import org.apache.log4j.Logger;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
public class NettyServerBootstrap {
private static Logger logger = Logger.getLogger(NettyServerBootstrap.class);
private int port;
public NettyServerBootstrap(int port) {
this.port = port;
bind();
}
private void bind() {
EventLoopGroup boss = new NioEventLoopGroup();
EventLoopGroup worker = new NioEventLoopGroup();
try {
ServerBootstrap bootstrap = new ServerBootstrap();
bootstrap.group(boss, worker);
bootstrap.channel(NioServerSocketChannel.class);
bootstrap.option(ChannelOption.SO_BACKLOG, 1024); //連接數
bootstrap.option(ChannelOption.TCP_NODELAY, true); //不延遲,消息立即發送
bootstrap.childOption(ChannelOption.SO_KEEPALIVE, true); //長連接
bootstrap.childHandler(new ChannelInitializer<SocketChannel>() {
@Override
protected void initChannel(SocketChannel socketChannel)
throws Exception {
ChannelPipeline p = socketChannel.pipeline();
p.addLast(new NettyServerHandler());
}
});
ChannelFuture f = bootstrap.bind(port).sync();
if (f.isSuccess()) {
logger.debug("啓動Netty服務成功,端口號:" + this.port);
System.out.println("啓動Netty服務成功,端口號:" + this.port);
}
// 關閉連接
f.channel().closeFuture().sync();
} catch (Exception e) {
logger.error("啓動Netty服務異常,異常信息:" + e.getMessage());
System.out.println("啓動Netty服務異常,異常信息:" + e.getMessage());
e.printStackTrace();
} finally {
boss.shutdownGracefully();
worker.shutdownGracefully();
}
}
public static void main(String[] args) throws InterruptedException {
NettyServerBootstrap server= new NettyServerBootstrap(9999);
}
}
//具體實現
import java.io.UnsupportedEncodingException;
import com.sun.xml.internal.fastinfoset.stax.events.Util;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerAdapter;
import io.netty.channel.ChannelHandlerContext;
public class NettyServerHandler extends ChannelHandlerAdapter {
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
ByteBuf buf = (ByteBuf) msg;
String recieved = getMessage(buf);
System.out.println("服務器接收到消息:" + recieved);
int i=0;
if(!Util.isEmptyString(recieved)&&i<2){
try {
ctx.writeAndFlush(getSendByteBuf("APPLE"));
i++;
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}
}
/*try {
ctx.writeAndFlush(getSendByteBuf("APPLE"));
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
}*/
}
/*
* 從ByteBuf中獲取信息 使用UTF-8編碼返回
*/
private String getMessage(ByteBuf buf) {
byte[] con = new byte[buf.readableBytes()];
buf.readBytes(con);
try {
return new String(con,"UTF-8");
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
return null;
}
}
private ByteBuf getSendByteBuf(String message)
throws UnsupportedEncodingException {
byte[] req = message.getBytes("UTF-8");
ByteBuf pingMessage = Unpooled.buffer();
pingMessage.writeBytes(req);
return pingMessage;
}
}
netty先啓動服務端,然後在啓動客戶端進行數據交互,這裏囉嗦一下