java实现客户端与服务端之间的通信
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import .*;
import java.io.*;
import java.util.Calendar;
import java.awt.*;
import java.awt.event.*;
class EchoClient extends Frame implements ActionListener,Runnable{ Thread t;
static Calendar T;
static int H;
static int M;
static int S;
static String l;
private Button b1 = new Button("发送");
private Button b2 = new Button("关闭");
private TextField t1 = new TextField(30);
private TextArea t2 = new TextArea();
private int m;
private String n;
Socket connection;
DataInputStream in;
DataOutputStream out;
private class window extends WindowAdapter{
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
private void focusEvt(java.awt.event.WindowEvent evt) {
t1.requestFocus();
}
public void clock(){
T=Calendar.getInstance();
H=T.get(Calendar.HOUR_OF_DAY);
M=T.get(Calendar.MINUTE);
S=T.get(Calendar.SECOND);
l=String.valueOf(H)+":"+String.valueOf(M)+":"+String.valueOf(S); }
public EchoClient(String i,int j){
super("客户端");
t = new Thread(this);
m=j;
n=i;
t.start();
}
public void run(){
Panel p1 = new Panel();
p1.setLayout(new FlowLayout());
p1.add(b2);p1.add(t1);p1.add(b1);
setLayout(new BorderLayout());
add("South",p1);add("Center",t2);
b1.addActionListener(this);
b2.addActionListener(this);
t1.addActionListener(this);
addWindowListener(new window());
addWindowListener(new java.awt.event.WindowAdapter() {
public void windowOpened(java.awt.event.WindowEvent evt) {
focusEvt(evt);
}
});
setSize(400,300);
setVisible(true);
try{
connection = new Socket(n,m);
in = new DataInputStream(connection.getInputStream());
out = new DataOutputStream(connection.getOutputStream());
String link = new String("");
while(!link.toUpperCase().equals(".QUIT")){
link = in.readUTF();
clock();
t2.append("服务端"+l+"\n"+link+"\n\n");} }catch(UnknownHostException uhe){
System.err.println("Unknown Host:127.0.0.1");
}
catch(IOException ioe){
System.err.println("IOException:"+ioe);
}
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==b1||e.getSource()==t1){
String line = t1.getText();
clock();
t2.append("客户端"+l+"\n"+line+"\n\n");
t1.setText("");
try{
out.writeUTF(line);
}catch(IOException ioe){
System.err.println("IOException:"+ioe);
}
}
else if(e.getSource()==b2){
System.exit(0);
}
}
public static String readString(){
String string = new String();
BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
try{
string = in.readLine();
}
catch(IOException e){
System.out.println("Console.readString:Unknown error...");
System.exit(-1);
}
return string;
}
}
class stat extends Frame implements ActionListener{
private Label l1 = new Label("请输入IP地址：");
private Label l2 = new Label("端口号：");
private TextField q1 = new TextField(10);
private TextField q2 = new TextField(10);
private Button r1 = new Button("确定");
private Button r2 = new Button("关闭");
private int j;
private String i,k;
private class window extends WindowAdapter{
public void windowClosing(WindowEvent e){
System.exit(0);
}
}
private void focusEvt(java.awt.event.WindowEvent evt) {
q1.requestFocus();
}