本文实例为大家分享了java socket编程实现多人交互聊天室的具体代码，供大家参考，具体内容如下
本项目由三个.java文件（client.java、server.java、ui.java）和一个.jpg图片文件组成ui.java是负责界面的构成文件。本聊天室的界面极其简单。主要分为两个界面：第一个是启动时需要登陆的界面如下：
输入名字进去以后就可以直接聊天
这个聊天室相当于群聊，每一个登陆进去的人发的信息，其他人都会收到。
使用指南：
1.运行server.java文件，保证服务端的开启
2.运行ui.java文件，界面登陆。每运行一个ui文件并登陆进去，就代表一个客户进了群聊中，可进行对话。
程序简单易懂，非常适合初学者练习网络编程的知识。
client.java
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import java.net.*;
import java.io.*;
import java.util.*;
public class client{
string name;
socket s;
ui ui;
//构造方法 ，把ui对象传过来
public client(ui ui){
this.ui = ui;
}
//从登陆界面获得名字并传去服务端
public void getname(string name){
try{
s = new socket("127.0.0.1",3000);
cli1 d = new cli1(s,ui);
d.start();
this.name = name;
dataoutputstream dos = new dataoutputstream(s.getoutputstream());
dos.writeutf(name);
}catch(exception e){
e.printstacktrace();
}
}
//从聊天界面获得要发送的内容并经服务器转发给各个客户端
public void say(string content){
try{
dataoutputstream dos = new dataoutputstream(s.getoutputstream());
dos.writeutf(content);
}catch(exception e){
e.printstacktrace();
}
}
}
//输入和输出
class cli1 extends thread {
ui ui;
socket s ;
public cli1(socket s,ui ui){
this.s = s;
this.ui=ui;
}
public void run(){
try{
while(true){
datainputstream dis = new datainputstream(s.getinputstream());
string content = dis.readutf();
if(!content.equals("")&&content!=null){
system.out.println(content);
ui.say(content);
}
}
}catch(exception e){
e.printstacktrace();
}
}
}
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server.java
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import java.net.*;
import java.io.*;
import java.util.*;
public class server{
static socket s;
static socket[] soc;
static string[] name;
static int k = 5,i =0,j;
public static void main(string[] args){
server ser = new server();
try{
serversocket ss = new serversocket(3000);
soc = new socket[k];
name = new string[k];
while(true){
s = ss.accept();
soc[i]= s;
j=i;
i++;
dataoutputstream dos = new dataoutputstream(s.getoutputstream());
datainputstream dis = new datainputstream(s.getinputstream());
name[j] = dis.readutf();
system.out.println(name[j]+"已进入群聊！");
dos.writeutf("欢迎你，"+name[j]);
new ser1().start();
}
}catch(connectexception e){
system.out.println("连接异常！！");
}catch(ioexception e){
e.printstacktrace();
}
}
}
class ser1 extends thread{
public int j;
public void run(){
try{
datainputstream read = new datainputstream((server.soc[server.j]).getinputstream());
j=server.j;
while(true){
string con = read.readutf();
if(con!=null){
system.out.println("该线程j为"+j);
for(int i = 0;i<server.soc.length;i++){
if((i!=j)&&(server.soc[i]!=null)){
dataoutputstream dos = new dataoutputstream((server.soc[i]).getoutputstream());
dos.writeutf(server.name[server.j]+"发送于 "+(new date()));
dos.writeutf(con);
}
}
}else{break;}
}
}catch(exception e){
e.printstacktrace();
}
}
}
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ui.java
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import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class ui{
//主方法
public static void main(string[] args){
ui ui = new ui();
ui.cli = new client(ui);
ui.initframe();
ui.showlogin();
}
ser1 ser1 = new ser1();
//初始化业务对象
public client cli = null;
public void initcli(){
}
//初始化主窗口
public int width = 720;
public int height = 550;
public jframe jframe = null; //界面窗口
public jlayeredpane layeredpane = null; //层叠容器
public jpanel backlayer = null; //背景层
public jpanel frontlayer = null; //前景层
public cardlayout cardlayout = null; //前景层布局器
public void initframe(){
jframe = new jframe("老友聚乐部");
layeredpane = new jlayeredpane();
layeredpane.setpreferredsize(new dimension(width, height));
jframe.add(layeredpane);
jframe.setresizable(false);
jframe.pack();
jframe.setvisible(true);
jframe.setdefaultcloseoperation(jframe.exit_on_close);
backlayer = new jpanel();
((flowlayout)backlayer.getlayout()).sethgap(0);
((flowlayout)backlayer.getlayout()).setvgap(0);
backlayer.setsize(width,height);
backlayer.setlocation(0,0);
jlabel bg = new jlabel(new imageicon("12.jpg"));
backlayer.add(bg);
layeredpane.add(backlayer,new integer(0));
frontlayer = new jpanel();
cardlayout = new cardlayout(0,0);
frontlayer.setlayout(cardlayout);
frontlayer.setopaque(false);
frontlayer.setsize(width,height);
frontlayer.setlocation(0,0);
layeredpane.add(frontlayer,new integer(1));
}
//登录界面
public jpanel loginpane = null;
