Socket多客户端通信

来源：互联网发布：织梦淘宝客模板编辑：程序博客网时间：2024/06/03 15:03

主要思路

服务端打开端口，客户端连接指定端口，双方打开IO流，之间进行通信

写在最后

通过 accept = serverSocket.accept();是否执行完毕判断有用户连接，因为可能多个用户连接，所以while轮询，此时可以将用户Socket保存下来，方便后期进行通讯。
注意点是在进行通信时发送方发送完数据不能关闭IO流，关闭IO将不能继续通信，而要flush流，将数据发送出去。在调用close方法时会自动flush。
接受数据时用InputStream接受字节流时不会出现length=-1这种情况，因为通道一直打开。并没有关闭。所以要一直读即可。

贴上代码

MyService

import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.ServerSocket;import java.net.Socket;import java.util.ArrayList;public class MyService {    public static void main(String[] args) {        ServerSocket serverSocket = null;        InputStream inputStream = null;        OutputStream outputStream = null;        ArrayList<Socket> arrayList=new ArrayList<Socket>();        Socket accept = null;        byte[] bytes = null;        try {            serverSocket = new ServerSocket(8888);            System.out.println("服务端已打开");            while (true) {                accept = serverSocket.accept();                arrayList.add(accept);                System.out.println("客户端连接成功");//                new Thread(new ServiceSend(accept)).start();                new Thread(new ServiceReceive(accept,arrayList)).start();            }        } catch (IOException e) {            e.printStackTrace();        } finally {            if (serverSocket != null) {                try {                    serverSocket.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if (inputStream != null) {                try {                    inputStream.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if (outputStream != null) {                try {                    outputStream.close();                } catch (IOException e) {                    e.printStackTrace();                }            }            if (accept != null) {                try {                    accept.close();                } catch (IOException e) {                    e.printStackTrace();                }            }        }    }}

ServiceReceive

import java.io.*;import java.net.Socket;import java.util.ArrayList;public class ServiceReceive implements Runnable{    Socket socket=null;    InputStream inputStream=null;    byte[] bytes =new byte[1024];    ArrayList arrayList=null;    String str;    int length;    public ServiceReceive(Socket socket,ArrayList arrayList) {        this.socket = socket;        this.arrayList=arrayList;    }    @Override    public void run() {        try {            inputStream=socket.getInputStream();            length=inputStream.read(bytes);            while (length!=-1){                System.out.println(new String(bytes));                new SendGroup(socket,arrayList,bytes).run();                length=inputStream.read(bytes);            }        } catch (IOException e) {            e.printStackTrace();        }    }}

ServiceSend

import java.io.*;import java.net.Socket;public class ServiceSend implements Runnable{    Socket socket=null;    OutputStream outputStream=null;    byte[] bytes=new byte[1024];    public ServiceSend(Socket socket) {        this.socket = socket;    }    @Override    public void run() {        try {            while (true) {                outputStream = socket.getOutputStream();                System.out.println("服务端发送线程开始工作");                BufferedReader bufferedReader=new BufferedReader(new InputStreamReader(System.in));                String str=bufferedReader.readLine();                outputStream.write(str.getBytes());                outputStream.flush();            }        } catch (IOException e) {            e.printStackTrace();        }finally {            try {                outputStream.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }}

SendGroup

import java.io.IOException;import java.io.InputStream;import java.io.OutputStream;import java.net.Socket;import java.util.ArrayList;public class SendGroup implements Runnable{    ArrayList arrayList=null;    Socket socket=null;    byte[] bytes=null;    Socket parentsocket=null;    public SendGroup(Socket parentsocket,ArrayList arrayList, byte[] bytes) {        this.arrayList = arrayList;        this.bytes=bytes;        this.parentsocket=parentsocket;    }    @Override    public void run() {        for (int i=0;i<arrayList.size();i++){            socket= (Socket) arrayList.get(i);            if (socket==parentsocket)                continue;            try {                OutputStream outputStream = socket.getOutputStream();                outputStream.write(bytes);                outputStream.flush();            } catch (IOException e) {                e.printStackTrace();            }        }    }}

MyClient

import java.io.*;import java.net.Socket;public class MyClient {    public static void main(String[] args) {      Socket socket=null;      OutputStream outputStream=null;        try {            socket=new Socket("127.0.0.1",8888);            new Thread(new ClientReceive(socket)).start();            new Thread(new ClientSend(socket)).start();        } catch (IOException e) {            e.printStackTrace();        }    }}

ClientSend

import java.io.*;import java.net.Socket;public class ClientSend implements Runnable {    Socket socket = null;    OutputStream outputStream = null;    byte[] bytes = new byte[1024];    public ClientSend(Socket socket) {        this.socket = socket;    }    @Override    public void run() {        try {            while (true) {                outputStream = socket.getOutputStream();                BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));                String str = bufferedReader.readLine();                outputStream.write(str.getBytes());                outputStream.flush();            }        } catch (IOException e) {            e.printStackTrace();        }    }}

ClientReceive

import java.io.*;import java.net.Socket;public class ClientReceive implements Runnable {    Socket socket = null;    InputStream inputStream = null;    byte[] bytes = new byte[1024];    String str;    int length;    public ClientReceive(Socket socket) {        this.socket = socket;    }    @Override    public void run() {        try {            while (true){                System.out.println("客户端接受线程开始工作");                inputStream =socket.getInputStream();                length=inputStream.read(bytes);                while (length!=-1){                    System.out.println(new String(bytes));                    length=inputStream.read(bytes);                }            }        } catch (IOException e) {            e.printStackTrace();        }finally {            try {                inputStream.close();            } catch (IOException e) {                e.printStackTrace();            }        }    }}

阅读全文

0 0