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Server.java
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84 lines (73 loc) · 3.37 KB
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package com.example.nio.selector;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.Selector;
import java.nio.channels.ServerSocketChannel;
import java.nio.channels.SocketChannel;
import java.util.Iterator;
/**
* Created by guolei on 16-8-7.
* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
* | 没有神兽，风骚依旧！ |
* | QQ:1120832563 |
* ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
*/
/**
* 参考资料
* http://blog.csdn.net/u013256816/article/details/51457215
* http://blog.csdn.net/chenxuegui1234/article/details/17979725
* http://kinghoo.iteye.com/blog/2300701
* http://www.blogjava.net/heyang/archive/2011/01/03/342193.html
* https://examples.javacodegeeks.com/core-java/nio/channels/selector-channels/java-nio-channels-selector-example/
*/
public class Server {
public static void main(String[] args){
Selector selector;
ServerSocketChannel ssc ;
try {
selector = Selector.open();
ssc = ServerSocketChannel.open();
ssc.socket().bind(new InetSocketAddress(3333));
ssc.configureBlocking(false);
int ops = ssc.validOps();
ssc.register(selector, ops,null);
while (true){
if (selector.select(3000) == 0){
System.err.println("没有合适的，继续等待");
continue;
}
Iterator<SelectionKey> iterator = selector.selectedKeys().iterator();
while (iterator.hasNext()){
SelectionKey key = iterator.next();
if (key.isAcceptable()){
SocketChannel socketChannel = ssc.accept();
socketChannel.configureBlocking(false);
socketChannel.register(selector,SelectionKey.OP_READ);
System.err.println("Connection accept : -----------" + socketChannel.getLocalAddress());
}else if (key.isReadable()){
SocketChannel socketChannel = (SocketChannel) key.channel();
ByteBuffer byteBuffer = ByteBuffer.allocate(1024);
socketChannel.read(byteBuffer);
String string = new String(byteBuffer.array()).trim();
System.err.println("Message received---->" + string);
if ("end".equals(string)){
socketChannel.register(selector,SelectionKey.OP_WRITE);
}
}else if (key.isWritable()){
byte[] b = new String("好的，你的消息我收到了").getBytes("utf-8");
ByteBuffer byteBuffer = ByteBuffer.wrap(b);
SocketChannel socketChannel = (SocketChannel) key.channel();
socketChannel.write(byteBuffer);
socketChannel.close();
ssc.close();
}
iterator.remove();
}
}
} catch (IOException e) {
e.printStackTrace();
}
}
}