由两部分来实现，分别是：ServerSocket 和 Socket；ServerSocket负责监听（accept）Socket端的连接请求，并接收数据流（根据指定 port 和 host）；在ServerSocket端也建立一个Socket来和Socket端进行通信；

服务端实现-

package com.bdc;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;import java.util.Scanner;public class SocketChatServers {private int port;//设置 连接 端口public  SocketChatServers(int port){this.port = port;}//业务处理public void service() throws IOException{int i = 0;ServerSocket serverSocket = new ServerSocket(port,3);//建立 Socket 服务while(true){Socket socket = serverSocket.accept();//等待 Socket 连接System.out.println("第"+(++i)+"个客户已连接...");new ServerSocketThread(socket).start();}}public static void main(String[] args) throws IOException {new SocketChatServers(9001).service();}}  class ServerSocketThread extends Thread{private Socket socket ;public ServerSocketThread(Socket socket){this.socket = socket;}@Overridepublic void run(){DataInputStream dis = null;DataOutputStream dos = null;try {dis = new DataInputStream(socket.getInputStream());dos = new DataOutputStream(socket.getOutputStream());Scanner scan = new Scanner(System.in);while(true){String sendToClient = scan.nextLine();dos.writeUTF(sendToClient);System.out.println("服务器 说:"+sendToClient);String accept = dis.readUTF();System.out.println("客户端 说"+accept);}} catch (IOException e) {e.printStackTrace();}finally{try {dis.close();dos.close();socket.close();} catch (IOException e) {e.printStackTrace();}}}}

客户端实现-

</pre></p><p align="left"><span style="font-size:18px;"><span style="font-size:24px;"><span style="font-size:18px;"></span></span></span><pre name="code" class="java">package com.bdc;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.ConnectException;import java.net.Socket;import java.net.UnknownHostException;import java.util.Scanner;public class SocketChatClient {private String host;//主机 ipprivate int port;//连接 端口public SocketChatClient(String host,int port){this.host = host;this.port = port;}public void client() throws ConnectException{Socket socket = null ;//建立 Socket 连接DataInputStream dis = null;DataOutputStream dos = null;try {socket = new Socket(host,port);//连接 Socket服务器dis = new DataInputStream(socket.getInputStream());dos = new DataOutputStream(socket.getOutputStream());Scanner scan = new Scanner(System.in);while(true){String sendToServer = scan.nextLine();dos.writeUTF(sendToServer);System.out.println("客户端 说: "+sendToServer);String accept = dis.readUTF();System.out.println("服务器 说: "+accept);}}catch (ConnectException e) {System.err.println("**** 连接 异常 ****");}catch(IOException e){System.err.println("**** IO 异常 ****");}finally{ try {dis.close();dos.close();socket.close();} catch (IOException e) {e.printStackTrace();}}}public static void main(String[] args) {Scanner scan = new Scanner(System.in);System.err.println("请输入要登录的host :");String host = scan.nextLine();System.err.println("请输入连接 Port :");int port = scan.nextInt();try {new SocketChatClient(host, port).client();} catch (ConnectException e) {System.err.println("**** 连接 异常 ****");}}}

请输入要登录的host :
localhost
请输入连接 Port :
9001
hello

客户端说: hello

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