Javase Project--------Chat Room

Javase Chat Room

Client:
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import Java.net.Socket;
Import java.net.SocketException;
Import Java.util.Scanner;

Import Clinet.untils.InputUtil;
Import Configs.configs;

public class Clientdemo {
private static outputstream out;
private static InputStream in;
public static Scanner SC;

public static void Main (string[] args) {try {socket s = new socket ("127.0.0.1", 1008);        out = S.getoutputstream ();        in = S.getinputstream ();        sc = new Scanner (system.in);            while (true) {System.out.println ("Please enter the user name you want to register:");            String username = Sc.nextline ();            Out.write (Username.getbytes ());            byte[] bys = new byte[1024];            int len = In.read (bys);            String msg = new String (bys, 0, Len);                if (msg.equals ("yes")) {System.out.println (username + "Login succeeded");            Break            } else {System.out.println ("the user already exists, please re-enter the user name");        }} clientthread ct = new Clientthread (in);        Ct.start ();        Boolean flag =true;            while (flag) {System.out.println ("Please select type: 1 private chat, 2 public chat, 3 online people, 4 downline");            Message type Message object: Message content: message type int num = Inpututil.inputinttype (new Scanner (system.in));       Switch (num) {     Case 1://Private chat privatetalk ();            Break                Case 2://Public chat publictalk ();            Break                Case 3://Online System.out.println ("Current online numbers ....");                Showtalker ();            Break                Case 4://Downline downLine ();                Flag=false;                Ct.flag=false;            Break    }} s.close ();    } catch (SocketException e) {} catch (IOException e) {e.printstacktrace (); }finally {}}private static void DownLine () {try {String msg = "null" + ":" + "null" + ":" + configs.msg_ex        IT;    Out.write (Msg.getbytes ());    } catch (IOException e) {e.printstacktrace (); }}private static void Showtalker () throws IOException {while (true) {String msg = "null" + ":" + "null" + ":            "+configs.msg_onlist; Out.write (Msg.getbytes ());           Break    }}private static void Publictalk () {System.out.println ("Currently in public chat mode ...");            try {while (true) {String msg = Sc.nextline ();            if (Msg.equals ("-Q")) {break;            } msg = "null" + ":" + msg + ":" + configs.msg_public;        Out.write (Msg.getbytes ());    }} catch (IOException e) {e.printstacktrace ();        }}private static void Privatetalk () {try {System.out.println ("Currently in private chat mode ...");            while (true) {String msg = Sc.nextline ();            if ("-Q". Equals (msg)) {break;            } msg = msg + ":" + configs.msg_private;        Out.write (Msg.getbytes ());    }} catch (IOException e) {e.printstacktrace (); }}

}
The thread that the client reads the message from:
Import java.io.IOException;
Import Java.io.InputStream;
Import java.net.SocketException;

Import Clinet.untils.TimeUtil;
Import Configs.configs;

public class Clientthread extends Thread {
Private InputStream in;
Boolean flag=true;
Public Clientthread (InputStream in) {br/>this.in=in;
}
@Override

try {
while (flag) {
Byte[] Bys=new byte[1024];
int Len=in.read (bys);
String Client=new string (bys, 0, Len);
String[] Split=client.split (":");
String Sender=split[0];
String Msg=split[1];
int Msgtype=integer.parseint (split[2]);
Long Time=long.parselong (split[3]);
int num=1;
String data=timeutil.changemils2date (Time, "Yyyy-mm-dd HH:mm:ss");

            if(msgType==Configs.MSG_PRIVATE) {                //私聊                System.out.println(data);                System.out.println(sender+"对你说："+msg);            }else if(msgType==Configs.MSG_PUBLIC) {                //公聊                System.out.println(data);                System.out.println(sender+"对大家说:"+msg);            }else if(msgType==Configs.MSG_ONLINE) {                System.out.println(sender+msg+data);            }else if(msgType==Configs.MSG_ONLIST) {                System.out.println(msg);            }else if(msgType==Configs.MSG_EXIT) {                System.out.println(sender+msg);            }        }    } catch (SocketException e) {    } catch (IOException e) {        // TODO Auto-generated catch block        e.printStackTrace();    }}

