clientdemo.java

java入门经典教程 java入门经典教程 java入门经典教程

  // 例 8.4.4 ClientDemo.java
	import java.io.*;
	import java.net.*; 
	class ClientDemo
	{
public static void main (String [] args)
{
String host = "localhost";
//也可以通过命令行参数来获取服务器的地址
if (args.length == 1) host=args[0];

BufferedReader br = null;
PrintWriter pw = null;
Socket s = null;

System.out.println("Connecting to Server...");
try
{
		s = new Socket (host, 10000);
		System.out.println("Connection success");
		System.out.println("you can send: DATE(date) or TIME(time) or BYE(bye)");	
		InputStreamReader isr;
		isr = new InputStreamReader (s.getInputStream());
		br = new BufferedReader (isr);
		pw = new PrintWriter (s.getOutputStream(), true);
		
		BufferedReader bu = new BufferedReader(
			new InputStreamReader(System.in));

		String str;
		do
		{
		str = bu.readLine().toUpperCase();
		pw.println(str);
		if (str.startsWith("TIME")||str.startsWith("DATE"))
		{
			System.out.println(br.readLine());
			}
		}while(!str.equals("BYE"));
		}catch (IOException e){
		System.out.println("Connection failed");
		System.out.println (e.toString ());
	}finally{
		try
		{
			if (br != null)  br.close ();
			if (pw != null)  pw.close ();
			if (s != null)  s.close ();
		}catch (IOException e){ e.printStackTrace();}
	}
}
}