服务端代码
package com.aisuo.cn.run;
import java.io.IOException;
import java.net.DatagramSocket;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.nio.channels.DatagramChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.charset.Charset;
import java.nio.charset.CharsetDecoder;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Queue;
import java.util.Set;
import java.util.concurrent.LinkedBlockingQueue;
public class AutoRunServer3 implements Runnable {
private static final int port = 59000;
private Charset cs = Charset.forName("utf-8");
private static ByteBuffer sBuffer = ByteBuffer.allocate(514);
private static ByteBuffer rBuffer = ByteBuffer.allocate(514);
private Queue<Map<DatagramChannel, SocketAddress>> clientsQueue = new LinkedBlockingQueue<Map<DatagramChannel, SocketAddress>>();
private static Selector selector;
private static Queue<String> queue = new LinkedBlockingQueue<String>();
public AutoRunServer3() {
try {
init();
} catch (Exception e) {
e.printStackTrace();
}
}
private void init() throws IOException {
DatagramChannel serverSocketChannel = DatagramChannel.open();
serverSocketChannel.configureBlocking(false);
DatagramSocket serverSocket = serverSocketChannel.socket();
serverSocket.bind(new InetSocketAddress(port));
selector = Selector.open();
serverSocketChannel.register(selector, SelectionKey.OP_READ);
System.out.println("server start on port:" + port + "；" + new Date());
}
private void handle(SelectionKey selectionKey) throws IOException {
DatagramChannel client = null;
String receiveText = null;
//int count = 0;
if (selectionKey.isReadable()) {
client = (DatagramChannel) selectionKey.channel();
rBuffer.clear();
//count = client.read(rBuffer);
//if (count > 0) {
SocketAddress sa = client.receive(rBuffer);
System.out.println(sa);
rBuffer.flip();
System.out.println(rBuffer.get(0));
System.out.println(rBuffer.toString());
byte[] ba = rBuffer.array();
System.out.println(client.toString() + ":" + CRC16M.getBufHexStr(ba));
//dispatch(client, receiveText);
setClient(client, receiveText, sa);
//client = (DatagramChannel) selectionKey.channel();
//client.register(selector, SelectionKey.OP_READ);
//}
}
}
private void setClient(DatagramChannel client, String info, SocketAddress sa) {
String name = "[" + sa + ":" + Integer.toHexString(client.hashCode()) + "]";
System.out.println("插入：" + name);
Map<DatagramChannel, SocketAddress> map = new HashMap<DatagramChannel, SocketAddress>();
map.put(client, sa);
clientsQueue.offer(map);
}
private void dispatch(String sendMsg) throws IOException, InterruptedException {
System.out.println("sendMsg:" + sendMsg);
Map<DatagramChannel, SocketAddress> temp = clientsQueue.poll();
for (Map.Entry<DatagramChannel, SocketAddress> cc : temp.entrySet()) {
DatagramChannel dc = cc.getKey();
SocketAddress sa = cc.getValue();
sBuffer.clear();
sBuffer.put(sendMsg.getBytes());
sBuffer.flip();
//输出到通道
if (null != sa)
dc.send(ByteBuffer.wrap(sendMsg.getBytes()), sa);
}
}
private void putCmd() {
/*Scanner sc = new Scanner(System.in);
String next = sc.next();
System.out.println("输入:" + next);*/
for (int i = 0; i < 10; i++) {
queue.offer("test" + i);
}
System.out.println("queue:" + queue.size());
}
public static void putCmd(String cmd) {
queue.offer(cmd);
}
public static void main(String[] args) {
AutoRunServer3 ars = new AutoRunServer3();
//ars.putCmd();
new Thread(ars).start();
}
@Override
public void run() {
// TODO Auto-generated method stub
while (true) {
try {
selector.select();//返回值为本次触发的事件数
Set<SelectionKey> selectionKeys = selector.selectedKeys();
for (SelectionKey key : selectionKeys) {
handle(key);
}
selectionKeys.clear();//清除处理过的事件
if (queue.size() > 0) {
String sendMsg = queue.poll();
if (null != sendMsg) {
//队列中存在需要发送的报文
dispatch(sendMsg);
}
System.out.println("Last_queue:" + queue.size());
}
} catch (Exception e) {
e.printStackTrace();
break;
}
}
}
}
客户端代码：
package com.aisuo.cn.run;
import java.net.InetSocketAddress;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.DatagramChannel;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.charset.Charset;
import java.util.Iterator;
import java.util.Set;
public class ClientTest implements Runnable {
@Override
public void run() {
DatagramChannel channel = null;
Selector selector = null;
SocketAddress sa = null;
int udpPort = 59000;
try {
channel = DatagramChannel.open();
channel.configureBlocking(false);
sa = new InetSocketAddress("192.168.1.103", udpPort);
selector = Selector.open();
channel.register(selector, SelectionKey.OP_READ);
ByteBuffer input = ByteBuffer.allocate(64);
input.clear();
input.put((byte)0xaa);
input.put((byte)0x55);
input.put((byte)0x0c);
input.put((byte)0x00);
input.put((byte)0x37);
input.put((byte)0x3f);
input.put((byte)0x01);
input.put((byte)0x26);
input.put((byte)0x01);
input.put((byte)0x80);
input.put((byte)0x01);
input.put((byte)0x00);
input.put((byte)0x00);
input.put((byte)0x00);
input.put((byte)0xfc);
input.put((byte)0x87);
input.flip();
int count = channel.send(input, sa);
System.out.println(count);
ByteBuffer byteBuffer = ByteBuffer.allocate(1000);
int eventsCount = selector.select();
System.out.println(eventsCount);
if (eventsCount > 0) {
Set<SelectionKey> selectedKeys = selector.selectedKeys();
Iterator<SelectionKey> iterator = selectedKeys.iterator();
while (iterator.hasNext()) {
SelectionKey sk = (SelectionKey) iterator.next();
if (sk.isReadable()) {
DatagramChannel datagramChannel = (DatagramChannel) sk.channel();
byteBuffer.clear();
SocketAddress isa = datagramChannel.receive(byteBuffer);
byteBuffer.flip();
System.out.println(Charset.defaultCharset().decode(byteBuffer).toString());
Thread.sleep(3000);//延时
datagramChannel.send(Charset.defaultCharset().encode("hello server"), isa);
}
}
}
} catch (Exception e) {
}
}
public static void main(String[] args) {
new Thread(new ClientTest()).start();
}
}
已测！！！！！