}
Tools
Message type mode:
public class Configs {

//私聊//ctrl+shift+x :小转大//ctrl+shift+y:大转小public static final int MSG_PRIVATE = 100 ; //公聊public static final int MSG_PUBLIC = 200 ;//上线提醒public static final int MSG_ONLINE = 300 ;//在线列表public static final int MSG_ONLIST =400 ;//退出public static final int MSG_EXIT = 500 ;//文件public static final int MSG_FILE = 600 ;

}
The client input information is an integer tool:
Import Java.util.Scanner;

public class Inpututil {

public static int inputIntType(Scanner sc) {    int choose = 0;    while (true) {        try {            //录入用户输入的整数            choose = sc.nextInt();            break;        } catch (Exception e) {            sc = new Scanner(System.in);            System.out.println("输入的类型不正确，请重新输入:");        }    }    return choose;}

}
Converts the number of milliseconds to the date format tool class:
Import java.text.ParseException;
Import Java.text.SimpleDateFormat;
Import Java.util.Date;

Public class Timeutil {
//2016-10-27 19:20:12 yyyy-mm-dd HH:mm:ss
public static string Changedate2week (string Datestr,string formatstr) {
SimpleDateFormat sdf = new SimpleDateFormat (FORMATSTR);
Date date = null;
try {
date = Sdf.parse (DATESTR);
} catch (ParseException e) {
E.printstacktrace ();
}
SimpleDateFormat sdf1 = new SimpleDateFormat ("E");
return Sdf1.format (date);
}

Convert the date of the string to a number of milliseconds public static long Changedate2mils (String datestr,string formatstr) {SimpleDateFormat SDF = new Simpledat    Eformat (FORMATSTR);    Date date = null;    try {date = Sdf.parse (DATESTR);    } catch (ParseException e) {e.printstacktrace (); } return Date.gettime ();} Convert the number of milliseconds to the specified format public static String changemils2date (Long mils,string formatstr) {SimpleDateFormat SDF = new SimpleDate    Format (FORMATSTR);    Date date = new Date (mils); return Sdf.format (date);} public static string Changedate2customermsg (String datestr) {Long mils = Changedate2mils (Datestr, "Yyyy-mm-dd_hh:mm:ss"    );    Long nowmils = System.currenttimemillis ();    Long offsetmils = nowmils-mils;    String msg = "";    if (offsetmils<1000*60*2) {msg = "just";    }else if (offsetmils<1000*60*60) {msg = (offsetmils/(1000*60)) + "Minutes ago";    }else if (offsetmils<1000*60*60*24) {msg = (offsetmils/(1000*60*60)) + "Hour Ago"; }else if (offsetmils<1000*60*60*24*2) {msg= "Yesterday";        }else{String nowyear = changemils2date (nowmils, "yyyy");        String year = changemils2date (mils, "yyyy");        if (Nowyear.equals (year)) {msg = Changemils2date (mils, "MM month DD day");        }else{msg = changemils2date (mils, "yyyy year mm DD day"); }} return msg;

}
Service-Side---------------------------------------------------------------------------------------------------------------------- ----------------------------------
Service port 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 Usercheck.serverusercheck;

public class Serverdemo {

public static void main(String[] args) throws IOException   {    HashMap<String, Socket> hm = new HashMap<String,Socket>();    ServerSocket ss=new ServerSocket(1008);    System.out.println("服务器已开启,正在等待客户端的连接...");    int i=1;    while(true) {        Socket s=ss.accept();        System.out.println("第"+(i++)+"个客户端已连接...");        InputStream in=s.getInputStream();        OutputStream out=s.getOutputStream();;        ServerUserCheck su=new ServerUserCheck(s,hm);        su.start();    }}

