【文件属性】：
文件名称：java网络编程示例
文件大小：32KB
文件格式：DOC
更新时间：2016-12-30 16:15:27
java
Java 网络编程
说明：
网络编程，分为两种一种是TCP、另一种是UDP方式。我们分别写一下TCP、UDP端的Server和Client简单演示代码。
TCP：
Sever
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class TCPServer {
public static void main(String[] args) {
try {
ServerSocket socket = new ServerSocket(4444);
while (true) {
Socket sc =socket.accept();
InputStream instr = sc.getInputStream();
DataInputStream dataInputStream = new DataInputStream(instr);
System.out.println(dataInputStream.readUTF());
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
Client
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.Socket;
import java.net.UnknownHostException;
public class TCPClient {
public static void main(String[] args) {
try {
Socket socket = new Socket("127.0.0.1",4444);
OutputStream oStream = socket.getOutputStream();
DataOutputStream dataOutputStream = new DataOutputStream(oStream);
dataOutputStream.writeUTF("Hello");
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
UDP：
Server：
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.SocketException;
public class UDPServer {
public static void main(String[] args) {
try {
byte [] buffer = new byte[1024];
DatagramSocket socket = new DatagramSocket(4444);
DatagramPacket packet = new DatagramPacket(buffer, buffer.length);
while(true){
socket.receive(packet);
System.out.println(new String(buffer,0,packet.getLength()));
}
} catch (SocketException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Client
import java.io.IOException;
import java.net.DatagramPacket;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketException;
public class UDPClient {
public static void main(String[] args) {
byte [] buffer = null;
buffer = new String("hello").getBytes();
DatagramPacket packet=null;
try {
packet = new DatagramPacket(buffer, buffer.length,new InetSocketAddress("127.0.0.1", 4444));
DatagramSocket socket = new DatagramSocket(1234);
socket.send(packet);
socket.close();
} catch (SocketException e1) {
e1.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}