Socket 学习
这两个月要做一个Android远程控制PC的一个project，昨天才分析出思路，先做基本的，socket连接，到图书馆找socket编程的书，结果《Thinking in java》里面没见socket，不知道是我英文不好还是怎样，但当时就剩下一本英文版的。只能另外找了一本，我看讲得确实很不错。就照着写了一遍
1，建立服务器端，分为5步：
第一步：创建ServerSocket对象
ServerSocket server = new ServerSocket(port,queueLength)；
第二步：通过ServerSocket将服务器与端口绑定，监听客户机进行的连接
Socket connection = server.accept();
这条语句返回一个Socket对象
第三步：获得OutputStream和InputStream对象
ObjectInputStream input = new ObjectInptStream(connection.getInputStream()); ObjectOutputStream output = new ObjectOutputStream(connection.getOutputStream());
第四步：服务器和客户端通过InputStream和OutputStream对象通信
第五步：关闭连接
Server代码
package com.zph.control;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/**
* 2011-10-23 14:57
*
* */
public class Server extends JFrame{
/**
*
*/
private static final long serialVersionUID = -3956199261211237769L;
private JTextField enterField;
private JTextArea displayArea;
private ObjectOutputStream output;
private ObjectInputStream input;
private ServerSocket server;
private Socket connection;
private int counter = 1;
private int port = 5000;
public int getPort() {
return this.port;
}
public void setPort(int port) {
this.port = port;
}
public Server() {
super("server");
Container container = this.getContentPane();
enterField = new JTextField();
enterField.setEnabled(false);
this.enterField.addActionListener(new ActionListener(){
@Override
public void actionPerformed(ActionEvent e) {
sendData(e.getActionCommand());
enterField.setText("");
}
//end inner class
});
container.add(enterField, BorderLayout.NORTH);
displayArea = new JTextArea();
container.add(new JScrollPane(displayArea), BorderLayout.CENTER);
setSize(300,500);
setVisible(true);
}
protected void sendData(String message) {
try {
this.output.writeObject("SERVER >>> "+ message);
this.output.flush();
displayArea.append("\nSERVER>>>"+message);
} catch (IOException e) {
displayArea.append("\n ERROR>>>"+message);
}
}
public void runServer(){
try {
//step 1
server = new ServerSocket(port,10);
} catch (IOException e) {
displayArea.append("\nServer IO Exception "+e.toString());
}
while(true){
//step 2
waitForConnection();
//step 3
getStream();
//step 4
processConnection();
//step 5
closeConnection();
++counter;
}
}
private void waitForConnection() {
displayArea.setText("wait for connection\n");
try {
connection = server.accept();
displayArea.append("connection"+counter
+"recevied from:"
+connection.getInetAddress().getHostName());
} catch (IOException e) {
displayArea.append("\n"+e.toString());
}
}
private void getStream() {
try {
output = new ObjectOutputStream(connection.getOutputStream());
output.flush();
input =new ObjectInputStream( connection.getInputStream());
displayArea.append("\nGot I/O streams\n");
} catch (IOException e) {
displayArea.append("\n"+e.toString());
}
}
private void processConnection() {
String message = "SERVER>>> Connection successful";
try {
output.writeObject(message);
output.flush();
} catch (IOException e) {
displayArea.append("\n"+e.toString());
}
enterField.setEnabled(true);
do{
try {
message = (String) input.readObject();
displayArea.append("\n"+message);
displayArea.setCaretPosition(displayArea.getText().length());
} catch (IOException e) {
displayArea.append("\nIOException"+e.toString());
} catch (ClassNotFoundException e) {
displayArea.append("\nClassNotFound Exception");
}
}while(!message.trim().equalsIgnoreCase("CLIENT>>>TERMINATE"));
}
private void closeConnection() {
displayArea.append("\nUser terminated connection");
enterField.setEnabled(false);
try {
output.close();
input.close();
connection.close();
} catch (IOException e) {
displayArea.append("\n"+e.toString());
}
}
public static void main(String[] args) {
