{"id":35542,"date":"2025-05-04T17:40:54","date_gmt":"2025-05-04T09:40:54","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/35542.html"},"modified":"2025-05-04T17:40:54","modified_gmt":"2025-05-04T09:40:54","slug":"netty%e9%ab%98%e5%b9%b6%e5%8f%91%e8%81%8a%e5%a4%a9%e6%9c%8d%e5%8a%a1%e5%99%a8%e5%ae%9e%e6%88%98%ef%bc%9a%e5%8d%8f%e8%ae%ae%e8%ae%be%e8%ae%a1%e3%80%81%e6%80%a7%e8%83%bd%e4%bc%98%e5%8c%96%e4%b8%8espring","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/35542.html","title":{"rendered":"Netty\u9ad8\u5e76\u53d1\u804a\u5929\u670d\u52a1\u5668\u5b9e\u6218\uff1a\u534f\u8bae\u8bbe\u8ba1\u3001\u6027\u80fd\u4f18\u5316\u4e0eSpring Boot\u96c6\u6210"},"content":{"rendered":"

\u76ee\u5f55<\/p>\n

\u4e00\u3001\u6280\u672f\u9009\u578b<\/p>\n

\u4e8c\u3001\u9879\u76ee\u521d\u59cb\u5316\u4e0e\u4f9d\u8d56\u914d\u7f6e<\/p>\n

1.1 \u521b\u5efa Maven \u9879\u76ee<\/p>\n

\u4e09\u3001\u670d\u52a1\u7aef\u5b9e\u73b0<\/p>\n

2.1 \u670d\u52a1\u7aef\u542f\u52a8\u7c7b\uff08ChatServer\uff09<\/p>\n

2.2 \u670d\u52a1\u7aef\u5904\u7406\u5668\u521d\u59cb\u5316\uff08ChatServerInitializer\uff09<\/p>\n

2.3 \u6d88\u606f\u5904\u7406\u5668\uff08ChatServerHandler\uff09<\/p>\n

\u56db\u3001\u5ba2\u6237\u7aef\u5b9e\u73b0<\/p>\n

3.1 \u5ba2\u6237\u7aef\u542f\u52a8\u7c7b\uff08ChatClient\uff09<\/p>\n

3.2 \u5ba2\u6237\u7aef\u5904\u7406\u5668\u521d\u59cb\u5316\uff08ChatClientInitializer\uff09<\/p>\n

3.3 \u5ba2\u6237\u7aef\u6d88\u606f\u5904\u7406\u5668\uff08ChatClientHandler\uff09<\/p>\n

\u4e94\u3001\u6838\u5fc3\u529f\u80fd\u6269\u5c55<\/p>\n

4.1 \u7c98\u5305\/\u62c6\u5305\u5904\u7406<\/p>\n

4.2 \u5fc3\u8df3\u68c0\u6d4b\u4e0e\u8fde\u63a5\u4fdd\u6d3b<\/p>\n

4.3 \u7fa4\u804a\u529f\u80fd\u5b9e\u73b0<\/p>\n

\u516d\u3001\u8fd0\u884c\u4e0e\u6d4b\u8bd5<\/p>\n

\u4e03\u3001\u5b8c\u6574\u4ee3\u7801\u7ed3\u6784<\/p>\n

\u516b\u3001\u5173\u952e\u70b9\u603b\u7ed3<\/p>\n

\u4e5d\u3001\u8fdb\u9636\u4f18\u5316\u65b9\u5411<\/p>\n

\u5341\u3001Netty \u9ad8\u5e76\u53d1\u804a\u5929\u670d\u52a1\u5668\u5e38\u89c1\u95ee\u9898\u53ca\u89e3\u51b3\u65b9\u6848<\/p>\n

1. \u8fde\u63a5\u6570\u6fc0\u589e\u5bfc\u81f4\u5185\u5b58\u6cc4\u9732\u6216 OOM<\/p>\n

2. \u9ad8\u5e76\u53d1\u4e0b\u6d88\u606f\u4e22\u5931\u3001\u987a\u5e8f\u9519\u4e71<\/p>\n

