客户机/服务器一对一通信模型

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网络编程实现客户机/服务器一对一通信模型，是在NetBeans IDE上进行操作的

【服务器代码】

package cn.edu.ldu;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.InetSocketAddress;import java.net.ServerSocket;import java.net.Socket;import java.net.SocketAddress;public class EchoServer {    public static void main(String[] args) throws IOException {       ServerSocket listenSocket=null;       Socket clientSocket=null;//会话套接字       BufferedReader in=null;//网络输入输出流       BufferedWriter out=null;              //1.启动服务器       listenSocket=new ServerSocket();       SocketAddress serverAddr=new InetSocketAddress("localhost",5000);       listenSocket.bind(serverAddr);        System.out.println("1.服务器启动成功");              //2.接受连接       clientSocket=listenSocket.accept();       System.out.println("2.服务器开始接受客户机链接...远程地址端口"               +clientSocket.getRemoteSocketAddress());              //3.创建输入输出流       in=new BufferedReader(new InputStreamReader(               clientSocket.getInputStream()));       out=new BufferedWriter(new OutputStreamWriter(               clientSocket.getOutputStream()));                     String recvStr=in.readLine();//服务器接收数据       System.out.println("3.1 服务器接收了来自客户机的:"+recvStr);       out.write(recvStr);       out.newLine();       out.flush();       System.out.println("3.2服务器回送了:"+recvStr);              //4.关闭流和套接字       if(in!=null)           in.close();       if(out!=null)           out.close();       if(clientSocket!=null)           clientSocket.close();       if(listenSocket!=null)           listenSocket.close();        System.out.println("4.服务器关闭了套接字和流！运行结束");    }  }

【客户机代码】

package cn.edu.ldu;import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStreamWriter;import java.net.InetSocketAddress;import java.net.ServerSocket;import java.net.Socket;import java.net.SocketAddress;public class EchoClient {    public static void main(String[] args) throws IOException {          Socket clientSocket=null;//会话套接字       BufferedReader in=null;//网络输入输出流       BufferedWriter out=null;              //1.启动客户机会话套接字       clientSocket=new Socket();       SocketAddress remoteAddr=new InetSocketAddress("localhost",5000);        System.out.println("1.创建客户机会话套接字成功");              //2.连接服务器       clientSocket.connect(remoteAddr);       System.out.println("2.客户机连接服务器成功！本地使用的地址端口："               +clientSocket.getLocalSocketAddress());              //3.创建输入输出流       in=new BufferedReader(new InputStreamReader(               clientSocket.getInputStream()));       out=new BufferedWriter(new OutputStreamWriter(               clientSocket.getOutputStream()));              String sendStr="有朋自远方来！";       out.write(sendStr);       out.newLine();       out.flush();        System.out.println("3.1客户机发送了："+sendStr);       String recvStr=in.readLine();       System.out.println("3.2 客户机收到了服务器的回送信息："+recvStr);              //4.关闭流和套接字       if(in!=null)           in.close();       if(out!=null)           out.close();       if(clientSocket!=null)           clientSocket.close();        System.out.println("4.服务器关闭了套接字和流！运行结束");    }    }

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