Java執行個體開發05-01 簡單的多線程伺服器

知識點：1.Socket編程：ServerSocket類   Socket類2.Java多線程：編程原則（能夠獨立在一個線程中完成的操作就應該開闢一個新的線程）3.telnet命令 [注]win7是有telnet功能的，只是預設沒有開啟，開啟方法：開啟“控制台”，找到程式和功能，然後點擊左上方的“開啟或關閉windows功能”，會彈出windows功能的對話方塊，這個對話方塊裡面有許多windows的小功能，再找到TelentClient，打上勾，確認即可. 原始碼：/**
* @Author：胡家威  
* @CreateTime：2011-9-20 下午08:30:28
* @Description：
*/

package com.yinger.chap51;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.Date;

public class ReceiveServer {

  final int PORT=9090;

  public static void main(String[] args) {
    new ReceiveServer();
  }

  public ReceiveServer(){
    ServerSocket serverSocket = null;
    Socket socket = null;
    ServerThread serverThread = null;
    try {
      serverSocket = new ServerSocket(PORT);
      System.out.println("Server is start!\t"+new Date());
      System.out.println("port:"+serverSocket.getLocalPort());
      System.out.println("timeout:"+serverSocket.getSoTimeout());
      while(true){
        socket = serverSocket.accept();
        serverThread = new ServerThread(socket);
        serverThread.start();
      }
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

}

class ServerThread extends Thread{
  Socket socket;
  BufferedReader br;
  PrintWriter pw;

  public ServerThread(Socket socket) {
    this.socket = socket;
    try {
      // 對socket的輸入輸出資料流進行封裝
      br = new BufferedReader(new InputStreamReader(socket.getInputStream()));
      pw = new PrintWriter(new OutputStreamWriter(socket.getOutputStream()),true);//true
      pw.println("Welcom to server!\t"+new Date());
      pw.println("LocalPort:"+socket.getLocalPort());
      pw.println("Port:"+socket.getPort());
      pw.println("what can I do for you?");
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

  @Override
  public void run() {
    String command;
    while(true){
      try {
        command= br.readLine();
        if(command==null || command.trim().equalsIgnoreCase("exit")){
          break;
        }else if(command.trim().equalsIgnoreCase("help")){
          pw.println("HELP\tQUERY\tEXIT");
        }else if(command.trim().equalsIgnoreCase("query")){
          pw.println("I don't know!");
        }else{
          pw.println("command is not found!Please see HELP!");
        }
      } catch (IOException e) {
        e.printStackTrace();
      }
    }
    try {
      socket.close();//關閉串連！
    } catch (IOException e) {
      e.printStackTrace();
    }
  }

}  

效果展示：

伺服器啟動：

建立串連：

測試：

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