3. \u5ba2\u6237\u7aef\u9891\u7e41\u65ad\u8fde\uff08\u5fc3\u8df3\u4e22\u5931\uff09<\/p>\n

4. \u7ebf\u7a0b\u963b\u585e\u5bfc\u81f4\u53cd\u5e94\u8fdf\u949d<\/p>\n

5. \u7c98\u5305\/\u62c6\u5305\u95ee\u9898<\/p>\n

6. \u5e7f\u64ad\u6d88\u606f\u6027\u80fd\u74f6\u9888<\/p>\n

7. \u5355\u673a\u627f\u8f7d\u80fd\u529b\u6709\u9650<\/p>\n

8. SSL\/TLS\u52a0\u5bc6\u5bfc\u81f4\u541e\u5410\u4e0b\u964d<\/p>\n

\"\"<\/p>\n

\u4e00\u3001\u6280\u672f\u9009\u578b<\/h2>\n\n\n\n\n\n\n
\u6280\u672f<\/td>\n\u7528\u9014<\/td>\n<\/tr>\n
Netty 4.x<\/td>\n\u7f51\u7edc\u901a\u4fe1<\/td>\n<\/tr>\n
Java 8+<\/td>\n\u57fa\u7840\u5f00\u53d1<\/td>\n<\/tr>\n
Maven<\/td>\n\u9879\u76ee\u6784\u5efa<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\n

\u4e8c\u3001\u9879\u76ee\u521d\u59cb\u5316\u4e0e\u4f9d\u8d56\u914d\u7f6e<\/h2>\n

1.1 \u521b\u5efa Maven \u9879\u76ee<\/h3>\n

\u5728 pom.xml \u4e2d\u6dfb\u52a0 Netty \u4f9d\u8d56\uff1a<\/p>\n

<dependencies>
\n <!– Netty \u6838\u5fc3\u4f9d\u8d56 –>
\n <dependency>
\n <groupId>io.netty<\/groupId>
\n <artifactId>netty-all<\/artifactId>
\n <version>4.1.68.Final<\/version> <!– \u4f7f\u7528\u6700\u65b0\u7a33\u5b9a\u7248\u672c –>
\n <\/dependency>
\n <!– JSON \u5e8f\u5217\u5316\uff08\u53ef\u9009\uff0c\u7528\u4e8e\u6d88\u606f\u5bf9\u8c61\u8f6c\u6362\uff09 –>
\n <dependency>
\n <groupId>com.fasterxml.jackson.core<\/groupId>
\n <artifactId>jackson-databind<\/artifactId>
\n <version>2.15.2<\/version>
\n <\/dependency>
\n<\/dependencies> <\/p>\n

\n

\u4e09\u3001\u670d\u52a1\u7aef\u5b9e\u73b0<\/h2>\n

2.1 \u670d\u52a1\u7aef\u542f\u52a8\u7c7b\uff08ChatServer\uff09<\/h3>\n

\u670d\u52a1\u7aef\u542f\u52a8\u5668<\/p>\n

public class ChatServer {
\n private final int port;
\n public ChatServer(int port) {
\n this.port = port;
\n }<\/p>\n

public void run() throws Exception {
\n EventLoopGroup bossGroup = new NioEventLoopGroup(); \/\/ \u7528\u4e8e\u5904\u7406\u8fde\u63a5\u8bf7\u6c42
\n EventLoopGroup workerGroup = new NioEventLoopGroup(); \/\/ \u7528\u4e8e\u5904\u7406\u6570\u636e\u8bfb\u5199
\n try {
\n ServerBootstrap b = new ServerBootstrap();
\n b.group(bossGroup, workerGroup)
\n .channel(NioServerSocketChannel.class)
\n .childHandler(new ChatServerInitializer()) \/\/ \u914d\u7f6e\u5904\u7406\u5668\u94fe
\n .option(ChannelOption.SO_BACKLOG, 128) \/\/ \u8fde\u63a5\u961f\u5217\u5927\u5c0f
\n .childOption(ChannelOption.SO_KEEPALIVE, true); \/\/ \u4fdd\u6301\u8fde\u63a5
\n \/\/ \u7ed1\u5b9a\u7aef\u53e3\u5e76\u542f\u52a8\u670d\u52a1\u5668
\n ChannelFuture f = b.bind(port).sync();
\n System.out.println(\\”\u670d\u52a1\u5668\u542f\u52a8\u6210\u529f\uff0c\u76d1\u542c\u7aef\u53e3\uff1a\\” + port);
\n f.channel().closeFuture().sync();
\n } finally {
\n bossGroup.shutdownGracefully();
\n workerGroup.shutdownGracefully();
\n }
\n }<\/p>\n

