java服务器(对接的服务器 部分代码)

package com.hirain.pmtsd.tcp.server;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.HashMap;
import java.util.concurrent.ConcurrentHashMap;



public class TCP {
          
   
    //监听端口
    private static final int PORT = 1234;

    public static void main(String[] args) throws IOException {
          
   
        ServerSocket serverSocket = null;
        Socket socket = null;
        try {
          
   
            //建立服务器的Socket，并设定一个监听的端口PORT
            serverSocket = new ServerSocket(PORT);
          System.out.println("开始建立连接");
            while(true){
          
   
                 try {
          
   
                  
                    socket = serverSocket.accept();
                    System.out.println("连接成功");
                 } catch (Exception e) {
          
   
                     System.out.println("建立与客户端的连接出现异常");
                     e.printStackTrace();
                 }
                 ServerThread thread = new ServerThread(socket);
                 thread.start();
            }
        } catch (Exception e) {
          
   
            System.out.println("端口被占用");
            e.printStackTrace();
        }        
        finally {
          
   
            serverSocket.close();
        }
    }
}


class ServerThread extends Thread {
          
   
    private Socket socket ;
    InputStream inputStream;
    OutputStream outputStream;
    ConcurrentHashMap<String, HashMap<String, Object>> m = new ConcurrentHashMap<>();
    HashMap<String, Object> map =new HashMap<>();
    //public   Gson gson =new Gson();
    public  ServerThread(Socket socket){
          
   
        this.socket=socket;
    }
    public void run(){
          
   
        try {
          
   
            while (true){
          
   
                //接收客户端的消息并打印
                System.out.println(socket);
                inputStream=socket.getInputStream();
                socket.getInetAddress();
                byte[] by = new byte[1024];
                inputStream.read(by);
                String string1 = new String(by).trim();
                String string = new String(string1.getBytes("GBK"),"UTF-8");
                System.out.println(string);    
                //byte[] bytes = Run.map.toString().getBytes();
               
               
             /*   for(ConcurrentHashMap.Entry<String, HashMap<String,Object>> map2: Run.map.entrySet())
                {
                  if (string.equals("CAircraft")) {
                    map.put("fAltitude_AGL",  map2.getValue().get("fAltitude_AGL"));
                    map.put("dLatitude",  map2.getValue().get("dLatitude"));
                    map.put("dLongitude", map2.getValue().get("dLongitude"));
                    m.put("CAircraft", map);
                  }
                  TestClient testClient =new TestClient("",8080);
                  testClient.sendMessage(string);
                }
               String message = gson.toJson(m);*/
                  //向客户端发送消息
                String message = "{"红方":{"速度":"260"}}";
                //String message = "";
                outputStream = socket.getOutputStream();
                //Integer s = message.getBytes().length;
                //String num =  s.toString();
                //outputStream.write(string.getBytes());
                System.out.println(message.getBytes().length);
                outputStream.write(message.getBytes());
                
                System.out.println("OK");
                
            }
        } catch (Exception e) {
          
   
            System.out.println("客户端主动断开连接了");
            //e.printStackTrace();
        }
        //操作结束，关闭socket
        try{
          
   
            socket.close(); 
        }catch(IOException e){
          
   
            System.out.println("关闭连接出现异常");    
            e.printStackTrace();
        }
    }
}