Server and Client 间的通话

编写Server和Client间的通话，首先Server要启动ServerSocket，Client端要启动Socket，然后Server端要不断的accept（）；然后他们间的通话用流的形式传递，用DataInputStream or DataOutputStream，中的readUTF()和writeUTF（）方法.最后还要关闭流，关闭Socket.还不要忘了还要处理异常。代码如下：

import java.net.*;
import java.io.*;

public class TcpClient {
	public static void main(String[] args) {
		try {
			Socket ss = new Socket("127.0.0.1", 6666);
			DataInputStream di = new DataInputStream(ss.getInputStream());
			DataOutputStream dz = new DataOutputStream(ss.getOutputStream());
			dz.writeUTF("我爱你");
			dz.flush();
			System.out.println(di.readUTF());
			di.close();
			dz.close();
			ss.close();
		} catch (IOException e) {
			System.exit(0);
		}

	}
}
import java.net.*;
import java.io.*;

public class TcpServer {
	public static void main(String[] args) {
		try {
			ServerSocket ss = new ServerSocket(6666);
			while (true) {
				Socket s = ss.accept();
		System.out.println("已经连上了");
				DataOutputStream ds = new DataOutputStream(s.getOutputStream());
				DataInputStream di = new DataInputStream(s.getInputStream());
				String z="";z=di.readUTF();
				if (z!= null) {
					System.out.println(z);
					System.out.println("我收到了");
				}
				ds.writeUTF("你好吗");
				ds.flush();
				ds.close();
				di.close();
				s.close();
			}
		} catch (IOException e) {
			System.exit(-1);
		}
	}
}