Netty實戰-對象編解碼，Netty對象網路傳遞

標籤：netty實戰 解決tcp粘包

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       執行個體代碼 ： http://download.csdn.net/detail/jiangtao_st/7677503

1. Server端代碼
   

   <span style="font-size:12px;">/** *  * <p> * Netty Server Simple * </p> *  * LineBasedFrameDecoder + 訊息中得分行符號 *  * @author 卓軒 * @建立時間：2014年7月7日 * @version： V1.0 */public class NettyServer {private final int port = 8989;@Testpublic void nettyServer(){EventLoopGroup bossGroup = new NioEventLoopGroup();EventLoopGroup workerGroup = new NioEventLoopGroup();try {ServerBootstrap serverBootstrap = new ServerBootstrap();serverBootstrap.group(bossGroup,workerGroup).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 1024).childHandler(new ChildChannelHandler());//綁定連接埠、同步等待ChannelFuture futrue = serverBootstrap.bind(port).sync();//等待服務監聽連接埠關閉futrue.channel().closeFuture().sync();} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{//退出，釋放線程等相關資源bossGroup.shutdownGracefully();workerGroup.shutdownGracefully();}}private class ChildChannelHandler extends ChannelInitializer<SocketChannel>{@Overrideprotected void initChannel(SocketChannel ch) throws Exception {//ch.pipeline().addLast(new LineBasedFrameDecoder(1024));////ByteBuf delimiter = Unpooled.copiedBuffer("$_".getBytes());//ch.pipeline().addLast(new DelimiterBasedFrameDecoder(2048, delimiter));////ch.pipeline().addLast(new FixedLengthFrameDecoder(20));ch.pipeline().addLast(new ObjectDecoder(1024*1024,ClassResolvers.weakCachingConcurrentResolver(this.getClass().getClassLoader())));ch.pipeline().addLast(new ObjectEncoder());ch.pipeline().addLast(new StringDecoder());ch.pipeline().addLast(new UserRespServerHandler());}}}</span>

2. Client端代碼
   

   <span style="font-size:12px;">/** *  * <p> * NettyClient  實現 * </p> *  * @author 卓軒 * @建立時間：2014年7月7日 * @version： V1.0 */public class NettyClient {public void connect(int port,String host){EventLoopGroup group = new NioEventLoopGroup();try {Bootstrap bootstrap = new Bootstrap();bootstrap.group(group).channel(NioSocketChannel.class).option(ChannelOption.TCP_NODELAY, true).handler(new ChannelInitializer<SocketChannel>() {@Overrideprotected void initChannel(SocketChannel ch) throws Exception {ch.pipeline().addLast(new ObjectDecoder(1024,ClassResolvers.weakCachingConcurrentResolver(this.getClass().getClassLoader())));ch.pipeline().addLast(new ObjectEncoder());ch.pipeline().addLast(new StringDecoder());ch.pipeline().addLast(new UserQueryClientHandler());}});//發起非同步連結操作ChannelFuture channelFuture = bootstrap.connect(host, port).sync();channelFuture.channel().closeFuture().sync();} catch (InterruptedException e) {// TODO Auto-generated catch blocke.printStackTrace();}finally{//關閉，釋放線程資源group.shutdownGracefully();}}@Testpublic void nettyClient(){new NettyClient().connect(8989, "localhost");}}</span>

3. ServerHander 代碼
   

   <span style="font-size:12px;">/** *  * <p> *  使用者查詢返回 * </p> *  * @author 卓軒 * @建立時間：2014年7月7日 * @version： V1.0 */public class UserRespServerHandler extends ChannelInboundHandlerAdapter {@Overridepublic void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {UserQuery userQuery = (UserQuery) msg;System.out.println("收到來自用戶端的查詢請求:"+ String.valueOf(userQuery));if(userQuery != null && userQuery.getUserId()!= 0){UserDO userDO = getUserById(userQuery.getUserId());ctx.writeAndFlush(userDO);}}@Overridepublic void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {System.out.println("Server has Exception,"+ cause.getCause());}private UserDO getUserById(int userId){if(userId % 2 == 0){UserDO zhuoxuan = new UserDO();zhuoxuan.setUserId(userId);zhuoxuan.setSex(1);zhuoxuan.setUname("卓軒");zhuoxuan.setUnick("zhuoxuan");zhuoxuan.setEmail("[email protected]");return zhuoxuan;}else{UserDO zhuoxuan = new UserDO();zhuoxuan.setUserId(userId);zhuoxuan.setSex(1);zhuoxuan.setUname("張三");zhuoxuan.setUnick("zhangsan");zhuoxuan.setEmail("[email protected]");return zhuoxuan;}}}</span><strong style="font-size: 14px;"></strong>

   
   
4. ClientHander 代碼

<span style="font-size:12px;">/** *  * <p> * 使用者查詢請求 Handler * </p> *  * @author 卓軒 * @建立時間：2014年7月7日 * @version： V1.0 */public class UserQueryClientHandler extends ChannelInboundHandlerAdapter {public UserQueryClientHandler() {}@Overridepublic void channelActive(ChannelHandlerContext ctx) throws Exception {for (int i = 0; i < 100; i++) {UserQuery userQuery = new UserQuery();userQuery.setUserId(1001+i);ctx.write(userQuery);}ctx.flush();}@Overridepublic void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {String message = String.valueOf(msg);System.out.println("Netty-Client:Receive Message,"+ message);}@Overridepublic void channelReadComplete(ChannelHandlerContext ctx) throws Exception {ctx.flush();}@Overridepublic void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {System.out.println("Client has Exception,"+ cause.getCause());}}</span>