分布式服务器客户端实验

 

服务器端Socket程序

package com.aaa.servet;

 

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.net.ServerSocket;//导入java.net包，用于网络通讯

import java.net.Socket;

 

public class ServetSocketTest {

public static void main(String[] args) {

System.out.println("...启动服务器...");

//1.初始化服务端Socket并绑定端口为8888

try {

ServerSocket serverSocket=new ServerSocket(8888);//需要添加try/catch块

//2.等待客户端的连接

Socket socket=serverSocket.accept();

//3.获取输入流,通过socket对象流，传递给缓冲字符流进行读取;

BufferedReader bufferReader=new BufferedReader(new InputStreamReader(socket.getInputStream()));

//4.读取一行数据;

String str=bufferReader.readLine();

//5.输出打印

System.out.println(str);

} catch (IOException e) {

e.printStackTrace();

}

}

}

1. 客户端程度代码

package com.aaa.clicent;

 

import java.io.BufferedWriter;

import java.io.IOException;

import java.io.OutputStreamWriter;

import java.net.Socket;

import java.net.UnknownHostException;

 

public class ClientSocket {

public static void main(String[] args) {

//1.创建socket对象，建立到服务i端的连接;

try {

Socket socket=new Socket("127.0.0.1",8888);

//2.通过缓冲输出流，包装下socket对象的输出字节流，进行写操作;

BufferedWriter bufferWriter=new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));

//3.构造字符串，写进去

String str="你是我的小心肝";

bufferWriter.write(str);

//3.2还需要将缓冲中的内容放到socket

bufferWriter.flush();

//4.注意一定要有关闭连接;

socket.shutdownOutput();

} catch (UnknownHostException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

 

}

}

1. 案例效果：
3.  

 

5.现在需要继续升级，如何循环！！！可以多个循环；

服务器端修改为：

客户端修改为：

 

--------UDP Socket连接---

import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
import java.net.SocketException;

public class UDPServer {
    public static void main(String[] args) {
        //1.创建服务器端的DatagramSocket数据包，
        try {
            DatagramSocket datagramSocket=new DatagramSocket(8800);
            //2.创建数据报，用于接受用户传送过来的数据；存放于字节数组;
            byte[]bytes=new byte[1024];
            DatagramPacket datagramPacket=new DatagramPacket(bytes,bytes.length);
            System.out.println("*****服务器端已经启动****");
            //使用receive方法接受;
            datagramSocket.receive(datagramPacket);
            //4.读取数据;
            String info=new String(bytes,0,datagramPacket.getLength());
            //5.输出信息;
            System.out.println("服务器,客户端信息为："+info);
            //升级，服务器端响应客户端;
            InetAddress address=datagramPacket.getAddress();
            int port=datagramPacket.getPort();
            byte[]sinfo="欢迎您".getBytes();
            //升级2.创建数据报，包含socket信息;
            DatagramPacket packet=new DatagramPacket(sinfo,sinfo.length,address,port);
            // 升级3;
            datagramSocket.send(packet);
            //关闭资源;
            datagramSocket.close();
        } catch (SocketException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }
}

==客户端

import java.io.IOException;
import java.net.*;

public class UDPClient {
    public static void main(String[] args) {
        //1.定义服务器的地址、端口号、数据;
        try {
            InetAddress address=InetAddress.getByName("localhost");
            int port=8800;
            byte[]data="用户名：admin,密码：123".getBytes();
            //2.创建数据报，包含发送的数据信息，可以使用带有4个参数的方法;
            DatagramPacket datagramPacket=new DatagramPacket(data,data.length,address,port);
            //3.创建DatagramSocket对象；
            DatagramSocket datagramSocket=new DatagramSocket();
            //4.向服务器发送数据；
            datagramSocket.send(datagramPacket);
            ////升级
            byte[]data2=new byte[1024];
            DatagramPacket packet2=new DatagramPacket(data2,data2.length);
            //2.接受服务器响应的数据 ；
            datagramSocket.receive(packet2);
            //3.读取数据；
            String reply=new String(data2,0,packet2.getLength());
            System.out.println("我是客户端，服务器端说："+reply);
            //4.关闭资源;
            datagramSocket.close();
        } catch (UnknownHostException e) {
            e.printStackTrace();
        } catch (SocketException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}