Server PCServer = new Server();
PCServer.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
PCServer.runServer();
}
}
2，建立客户端，分为四步：
第一步：创建一个Socket对象用来连接到服务器上
Socket connection = new Socket(serverAddress , port);
第二步：用Socket的getInputStream方法和getOutputStream方法分别用于获得与Socket 相关联的InputStream和OutputStream的引用，
第三步：客户端与服务端通过InputStream和OutputStream 对象通信的处理
第四步：关闭连接
Client代码：
package com.zph.control;
import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.net.InetAddress;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.JTextField;
/**
* 2011-10-23 15:53
*
* */
public class Client extends JFrame {
/**
*
*/
private static final long serialVersionUID = 3221172809627731102L;
private JTextField enterField;
private JTextArea displayArea;
private ObjectOutputStream output;
private ObjectInputStream input;
private String message = "";
private String chatServer;
private Socket client;
private int port = 5000;
public int getPort() {
return port;
}
public void setPort(int port) {
this.port = port;
}
public Client(String host) {
super("client");
chatServer = host;
Container container = this.getContentPane();
enterField = new JTextField();
enterField.setVisible(true);
enterField.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
sendData(e.getActionCommand());
enterField.setText("");
}
// end inner class
});// end addActionListener
container.add(enterField, BorderLayout.NORTH);
displayArea = new JTextArea();
container.add(new JScrollPane(displayArea), BorderLayout.CENTER);
this.setSize(300, 500);
this.setVisible(true);
}
protected void sendData(String message) {
try {
output.writeObject("CLIENT>>>" + message);
output.flush();
displayArea.append("\nCLIENT>>>" + message);
} catch (IOException e) {
displayArea.append("\nERROR wirte Object");
}
}
public void runClient() {
// step 1 ,create a socket to make connection
connectToServer();
//step 2 , get inputStream and outputStream
getStreams();
// step 3 ,process connection
proccessConnection();
// step 4 ,close connections
closeConnection();
}
private void connectToServer() {
try {
displayArea.setText("Attempting connection\n");
client = new Socket(InetAddress.getByName(chatServer), port);
displayArea.append("connection to "
+ client.getInetAddress().getHostName());
} catch (UnknownHostException e) {
displayArea.append("\nERROR unKnownHost");
} catch (IOException e) {
displayArea.append("\n" + e.toString());
}
}
private void getStreams() {
try {
output = new ObjectOutputStream(client.getOutputStream());
output.flush();
input = new ObjectInputStream(client.getInputStream());
} catch (IOException e) {
displayArea.append("\n"+e.toString());
}
}
private void proccessConnection() {
enterField.setEnabled(true);
do{
try {
message = (String) input.readObject();
displayArea.append("\n"+message);
displayArea.setCaretPosition(
displayArea.getText().length());
} catch (IOException e) {
displayArea.append("\n"+e.toString());
} catch (ClassNotFoundException e) {
displayArea.append("\n class not found");
}
}while(!message.trim().equalsIgnoreCase("SERVER>>>TERMINATE"));
}
private void closeConnection() {
displayArea.append("\nClosing connection");
try {
output.close();
input.close();
client.close();
} catch (IOException e) {
displayArea.append("\n"+e.toString());
}
}
public static void main(String[] args) {
Client PCClient = new Client("127.0.0.1");
PCClient.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
PCClient.runClient();
}
}
回到需求，android作为控制端，PC作为受控端，连接的时候（我个人觉得）如果是在局域网，只要设置一下IP和端口，一样可以用这个办法连，如果是连上了Internet，我真不知道会不会成功，感觉设置好了IP和端口也行。
昨天下载了一个网灵一号，做的真好，画面居然还能那么清晰。
android部分的代码本来我要写出来了，可是5点钟的时候让我真的受不了了，我又要发一下牢骚，这世道这么会有这么多邪恶的人，大白天的对人家女生那么无理，人家是去学车的，你作为教练也算是老师，有句话怎么说的：……
女生学车千万别一个人去！