本文实例为大家分享了java socket实现多人群聊与私聊的具体代码,供大家参考,具体内容如下
关于socket套接字的一些基本知识与认识可以参见上一篇或自行查阅。
serversocket和socket实现群聊与私聊涉及到多线程编程,实现过程的重点是利用socket通信的原理,即不断的在服务端和客户端创建输入输出流来相互传递、交换数据等以达到通信的目的。具体实现如下:
服务端:
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import java.io.*; import java.net.*; import java.util.hashmap; import java.util.map; import java.util.concurrent.executorservice; import java.util.concurrent.executors; import java.util.concurrent.threadpoolexecutor; public class tcpserver { private serversocket serversocket; /** * 创建线程池来管理客户端的连接线程 * 避免系统资源过度浪费 */ private executorservice exec; // 存放客户端之间私聊的信息 private map<string,printwriter> storeinfo; public tcpserver() { try { serversocket = new serversocket( 6789 ); storeinfo = new hashmap<string, printwriter>(); exec = executors.newcachedthreadpool(); } catch (exception e) { e.printstacktrace(); } } // 将客户端的信息以map形式存入集合中 private void putin(string key,printwriter value) { synchronized ( this ) { storeinfo.put(key, value); } } // 将给定的输出流从共享集合中删除 private synchronized void remove(string key) { storeinfo.remove(key); system.out.println( "当前在线人数为:" + storeinfo.size()); } // 将给定的消息转发给所有客户端 private synchronized void sendtoall(string message) { for (printwriter out: storeinfo.values()) { out.println(message); } } // 将给定的消息转发给私聊的客户端 private synchronized void sendtosomeone(string name,string message) { printwriter pw = storeinfo.get(name); //将对应客户端的聊天信息取出作为私聊内容发送出去 if (pw != null ) pw.println(message); } public void start() { try { while ( true ) { system.out.println( "等待客户端连接... ... " ); socket socket = serversocket.accept(); // 获取客户端的ip地址 inetaddress address = socket.getinetaddress(); system.out.println( "客户端:“" + address.gethostaddress() + "”连接成功! " ); /** * 启动一个线程,由线程来处理客户端的请求,这样可以再次监听 * 下一个客户端的连接 */ exec.execute( new listenrclient(socket)); //通过线程池来分配线程 } } catch (exception e) { e.printstacktrace(); } } /** * 该线程体用来处理给定的某一个客户端的消息,循环接收客户端发送 * 的每一个字符串,并输出到控制台 */ class listenrclient implements runnable { private socket socket; private string name; public listenrclient(socket socket) { this .socket = socket; } // 创建内部类来获取昵称 private string getname() throws exception { try { //服务端的输入流读取客户端发送来的昵称输出流 bufferedreader breader = new bufferedreader( new inputstreamreader(socket.getinputstream(), "utf-8" )); //服务端将昵称验证结果通过自身的输出流发送给客户端 printwriter ipw = new printwriter( new outputstreamwriter(socket.getoutputstream(), "utf-8" ), true ); //读取客户端发来的昵称 while ( true ) { string namestring = breader.readline(); if ((namestring.trim().length() == 0 ) || storeinfo.containskey(namestring)) { ipw.println( "fail" ); } else { ipw.println( "ok" ); return namestring; } } } catch (exception e) { throw e; } } @override public void run() { try { /* * 通过客户端的socket获取客户端的输出流 * 用来将消息发送给客户端 */ printwriter pw = new printwriter( new outputstreamwriter(socket.getoutputstream(), "utf-8"), true); /* * 将客户昵称和其所说的内容存入共享集合hashmap中 */ name = getname(); putin(name, pw); thread.sleep(100); // 服务端通知所有客户端,某用户上线 sendtoall("[系统通知] “" + name + "”已上线"); /* * 通过客户端的socket获取输入流 * 读取客户端发送来的信息 */ bufferedreader breader = new bufferedreader( new inputstreamreader(socket.getinputstream(), "utf-8" )); string msgstring = null ; while ((msgstring = breader.readline()) != null ) { // 检验是否为私聊(格式:@昵称:内容) if (msgstring.startswith( "@" )) { int index = msgstring.indexof( ":" ); if (index >= 0 ) { //获取昵称 string thename = msgstring.substring( 1 , index); string info = msgstring.substring(index+ 1 , msgstring.length()); info = name + ":" + info; //将私聊信息发送出去 sendtosomeone(thename, info); continue ; } } // 遍历所有输出流,将该客户端发送的信息转发给所有客户端 system.out.println(name+ ":" + msgstring); sendtoall(name+ ":" + msgstring); } } catch (exception e) { // e.printstacktrace(); } finally { remove(name); // 通知所有客户端,某某客户已经下线 sendtoall( "[系统通知] " +name + "已经下线了。" ); if (socket!= null ) { try { socket.close(); } catch (ioexception e) { e.printstacktrace(); } } } } } public static void main(string[] args) { tcpserver server = new tcpserver(); server.start(); } } |
客户端:
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import java.io.*; import java.net.*; import java.util.scanner; import java.util.concurrent.executorservice; import java.util.concurrent.executors; import java.util.concurrent.threadpoolexecutor; public class tcpclient { static private socket clientsocket; public tcpclient() {} public static void main(string[] args) throws exception { scanner scanner = new scanner(system.in); string serverip; system.out.println( "请设置服务器ip:" ); serverip = scanner.next(); clientsocket = new socket(serverip, 6789 ); tcpclient client = new tcpclient(); client.start(); } public void start() { try { scanner scanner = new scanner(system.in); setname(scanner); // 接收服务器端发送过来的信息的线程启动 executorservice exec = executors.newcachedthreadpool(); exec.execute( new listenrservser()); // 建立输出流,给服务端发信息 printwriter pw = new printwriter( new outputstreamwriter(clientsocket.getoutputstream(), "utf-8" ), true ); while ( true ) { pw.println(scanner.nextline()); } } catch (exception e) { e.printstacktrace(); } finally { if (clientsocket != null ) { try { clientsocket.close(); } catch (ioexception e) { e.printstacktrace(); } } } } private void setname(scanner scan) throws exception { string name; //创建输出流 printwriter pw = new printwriter( new outputstreamwriter(clientsocket.getoutputstream(), "utf-8" ), true ); //创建输入流 bufferedreader br = new bufferedreader( new inputstreamreader(clientsocket.getinputstream(), "utf-8" )); while ( true ) { system.out.println( "请创建您的昵称:" ); name = scan.nextline(); if (name.trim().equals( "" )) { system.out.println( "昵称不得为空" ); } else { pw.println(name); string pass = br.readline(); if (pass != null && (!pass.equals( "ok" ))) { system.out.println( "昵称已经被占用,请重新输入:" ); } else { system.out.println( "昵称“" +name+ "”已设置成功,可以开始聊天了" ); break ; } } } } // 循环读取服务端发送过来的信息并输出到客户端的控制台 class listenrservser implements runnable { @override public void run() { try { bufferedreader br = new bufferedreader( new inputstreamreader(clientsocket.getinputstream(), "utf-8" )); string msgstring; while ((msgstring = br.readline())!= null ) { system.out.println(msgstring); } } catch (exception e) { e.printstacktrace(); } } } } |
运行结果:
开始自己的实现也不是很完整,后来也是借鉴别人比较好的思想后完善的,权当分享。
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/zhaokx3/article/details/52513019