public jtextfield logincodeinput = null;
public jlabel logintipslabel = null;
public void showlogin(){
if(loginpane == null){
loginpane = new jpanel();
loginpane.setopaque(false);
box loginbox = box.createverticalbox();
loginbox.add(box.createverticalstrut(180));
jpanel welcome_panel = new jpanel();
welcome_panel.setopaque(false);
jlabel welcome_label = new jlabel("老友俱乐部");
welcome_label.setforeground(color.white);
welcome_label.setfont(new font("微软雅黑",font.plain,30));
welcome_panel.add(welcome_label);
loginbox.add(welcome_panel);
loginbox.add(box.createverticalstrut(50));
jpanel code_panel = new jpanel();
code_panel.setopaque(false);
jlabel code_label = new jlabel("姓名：");
code_label.setforeground(color.white);
code_label.setfont(new font("微软雅黑",font.plain,25));
code_panel.add(code_label);
logincodeinput = new jtextfield(10);
logincodeinput.setfont(new font("微软雅黑", font.plain,25));
code_panel.add(logincodeinput);
loginbox.add(code_panel);
loginbox.add(box.createverticalstrut(30));
jpanel btn_panel = new jpanel();
btn_panel.setopaque(false);
jbutton login_btn = new jbutton("登 录");
login_btn.setfont(new font("微软雅黑",font.plain,15));
btn_panel.add(login_btn);
jbutton reset_btn = new jbutton("重 置");
reset_btn.setfont(new font("微软雅黑",font.plain,15));
btn_panel.add(reset_btn);
loginbox.add(btn_panel);
loginbox.add(box.createverticalstrut(10));
jpanel tips_panel = new jpanel();
tips_panel.setopaque(false);
logintipslabel = new jlabel("");
logintipslabel.setforeground(new color(238,32,32));
logintipslabel.setfont(new font("微软雅黑",font.plain,20));
tips_panel.add(logintipslabel);
loginbox.add(tips_panel);
loginpane.add(loginbox);
frontlayer.add("loginpane",loginpane);
cardlayout.show(frontlayer,"loginpane");
frontlayer.validate();
logincodeinput.requestfocus();
reset_btn.addactionlistener(new actionlistener(){
public void actionperformed(actionevent ae){
logincodeinput.settext("");
logintipslabel.settext("");
logincodeinput.requestfocus();
}
});
login_btn.addactionlistener(new actionlistener(){
public void actionperformed(actionevent ae){
string code_str = logincodeinput.gettext();
if("".equals(code_str)){
logintipslabel.settext("姓名不能为空！");
logincodeinput.requestfocus();
}else{
cli.getname(code_str);
showtalk();
}
}
});
}else{
cardlayout.show(frontlayer,"loginpane");
logincodeinput.settext("");
logintipslabel.settext("");
logincodeinput.requestfocus();
}
}
//聊天主界面
public jpanel menupane = null;
public jtextarea input = null;
public jtextarea talk = new jtextarea(25,70);
public void showtalk(){
menupane = new jpanel();
menupane.setopaque(false);
menupane.setlayout(new borderlayout());
jpanel up = new jpanel();
box tipsbox = box.createverticalbox();
menupane.add(up,borderlayout.north); //北边顶上
up.add(tipsbox);
jlabel tips_label = new jlabel("在线朋友");
tips_label.setforeground(color.white);
tips_label.setfont(new font("微软雅黑",font.plain,20));
tips_label.setalignmentx(component.left_alignment);
tipsbox.add(tips_label);
tipsbox.add(box.createverticalstrut(10));
jlabel uptxt = new jlabel(""); //接收在线朋友(需完善)
tipsbox.add(uptxt);
jpanel talk_panel = new jpanel();//中间聊天对话框
talk_panel.setopaque(false);
menupane.add(talk_panel,borderlayout.west);
jscrollpane sp = new jscrollpane(talk);
talk_panel.add(talk);
box inputbox = box.createhorizontalbox(); //下边输入框
menupane.add(inputbox,borderlayout.south);
jpanel input_panel = new jpanel();
input_panel.setopaque(false); //放置输入框
input = new jtextarea(4,30);
input.setfont(new font("微软雅黑",font.plain,20));
input.setalignmentx(component.left_alignment);
input_panel.add(input);
inputbox.add(input_panel);
inputbox.add(box.createhorizontalstrut(0));
jbutton send_btn = new jbutton("发送");
send_btn.setfont(new font("微软雅黑",font.plain,15));
inputbox.add(send_btn);
frontlayer.add("menupane",menupane);
cardlayout.show(frontlayer,"menupane");
frontlayer.validate();
send_btn.addactionlistener(new actionlistener(){
public void actionperformed(actionevent ae){
string append = talk.gettext();
string content = input.gettext();
talk.settext(append+'\n'+content);
input.settext("");
cli.say(content);
}
});
}
public void say(string content){
if(talk!=null){
string append = talk.gettext();
talk.settext(append+'\n'+content);
}
}
}
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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。
原文链接：https://blog.csdn.net/linzammyy/article/details/51594445