本文實例講述了java基于socket實現的客戶端和服務端通信功能。分享給大家供大家參考，具體如下：
以下代碼參考馬士兵的聊天項目，先運行chatserver.java實現端口監聽，然后再運行chatclient.java
客戶端實例
chatclient.java
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package socketdemo;import java.awt.*;import java.awt.event.*;import java.io.*;import java.net.*;public class chatclient extends frame { socket s = null; dataoutputstream dos = null; datainputstream dis = null; private boolean bconnected = false; textfield tftxt = new textfield(); textarea tacontent = new textarea(); thread trecv = new thread(new recvthread()); public static void main(string[] args) { new chatclient().launchframe(); } public void launchframe() { setlocation(400, 300); this.setsize(300, 300); add(tftxt, borderlayout.south); add(tacontent, borderlayout.north); pack(); this.addwindowlistener(new windowadapter() { @override public void windowclosing(windowevent arg0) { disconnect(); system.exit(0); } }); tftxt.addactionlistener(new tflistener()); setvisible(true); connect(); trecv.start(); } public void connect() { try { s = new socket("localhost", 8888); dos = new dataoutputstream(s.getoutputstream()); dis = new datainputstream(s.getinputstream()); system.out.println("connected!"); bconnected = true; } catch (unknownhostexception e) { e.printstacktrace(); } catch (ioexception e) { e.printstacktrace(); } } public void disconnect() { try { dos.close(); dis.close(); s.close(); } catch (ioexception e) { e.printstacktrace(); } /* * try { bconnected = false; trecv.join(); } catch(interruptedexception * e) { e.printstacktrace(); } finally { try { dos.close(); dis.close(); * s.close(); } catch (ioexception e) { e.printstacktrace(); } } */ } private class tflistener implements actionlistener { public void actionperformed(actionevent e) { string str = tftxt.gettext().trim(); // tacontent.settext(str); tftxt.settext(""); try { // system.out.println(s); dos.writeutf(str); dos.flush(); // dos.close(); } catch (ioexception e1) { e1.printstacktrace(); } } } private class recvthread implements runnable { public void run() { try { while (bconnected) { string str = dis.readutf(); // system.out.println(str); tacontent.settext(tacontent.gettext() + str + '\n'); } } catch (socketexception e) { system.out.println("退出了，bye!"); } catch (eofexception e) { system.out.println("推出了，bye - bye!"); } catch (ioexception e) { e.printstacktrace(); } } }} |
socket服務端代碼
chatserver.java
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package socketdemo;import java.io.*;import java.net.*;import java.util.*;public class chatserver { boolean started = false; serversocket ss = null; list<client> clients = new arraylist<client>(); public static void main(string[] args) { new chatserver().start(); } public void start() { try { ss = new serversocket(8888); started = true; } catch (bindexception e) { system.out.println("端口使用中...."); system.out.println("請關掉相關程序并重新運行服務器！"); system.exit(0); } catch (ioexception e) { e.printstacktrace(); } try { while (started) { socket s = ss.accept(); client c = new client(s); system.out.println("a client connected!"); new thread(c).start(); clients.add(c); // dis.close(); } } catch (ioexception e) { e.printstacktrace(); } finally { try { ss.close(); } catch (ioexception e) { // todo auto-generated catch block e.printstacktrace(); } } } class client implements runnable { private socket s; private datainputstream dis = null; private dataoutputstream dos = null; private boolean bconnected = false; public client(socket s) { this.s = s; try { dis = new datainputstream(s.getinputstream()); dos = new dataoutputstream(s.getoutputstream()); bconnected = true; } catch (ioexception e) { e.printstacktrace(); } } public void send(string str) { try { dos.writeutf(str); } catch (ioexception e) { clients.remove(this); system.out.println("對方退出了！我從list里面去掉了！"); // e.printstacktrace(); } } public void run() { try { while (bconnected) { string str = dis.readutf(); system.out.println(str); for (int i = 0; i < clients.size(); i++) { client c = clients.get(i); c.send(str); // system.out.println(" a string send !"); } /* * for(iterator<client> it = clients.iterator(); * it.hasnext(); ) { client c = it.next(); c.send(str); } */ /* * iterator<client> it = clients.iterator(); * while(it.hasnext()) { client c = it.next(); c.send(str); * } */ } } catch (eofexception e) { system.out.println("client closed!"); } catch (ioexception e) { e.printstacktrace(); } finally { try { if (dis != null) dis.close(); if (dos != null) dos.close(); if (s != null) { s.close(); // s = null; } } catch (ioexception e1) { e1.printstacktrace(); } } } }} |
本機測試運行結果：
關閉客戶端窗口后，提示信息如下：
希望本文所述對大家java程序設計有所幫助。
原文鏈接：https://blog.csdn.net/nuli888/article/details/51884931
