java socket client to python server with utf-8

import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.net.ConnectException;
import java.net.Socket;
import java.net.UnknownHostException;

public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws UnknownHostException,IOException,ConnectException {
		Socket aClient = null;
		aClient = new Socket("localhost",7359);
		
		try {
			DataInputStream input = new DataInputStream(aClient.getInputStream());
			DataOutputStream out = new DataOutputStream(aClient.getOutputStream());
			out.writeUTF("哈哈phone#654321");
			out.flush();
			StringBuffer buffArray = new StringBuffer();
			
			byte[] buff = new byte[1024];
			  
			input.read(buff);
			  
			buffArray.append(buff);
			String ret = new String(buff,"UTF-8");
			
			System.out.print("return======="+ret.trim()+"\n");
			
			out.close();
		} catch (Exception e) {
			System.out.println(e.getMessage());
		} finally {
			aClient.close();
		}
	}

}