socket 的TCP和UDP通信

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OutputStreamOutputStream 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 blocke.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{@Overridepublic 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 blocke.printStackTrace();}finally{try {serverSocket.close();} catch (IOException e) {// TODO Auto-generated catch blocke.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InetAddreeInetAddress 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 blocke.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{@Overridepublic 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 blocke.printStackTrace();}    }    }}

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