前言

      用ServerSocket和Socket做了个Server、Client通信的demo，以及学习下在这个demo过程中用到java.net、java.io包下几个常用的类。

Server

import java.net.*;import java.io.*;public class HttpServer{    
    public static void main(String[] args){        new HttpServer().start();
    }    
    private ServerSocket serversocket=null;    
    public HttpServer(){        try{
            serversocket=new ServerSocket(5000);//监听客户端端口5000的socket请求
            System.out.println("服务器启动");
        }catch(IOException e){
            e.printStackTrace();
        }
    }    public void start(){
        Socket socket=null;        while(true){            try{

                socket=serversocket.accept(); //接受客户端请求socket
                System.out.println("address:"+socket.getInetAddress()+":"+socket.getLocalPort());

                
                OutputStream os =socket.getOutputStream();
                BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(os));                //向客户端发送一条消息
                bw.write("测试服务器通信\n");
                bw.flush();

            }catch(IOException e){
                e.printStackTrace();
                System.out.println("连接断开");
            }finally{                try{                    if(socket !=null){
                        socket.close();
                    }
                }catch(IOException e){
                    
                }
            }
        }
    }
}

Client

import java.net.*;import java.io.*;public class Client{    
    public static void main(String[] args){
        Socket socket=null;        try{
            socket =new Socket("127.0.0.1",5000);
            
            
            InputStream is =socket.getInputStream();
            InputStreamReader isr=new InputStreamReader(is);
            BufferedReader br =new BufferedReader (isr);
            String mess=br.readLine();
            
            System.out.println("mess:"+mess);
        }catch(IOException e){
            e.printStackTrace();
        }finally{            try{                if(socket !=null){
                    socket.close();
                }
            }catch(IOException e){
                
            }
        }
        
    }
    
}

 总结

     java.net包内几个常用的类: 

         ServerSocket、

         Socket、

         OutputStream、InputStream、

　　   InputStreamReader、OutputStreamWriter、

　　   BufferedReader、BufferedWriter、 

         InetAddress、

ServerSocket和Socket