如何在局域网内实现聊天
1、打开MyEclipse，创建一个JAVA PROJECT，填写项目名称（任意名称）
2、点FINISH完成创建，再选择项目名，右击新建class，只填Name空格，填个A.点finnish完成。
3、完成后进入java代码界面，把下面代码复制到里面就行啦
import java.net.*;
import java.io.*;
class A
{
public static void main(String[] args) throws Exception
{
DatagramSocket sendSocket = new DatagramSocket(9998); //发送端
DatagramSocket receSocket = new DatagramSocket(369); //接收端
new Thread(new MsgSend(sendSocket)).start(); //发送线程
new Thread(new MsgRece(receSocket)).start(); //接受线程
}
}
class MsgSend implements Runnable //发送
{
private DatagramSocket dsock;
public MsgSend(DatagramSocket dsock)
{
this.dsock= dsock;
}
public void run()
{
BufferedReader bufr = new BufferedReader(new InputStreamReader(System.in));
String lineStr = null;
try
{
while(true)
{
lineStr = bufr.readLine();
if(lineStr!=null)
{
if(lineStr.equals("over886"))
{
break;
}
else
{
byte[] dataBuf = lineStr.getBytes();
DatagramPacket dataPack = //数据打包
new DatagramPacket( dataBuf,
dataBuf.length,
InetAddress.getByName("192.168.1.255"),
369
);
dsock.send(dataPack);
}
}
}
bufr.close();
dsock.close();
}
catch(Exception e)
{
throw new RuntimeException("发送失败!");
}
}
}
class MsgRece implements Runnable //接收
{
private DatagramSocket dsock;
public MsgRece(DatagramSocket dsock)
{
this.dsock= dsock;
}
public void run()
{
try
{
while(true)
{
byte[] dataBuf = new byte[1024];
DatagramPacket dataPack = new DatagramPacket(dataBuf,dataBuf.length);
dsock.receive(dataPack); //将获取的数据保存到指定的数据包
String ip = dataPack.getAddress().getHostAddress();
String data = new String(dataPack.getData(),0,dataPack.getLength()); //getData缓冲区
int port = dataPack.getPort(); //返回端号
System.out.println();
System.out.println("来自ip为 "+ip+" <对方端口>: "+port+" 的消息");
System.out.println(data);
}
}
catch(Exception e)
{
throw new RuntimeException("接受失败!");
}
finally
{
dsock.close();
}
}
}
4、现在运行看看，在下方的控制台输入文字，在同一局域网的小伙伴是不是收到消息了？（小伙伴也要和你做同样的步骤完成java代码制作）
