1.socket的TCP通信
客户端:
import java.io.FileInputStream; import java.io.InputStream; import java.io.OutputStream; import java.net.Socket; public class TCPClient { public static void main(String[] args) { try { //创建一个Socket对象,指定服务器端的IP地址和端口号 Socket socket = new Socket("192.168.1.104",4567); //使用InputStream读取硬盘上的文件 InputStream inputStream = new FileInputStream("f://file/words.txt"); //从Socket当中得到OutputStream OutputStream outputStream = socket.getOutputStream(); byte buffer [] = new byte[4*1024]; int temp = 0 ; //将InputStream当中的数据取出,并写入到OutputStream当中 while((temp = inputStream.read(buffer)) != -1){ outputStream.write(buffer, 0, temp); } outputStream.flush(); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
服务器端:
import java.io.IOException; import java.io.InputStream; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.ServerSocket; import java.net.Socket; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class SocketActivity extends Activity { /** Called when the activity is first created. */ private Button startButton = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); startButton = (Button)findViewById(R.id.startListener); startButton.setOnClickListener(new StartSocketListener()); } class StartSocketListener implements OnClickListener{ @Override public void onClick(View v) { new ServerThread().start(); } } class ServerThread extends Thread{ public void run(){ //声明一个ServerSocket对象 ServerSocket serverSocket = null; try { //创建一个ServerSocket对象,并让这个Socket在4567端口监听 serverSocket = new ServerSocket(4567); //调用ServerSocket的accept()方法,接受客户端所发送的请求 Socket socket = serverSocket.accept();//accept是个阻塞方法,不用担心nullException //从Socket当中得到InputStream对象 InputStream inputStream = socket.getInputStream(); byte buffer [] = new byte[1024*4]; int temp = 0; //从InputStream当中读取客户端所发送的数据 while((temp = inputStream.read(buffer)) != -1){ System.out.println(new String(buffer,0,temp)); } } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } finally{ try { serverSocket.close(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } } } }
2.socket的UDP通信
客户端 :
import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.InetAddress; public class UDPClient { public static void main(String[] args) { try { //首先创建一个DatagramSocket对象 DatagramSocket socket = new DatagramSocket(4567); //创建一个InetAddree InetAddress serverAddress = InetAddress.getByName("192.168.1.104"); String str = "hello"; byte data [] = str.getBytes(); //创建一个DatagramPacket对象,并指定要讲这个数据包发送到网络当中的哪个地址,以及端口号 DatagramPacket packet = new DatagramPacket(data,data.length,serverAddress,4567); //调用socket对象的send方法,发送数据 socket.send(packet); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } }
服务器端:
import java.io.IOException; import java.io.InputStream; import java.net.DatagramPacket; import java.net.DatagramSocket; import java.net.ServerSocket; import java.net.Socket; import android.app.Activity; import android.os.Bundle; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; public class SocketActivity extends Activity { /** Called when the activity is first created. */ private Button startButton = null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); startButton = (Button)findViewById(R.id.startListener); startButton.setOnClickListener(new StartSocketListener()); } class StartSocketListener implements OnClickListener{ @Override public void onClick(View v) { new ServerThread().start(); } } class ServerThread extends Thread{ public void run(){ try { //创建一个DatagramSocket对象,并指定监听的端口号 DatagramSocket socket = new DatagramSocket(4567); byte data [] = new byte[1024]; //创建一个空的DatagramPacket对象 DatagramPacket packet = new DatagramPacket(data,data.length); //使用receive方法接收客户端所发送的数据 socket.receive(packet);//这也是个阻塞方法 String result = new String(packet.getData(),packet.getOffset(),packet.getLength()); System.out.println("result--->" + result); } catch (Exception e) { // TODO Auto-generated catch block e.printStackTrace(); } } } }