}
The thread on the server that holds the user name:
Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import Java.net.Socket;
Import Java.util.HashMap;
Import Java.util.Set;

Import Configs.configs;
Import Server.serverthread;

public class Serverusercheck extends Thread {
Private Socket S;
Private hashmap<string, socket> HM;
Private String username;

Public Serverusercheck (Socket s, hashmap<string, socket> hm) {this.hm = HM; THIS.S = s;}        @Overridepublic void Run () {try {InputStream in = S.getinputstream ();        OutputStream out = S.getoutputstream ();            while (true) {byte[] bys = new byte[1024];            int len = In.read (bys);            Username = new String (bys, 0, Len);                if (!hm.containskey (username)) {hm.put (username, s);                Out.write ("Yes". GetBytes ());            Break            } else {out.write ("no". GetBytes ());        }} set<string> KeySet = Hm.keyset ();            for (String key:keyset) {if (Key.equals (username)) {break;            } String Online = Username + ":" + "online ..." + ":" + Configs.msg_online + ":" + system.currenttimemillis ();            Socket s = hm.get (key);            OutputStream OU = S.getoutputstream (); Ou.write (Online.getbytes ());    } New Serverthread (HM, S, username). Start ();    } catch (IOException e) {//TODO auto-generated catch block E.printstacktrace (); }}

}
The thread on which the server forwards information:

Import java.io.IOException;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import Java.net.Socket;
Import Java.util.HashMap;
Import Java.util.Set;

Import Configs.configs;

public class Serverthread extends Thread {

Private hashmap<string, socket> hm;private Socket s;private String username;public serverthread (hashmap<    String, socket> hm, Socket S, String username) {this.hm = HM;    THIS.S = s; This.username = Username;}        @Overridepublic void Run () {try {InputStream in = S.getinputstream ();        OutputStream out = S.getoutputstream ();            while (true) {byte[] bys = new byte[1024];            int len = In.read (bys);            String client = new String (bys, 0, Len);            string[] msgs = Client.split (":");            Receiver String receiver = msgs[0];            Message content String msgcontent = msgs[1];            Message type int msgtype = Integer.parseint (msgs[2]);            After splitting the message, reassemble the message, and contract the server forwarding format//sender: Message content: Message type: Long time = System.currenttimemillis ();                if (Msgtype = = configs.msg_private) {Socket s = hm.get (receiver); String zfmsg = Username + ":" +msgconTent + ":" + Msgtype + ":" + time;            S.getoutputstream (). Write (Zfmsg.getbytes ());                } else if (Msgtype = = configs.msg_public) {set<string> KeySet = Hm.keyset ();                    for (String key:keyset) {if (Username.equals (key)) {continue;                    } Socket s = hm.get (key);                    String zfmsg = Username + ":" + msgcontent + ":" + Msgtype + ":" + time;                S.getoutputstream (). Write (Zfmsg.getbytes ());                }} else if (Msgtype = = configs.msg_onlist) {set<string> KeySet = Hm.keyset ();                StringBuffer sb = new StringBuffer ();                int i = 1;                    for (String key:keyset) {if (Key.equals (username)) {continue;                } sb.append (i++). Append (","). Append (Key). Append ("\ n");              }  String zfmsg = Username + ":" + sb.tostring () + ":" + configs.msg_onlist + ":" + time;                Socket s = hm.get (username);            S.getoutputstream (). Write (Zfmsg.getbytes ());                }else if (msgtype==configs.msg_exit) {set<string> KeySet = Hm.keyset ();                    for (String key:keyset) {if (Key.equals (username)) {continue;                    } Socket OU = Hm.get (key);                    String zfmsg=username+ ":" + "Offline" + ":" +configs.msg_exit+ ":" +time;                Ou.getoutputstream (). Write (Zfmsg.getbytes ());            } break;        }} hm.get (username). Close ();    Hm.remove (username); } catch (NumberFormatException e) {} catch (IOException e) {//TODO auto-generated catch block e.prints    Tacktrace (); }}

}

Javase Project--------Chat Room