How to solve socket mistake

[Zhang Jones]

package com.phei.action;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Scanner;

public class ClientCommunication {
	private String host;
	private int port;
	private InputStreamReader isr;
	private BufferedReader br;
	private PrintWriter out;
	
	public ClientCommunication(String host, int port) {
		this.host = host;
		this.port = port;
	}

	public void getConnection(){
		try {
			Socket socket = new Socket(host, port);
			InputStream is = socket.getInputStream();
			OutputStream os = socket.getOutputStream();
			out = new PrintWriter(os);
			System.out.println("Begin send data...");
			Scanner sc = new Scanner(System.in);
			String output = "";
			for (int i = 0; i < 1; i++) {
				output = sc.nextLine()+"\n";
			}
			out.println(output);
			
			System.out.println("Debug...");
			
			isr = new InputStreamReader(is, "UTF-8");
			br = new BufferedReader(isr);
			StringBuffer buffer = new StringBuffer();
			String line = "";
			while ((line = br.readLine()) != null) {
				buffer.append(line);
			}
			System.out.println("从服务器端接收的数据: "+buffer.toString());
			isr.close();
			br.close();
			out.close();
		} catch (UnknownHostException e) {
			e.printStackTrace();
			System.out.println("client...UKH"+e.getMessage());
		} catch (IOException e) {
			e.printStackTrace();
			System.out.println("client...IOE"+e.getMessage());
		}
	}
	
	public static void main(String[] args) {
		ClientCommunication communication = new ClientCommunication("127.0.0.1", 10000);
		communication.getConnection();
	}

}

package com.phei.action;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class ServerCommunicate {
	private int port;
	private BufferedReader br;
	private InputStreamReader isr;
	private PrintWriter out;
	
	public ServerCommunicate(int port) {
		this.port = port;
	}

	public void getConnection(){
		try {
				ServerSocket serverSocket = new ServerSocket(port);
				Socket socket = serverSocket.accept();
				InputStream is = socket.getInputStream();
				OutputStream os = socket.getOutputStream();
				isr = new InputStreamReader(is, "UTF-8");
				br = new BufferedReader(isr);
				out = new PrintWriter(os);
				StringBuffer buffer = new StringBuffer();
				String line = "";
				while ((line = br.readLine()) != null) {
					buffer.append(line);
				}
				System.out.println("Receive data from client: "+buffer.toString());
				out.println(buffer.toString());
				out.close();
				isr.close();
				br.close();
		} catch (IOException e) {
			e.printStackTrace();
			System.out.println("Server...IOE"+e.getMessage());
		}
	}
	
	public static void main(String[] args) {
		ServerCommunicate communicate = new ServerCommunicate(10000);
		communicate.getConnection();
	}

}

[fred rosenberger]

I suggest you start by reading this.