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70 lines (66 loc) · 2.4 KB
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package lbtech.obj;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.serialization.ClassResolvers;
import io.netty.handler.codec.serialization.ObjectDecoder;
import io.netty.handler.codec.serialization.ObjectEncoder;
import io.netty.handler.timeout.IdleStateHandler;
import java.util.concurrent.TimeUnit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Netty 客户端代码
*
*/
public class NioClient {
/**
* 日志对象
*/
protected Logger logger = LoggerFactory.getLogger(NioClient.class);
private static String host = "127.0.0.1";
private static int port = 9999;
public static Channel channel = null;
public static void main(String args[]) {
start();
}
/**
* 启动
*/
public static void start(){
EventLoopGroup workerGroup = new NioEventLoopGroup();
try {
Bootstrap b = new Bootstrap(); // (1)
b.group(workerGroup); // (2)
b.channel(NioSocketChannel.class); // (3)
b.option(ChannelOption.SO_KEEPALIVE, true); // (4)
b.handler(new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(SocketChannel ch) throws Exception {
//添加对象解码器 负责对序列化POJO对象进行解码 设置对象序列化最大长度为1M 防止内存溢出
//设置线程安全的WeakReferenceMap对类加载器进行缓存 支持多线程并发访问 防止内存溢出
ch.pipeline().addLast(new ObjectDecoder(1024*1024,ClassResolvers.weakCachingConcurrentResolver(this.getClass().getClassLoader())));
//添加对象编码器 在服务器对外发送消息的时候自动将实现序列化的POJO对象编码
ch.pipeline().addLast(new ObjectEncoder());
ch.pipeline().addLast(new NioClientHandler());
ch.pipeline().addLast("ping", new IdleStateHandler(25, 15, 10,TimeUnit.SECONDS));
channel = ch;
}
});
// Start the client.
ChannelFuture f = b.connect(host, port);
// Wait until the connection is closed.
f.channel().closeFuture().sync();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
workerGroup.shutdownGracefully();
}
}
}