本文实例为大家分享了java实现多人聊天室的具体代码，供大家参考，具体内容如下
程序源代码及运行截图：
server.java
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//server.java
package socket;
import java.io.bufferedreader;
import java.io.ioexception;
import java.io.inputstreamreader;
import java.io.printwriter;
import java.net.serversocket;
import java.net.socket;
import java.util.arraylist;
import java.util.list;
import java.util.scanner;
public class server implements runnable {// 服务端
static list<socket> socketlist=new arraylist<socket>();
// 读取 in
static socket socket = null;
static serversocket serversocket = null;
public server() {// 构造方法
try {
serversocket = new serversocket(9999);
} catch (ioexception e) {
e.printstacktrace();
}
}
public static void main(string[] args) {
scanner input = new scanner(system.in);
system.out.println("************服务端*************");
server t = new server();
int count = 0;
while (true) {
try {
// system.out.println("端口9999等待被连接......");
socket = serversocket.accept();
count++;
system.out.println("第" + count + "个客户已连接");
socketlist.add(socket);
} catch (ioexception e) {
// todo auto-generated catch block
e.printstacktrace();
}
print p = new print(socket);
thread read = new thread(t);
thread print = new thread(p);
read.start();
print.start();
}
}
@override
public void run() {
// 重写run方法
try {
thread.sleep(1000);
bufferedreader in = new bufferedreader(new inputstreamreader(socket
.getinputstream()));
while (true) {
string jieshou = in.readline();
system.out.println( jieshou);
for (int i = 0; i < socketlist.size(); i++) {
socket socket=socketlist.get(i);
printwriter out = new printwriter(socket.getoutputstream());
if (socket!=this.socket) {
out.println(jieshou);
}else{
out.println("(你)"+jieshou);
}
out.flush();
}
}
} catch (exception e) {
e.printstacktrace();
}
}
}
class print implements runnable {
static list<socket> socketlist=new arraylist<socket>();
scanner input = new scanner(system.in);
public print(socket s) {// 构造方法
try {
socketlist.add(s);
} catch (exception e) {
e.printstacktrace();
}
}
@override
public void run() {
try {
thread.sleep(1000);
while (true) {
string msg = input.next();
for (int i = 0; i < socketlist.size(); i++) {
socket socket=socketlist.get(i);
printwriter out = new printwriter(socket.getoutputstream());
// system.out.println("对客户端说：");
out.println("服务端说："+msg);
out.flush();
}
}
} catch (exception e) {
// todo: handle exception
e.printstacktrace();
}
}
}
client.java
//client.java
package socket;
import java.io.bufferedreader;
import java.io.inputstreamreader;
import java.io.printwriter;
import java.net.socket;
import java.util.scanner;
public class client implements runnable {// 客户端
static socket socket = null;
scanner input = new scanner(system.in);
static string name=null;
public static void main(string[] args) {
int x=(int)(math.random()*100);
client.name="client"+x;
system.out.println("************客户端"+x+"*************");
try {
socket = new socket("127.0.0.1", 9999);
system.out.println("已经连上服务器了");
} catch (exception e) {
e.printstacktrace();
}
client t = new client();
read r = new read(socket);
thread print = new thread(t);
thread read = new thread(r);
print.start();
read.start();
}
@override
public void run() {
try {
thread.sleep(1000);
printwriter out = new printwriter(socket.getoutputstream());
while (true) {
string msg = input.next();
out.println(name+"说:"+msg);
out.flush();
}
} catch (exception e) {
e.printstacktrace();
}
}
}
class read implements runnable {
static socket socket = null;
public read(socket socket) {
this.socket = socket;
}
@override
public void run() {
try {
thread.sleep(1000);
bufferedreader in = new bufferedreader(new inputstreamreader(socket
.getinputstream()));
while (true) {
system.out.println( in.readline());
}
} catch (exception e) {
e.printstacktrace();
}
}
}
测试数据一：
服务端程序运行截图：
客户端1程序运行截图：
客户端2程序运行截图：
由测试数据一可以看出：程序可以实现多人聊天，并且效果和性能还算可以。而且每个客户端连接进服务器时，都会随机产生一个随机数作为自身的标志，避免通话过程中，分辨不清彼此，而导致交流效果不好。
测试数据二：
服务端运行截图：
客户端1程序运行截图：
客户端2程序运行截图：
客户端3程序运行截图：
客户端4程序运行截图：
客户端5程序运行截图：
客户端6程序运行截图：
客户端7程序运行截图：
客户端8程序运行截图：
客户端9程序运行截图：
客户端10程序运行截图：
测试二一共连入了10个客户端进行程序稳定性的测试，程序运行结果稳定，符合实验预期结果，充分说明了程序的鲁棒性较强。
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移动技术网。
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