客户端：
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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
public class MyClient {
public static void main(String[] args) throws Exception{
Socket socket = null;
BufferedReader in = null;
PrintWriter out = null;
BufferedReader input = null;
// 请求指定ip和端口号的服务器
socket = new Socket("127.0.0.1",3333);
while(true){
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
out = new PrintWriter(socket.getOutputStream(), true);
// 接收控制台的输入
input = new BufferedReader(new InputStreamReader(System.in));
// out.println("this is client info!");
String info = input.readLine();
out.println(info);
String str = in.readLine();
System.out.println("客户端显示--》服务器的信息：" + str);
}
//in.close();
//out.close();
}
}
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服务端：
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import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class MyServices {
public static void main(String[] args) throws Exception{
ServerSocket ss = null;
Socket socket = null;
BufferedReader in = null;
PrintWriter out = null;
BufferedReader input = null;
// 监听3333端口
ss = new ServerSocket(3333);
// 等待接收客户端的请求
socket = ss.accept();
while(true){
// 获取连接对象的输入流
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
// 获取客户端的输入信息
String str = in.readLine();
input = new BufferedReader(new InputStreamReader(System.in));
System.out.println("服务器显示-->客户端输入数据：" + str);
out = new PrintWriter(socket.getOutputStream(),true);
// 将数据输出到客户端
// out.println("hehe");
String info = input.readLine();
out.println(info);
}
// in.close();
// out.flush();
// out.close();
}
}
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客户端：
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import java.net.DatagramPacket;
import java.net.DatagramSocket;
public class UDPClient {
public static void main(String[] args) throws Exception {
DatagramSocket ds = null;
DatagramPacket dp = null;
byte[] buf = new byte[1024];
ds = new DatagramSocket(3333);
dp = new DatagramPacket(buf, 1024);
// 接收数据，放入数据报
ds.receive(dp);
// 从数据报中取出数据
String info = new String(dp.getData(),0, dp.getLength());
System.out.println("接收到的信息是：" + info);
}
}
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服务端：
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import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetAddress;
public class UDPServer {
public static void main(String[] args) throws Exception {
DatagramSocket ds = null;
DatagramPacket dp = null;
// 构建发送对象
ds = new DatagramSocket();
// 将数据打包-->打成数据报
String info = "hello world!";
dp = new DatagramPacket(info.getBytes(), info.length(), InetAddress.getByName("localhost"),3333);
// 发出数据报
ds.send(dp);
}
}
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