Android-基于P2P的局域网即时通信系统

建立一个局域网内的简单的P2P消息系统，程序既是服务器又是客户，服务器端口（自拟服务器端口号并选定）。

package yyj.main;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.util.StringTokenizer;
import java.util.concurrent.ConcurrentHashMap;
import javax.swing.JOptionPane;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;

import yyj.model.User;
import yyj.view.*;

public class ClientMain extends ClientView{
	
	//model
	private User me; 
	// 所有在线用户
    private ConcurrentHashMap onlineUsers = new ConcurrentHashMap（）;  
    private String sendTarget = “ALL“;  //默认发送对象
  
    //Socket  
    private Socket socket;  
    private PrintWriter writer;    //输出流
    private BufferedReader reader; //输入流 
  
    // 负责接收消息的线程  
    private MessageThread messageThread;  
  
    //Status  
    private boolean isConnected;   //判断是否连接到服务端
    
    //构造函数
    public ClientMain（） {
    	
    // 写消息的文本框中按回车键时事件
    messageTextField.addActionListener（new ActionListener（） {  
        public void actionPerformed（ActionEvent e） {  
            send（）;  
        }  
    }）;
    
    // 单击发送按钮时事件
    sendButton.addActionListener（new ActionListener（） {  
        public void actionPerformed（ActionEvent e） {  
            send（）;  
        }  
    }）;  

    // 单击连接按钮时事件
    connectButton.addActionListener（new ActionListener（） {  
        public void actionPerformed（ActionEvent e） {  
            if （!isConnected） {  
                connect（）;  
            }  
        }  
    }）;  

    // 单击断开按钮时事件
    disconnectButton.addActionListener（new ActionListener（） {  
        public void actionPerformed（ActionEvent e） {  
            if （isConnected） {  
                disconnect（）;  
            }  
        }  
    }）;  

    // 关闭窗口时事件
    frame.addWindowListener（new WindowAdapter（） {  
        public void windowClosing（WindowEvent e） {  
            if （isConnected） {  
                disconnect（）;  
            }  
            System.exit（0）;  
        }  
    }）;  

    // 为在线用户添加点击事件
    userList.addListSelectionListener（new ListSelectionListener（） { 
    	
        public void valueChanged（ListSelectionEvent e） {  
            int index = userList.getSelectedIndex（）;  //获取被点击的用户的序号
            if （index < 0） return;  
 
            if （index == 0） {  //默认为所有人
                sendTarget = “ALL“;  
                messageToLabel.setText（“To: 所有人“）;  
            } else {  
                String name = （String）listModel.getElementAt（index）;  //获取被点击用户的名字
                if （onlineUsers.containsKey（name）） {  
                    sendTarget = onlineUsers.get（name）.description（）;  
                    messageToLabel.setText（“To: “ + name）;  //将To..标签改为To 用户名
                } else {  
                    sendTarget = “ALL“;  
                    messageToLabel.setText（“To: 所有人“）;  
      

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2017-07-10 09:32  P2P_chater-master\
     目录           0  2017-07-10 09:32  P2P_chater-master\P2P_Chater\
     文件         295  2017-07-10 09:32  P2P_chater-master\P2P_Chater\.classpath
     文件         369  2017-07-10 09:32  P2P_chater-master\P2P_Chater\.project
     目录           0  2017-07-10 09:32  P2P_chater-master\P2P_Chater\.settings\
     文件         587  2017-07-10 09:32  P2P_chater-master\P2P_Chater\.settings\org.eclipse.jdt.core.prefs
     目录           0  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\
     目录           0  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\
     目录           0  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\
     文件         671  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ClientMain$1.class
     文件         671  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ClientMain$2.class
     文件         759  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ClientMain$3.class
     文件         758  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ClientMain$4.class
     文件         785  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ClientMain$5.class
     文件        1939  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ClientMain$6.class
     文件        4123  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ClientMain$MessageThread.class
     文件        7209  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ClientMain.class
     文件         671  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ServerMain$1.class
     文件         671  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ServerMain$2.class
     文件         758  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ServerMain$3.class
     文件         758  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ServerMain$4.class
     文件         785  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ServerMain$5.class
     文件        5248  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ServerMain$ClientServiceThread.class
     文件        2896  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ServerMain$ServerThread.class
     文件        6313  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\main\ServerMain.class
     目录           0  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\model\
     文件        1148  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\model\User.class
     目录           0  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\view\
     文件        3738  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\view\ClientView.class
     文件        3431  2017-07-10 09:32  P2P_chater-master\P2P_Chater\bin\yyj\view\ServerView.class
     目录           0  2017-07-10 09:32  P2P_chater-master\P2P_Chater\src\
............此处省略15个文件信息