谈一谈socket与java

用java中socket实现socket聊天

1,      什么是socket

Socket 是指网络套接字,什么是套接字呢?    这是网络上一种端对端的网络协议,端口就是进程号,socket在网络中让这两个端通信形成端口直接通信,所以socket的参数可想而知就是两端ip和端口号了;

再说在网络中,总要有人付出,要在网络中等着别人链接,不然的话你一点想连别人,别人在两点想连你,怎么也不可能连上,总有哟个人需要做等待的角色,这个角色就是服务端也就是serverSocket,他在网络中提供一个固定的ip和端口号套接字;

2,      在Java中实现socket接口

在Java中提供了两个用来建立socket链接都在java.net包中,在客户端要用Socket(addr,port)//参数是远程服务的地址和端口号;另一个在服务端中用ServerSocket(port) 建立一个等待的socket端,同时使用serversocket.accept() 在服务端动态等待并接受一个前来请求链接的socket请求

一旦serversocket.accept()方法获得一个链接,就会封装出一个Socket对象服务端可用这个对象,获得客户端的信息并向客户端发送信息;话不多说,上代码;

  

package testpackage;
/*
 * @author:mayeye
 * @about:服务端
 * */
import java.net.*;
import java.io.*;

public class TestServer {
    public static void main(String[] args) {
        //try {
            System.out.println("=============================");
            ServerSocket server=null;
            try {
                server=new ServerSocket(1233);
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            Socket client = null;
            try {
                client = server.accept();
                System.out.println("ip为:"+client.getInetAddress()+"的客户端链接了");
                System.out.println("port为:"+client.getPort()+"的客户端链接了");
                System.out.println("Localport为:"+client.getLocalPort()+"的客户端链接了");

            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            String line = null;
            BufferedReader is = null;
            try {
                is = new BufferedReader(new InputStreamReader(client.getInputStream()));
            } catch (IOException e1) {
                // TODO Auto-generated catch block
                e1.printStackTrace();
            }
            PrintWriter os = null;
            try {
                os = new PrintWriter(client.getOutputStream());
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));
            try {
                System.out.println("Client:"+is.readLine());
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            try {
                line=sin.readLine();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            
            while(!line.equals("bye")){
                os.println(line);
                os.flush();
                System.out.println("Server:"+line);    
                try {
                    System.out.println("Client:"+is.readLine());
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
                try {
                    line=sin.readLine();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }
            os.close();
            try {
                is.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            try {
                client.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            try {
                server.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
            System.out.println("********************************");
        /*}catch(Exception e) {
            System.out.println("-------------------------------");
        }*/
    }
}

上面是服务端代码

package testpackage;
import java.net.*;
import java.io.*;
public class testsocket {
    public static void main(String[] args) {
        try {
            Socket client=new Socket("127.0.0.1",1233);
            BufferedReader sin=new BufferedReader(new InputStreamReader(System.in));//构建一个标准输入流
            PrintWriter os=new PrintWriter(client.getOutputStream());
            BufferedReader is=new BufferedReader(new InputStreamReader(client.getInputStream()));//由client对象构造一个输入流
            String readline;
            System.out.println("ip为:"+client.getInetAddress()+"的客户端链接了");
            readline=sin.readLine();
            while(!readline.equals("bye")) {
                os.println(readline);
                os.flush();
                System.out.println("Client:"+readline);
                System.out.println("---*****************---");
                System.out.println("Server:"+is.readLine()); 
                readline=sin.readLine(); //从系统标准输入读入一字符串s
            }
            os.close();
            is.close();
            client.close();

        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            System.out.print("====================找不到主机名");
        } catch (IOException e) {
            System.out.print("===================IO错误");
        }
        
    }
}

上面是服务端代码;

大家都是成年人,所以目录结构就不用我说了吧

这只是用java实现了一个最简易的socket聊天,必须一问一答,而且没有界面;

预告一下,下一篇博客我将接介绍界面的解决方案;

原文地址:https://www.cnblogs.com/mayeye/p/9571740.html