基于TCP编程

来源:互联网 发布:李明老师的linux视频 编辑:程序博客网 时间:2024/06/16 01:26

TCP协议:面向连接的,效率较低,需要等待回应后才能继续发送数据。类似于现实中的打电话,当你在向他人打电话时,在播出号码后你都必须等待电话另一边的回应,而在这段时间里,除了等待回应不能做任何的事情。
1.基于单线程,只能有一个客户端向服务器发送请求。
第一步:客户端发送数据给服务器端;
第二步:服务器端接受来自客户端的信息;
第三步:服务器端对客户端做出回应;
第四步:客户端接受接受服务器端的回应。
参考的代码如下:

服务器端:>package com.geminno.text15;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;public class MyServer {    public static void main(String[] args) {        //创建服务器端套接字        ServerSocket server =null;        DataInputStream dis=null;        DataOutputStream dos=null;        Socket client=null;        try {            server=new ServerSocket(8888);            //设置监听            client=server.accept();            //获取客户端的输入流,用来读取客户端发来的数据            dis=new DataInputStream(client.getInputStream());            dos=new DataOutputStream(client.getOutputStream());            while(true){                String s=dis.readUTF();                System.out.println("接受来自客户端的信息--->"+s);                dos.writeUTF(s);            }        } catch (IOException e) {        System.out.println("");        }finally{            try {                dis.close();            } catch (IOException e) {                e.getMessage();            }finally{                try {                    server.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        }    }}
客户端:> package com.geminno.text15;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.Socket;import java.net.UnknownHostException;public class MyClient {    public static void main(String[] args) {        Socket client=null;        DataOutputStream oos=null;        DataInputStream dis=null;        try {            //创建客户端套接字            client=new Socket("127.0.0.1",8888);            oos=new DataOutputStream(client.getOutputStream());            dis=new DataInputStream(client.getInputStream());            for (int i = 0; i < 10; i++) {                oos.writeUTF("hello--->"+i);                 System.out.println("回应:"+dis.readUTF());            }        } catch (UnknownHostException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }finally{            if(oos!=null){                try {                    oos.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }finally{                    try {                        client.close();                    } catch (IOException e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    }                }            }        }           }}

2、基于多线程。服务器端将数据交给线程来处理,这样服务器就能同时处理多条请求,提高效率。

服务器端:>package com.geminno.text15.tcp1;import java.io.IOException;import java.net.ServerSocket;import java.net.Socket;public class MyServer {    public static void main(String[] args) {        ServerSocket server=null;//服务器端套接字        Socket client=null;        try {            server=new ServerSocket(8080);            //等待客户端链接            while(true){                 client=server.accept();                //交给线程处理                ServerThread st=new ServerThread(client);                new Thread(st).start();                 }        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }finally{            try {                client.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }finally{                try {                    server.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        }    }       }
线程:> package com.geminno.text15.tcp1;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.Socket;public class ServerThread implements Runnable {    Socket client;    public ServerThread(Socket client) {        super();        this.client = client;    }    @Override    public void run() {        DataInputStream dis = null;        DataOutputStream dos = null;        String name = Thread.currentThread().getName();        try {            dis = new DataInputStream(client.getInputStream());            dos = new DataOutputStream(client.getOutputStream());            while (true) {                String s = dis.readUTF();                System.out.println("接受来自客户端" + name + "的信息" + s);                dos.writeUTF(s.length() + "");            }        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {            try {                dos.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } finally {                try {                    dis.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                }            }        }    }}
客户端:这里的写法与单线程的没有区别。> package com.geminno.text15.tcp1;import java.io.DataInputStream;import java.io.DataOutputStream;import java.io.IOException;import java.net.Socket;import java.util.Scanner;public class MyClient {    public static void main(String[] args) {        Socket client = null;//客户端套接字        DataInputStream dis = null;//接受来自服务器端的信息        DataOutputStream dos = null;//发送数据给服务器端        @SuppressWarnings("resource")        Scanner sc = new Scanner(System.in);        try {            client = new Socket("127.0.0.1", 8080);            //127.0.0.1:服务器的IP地址 8080:要连接的服务器的端口号            dos = new DataOutputStream(client.getOutputStream());            dis = new DataInputStream(client.getInputStream());            while (true) {                System.out.print("请输入信息:");                String s = sc.nextLine();                dos.writeUTF(s);                String str = dis.readUTF();                System.out.println("接受 来自服务器端的回应---->"+str);            }        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } finally {            try {                dis.close();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } finally {                try {                    dos.close();                } catch (IOException e) {                    // TODO Auto-generated catch block                    e.printStackTrace();                } finally {                    try {                        client.close();                    } catch (IOException e) {                        // TODO Auto-generated catch block                        e.printStackTrace();                    }                }            }        }    }}
原创粉丝点击