public static void main(String[] args) throws Exception {
\n int port = 8080;
\n new ChatServer(port).run();
\n }
\n} <\/p>\n

2.2 \u670d\u52a1\u7aef\u5904\u7406\u5668\u521d\u59cb\u5316\uff08ChatServerInitializer\uff09<\/h3>\n

\u7ba1\u9053\u521d\u59cb\u5316\u5668<\/p>\n

public class ChatServerInitializer extends ChannelInitializer<SocketChannel> {
\n @Override
\n protected void initChannel(SocketChannel ch) throws Exception {
\n ChannelPipeline pipeline = ch.pipeline();<\/p>\n

\/\/ \u6dfb\u52a0\u7f16\u89e3\u7801\u5668\uff08\u5904\u7406\u6d88\u606f\u62c6\u5305\/\u7c98\u5305\uff09
\n pipeline.addLast(new LengthFieldBasedFrameDecoder(1024 * 1024, 0, 4, 0, 4));
\n pipeline.addLast(new LengthFieldPrepender(4)); \/\/ \u53d1\u9001\u6d88\u606f\u65f6\u6dfb\u52a0\u957f\u5ea6\u5b57\u6bb5
\n \/\/ \u6dfb\u52a0\u5b57\u7b26\u4e32\u7f16\u89e3\u7801\u5668\uff08\u53ef\u66ff\u6362\u4e3a\u81ea\u5b9a\u4e49\u534f\u8bae\uff09
\n pipeline.addLast(new StringDecoder());
\n pipeline.addLast(new StringEncoder());
\n \/\/ \u6dfb\u52a0\u81ea\u5b9a\u4e49\u5904\u7406\u5668
\n pipeline.addLast(new ChatServerHandler());
\n }
\n} <\/p>\n

2.3 \u6d88\u606f\u5904\u7406\u5668\uff08ChatServerHandler\uff09<\/h3>\n

\u4e1a\u52a1\u903b\u8f91\u5904\u7406<\/p>\n

@Sharable
\npublic class ChatServerHandler extends SimpleChannelInboundHandler<String> {
\n \/\/ \u5728\u7ebf\u7528\u6237\u5217\u8868\uff08\u7b80\u5316\u7248\uff0c\u5b9e\u9645\u5e94\u4f7f\u7528\u7ebf\u7a0b\u5b89\u5168\u7684\u96c6\u5408\uff09
\n private static final Map<String, Channel> onlineUsers = new HashMap<>();
\n @Override
\n public void channelActive(ChannelHandlerContext ctx) throws Exception {
\n System.out.println(\\”\u5ba2\u6237\u7aef\u8fde\u63a5\uff1a\\” + ctx.channel().remoteAddress());
\n }<\/p>\n

@Override
\n protected void channelRead0(ChannelHandlerContext ctx, String msg) throws Exception {
\n \/\/ \u5904\u7406\u6d88\u606f\u903b\u8f91\uff08\u5982\u767b\u5f55\u3001\u804a\u5929\u3001\u7fa4\u53d1\u7b49\uff09
\n if (msg.startsWith(\\”LOGIN:\\”)) {
\n String username = msg.split(\\”:\\”)[1];
\n onlineUsers.put(username, ctx.channel());
\n ctx.writeAndFlush(\\”\u767b\u5f55\u6210\u529f\uff01\u5f53\u524d\u5728\u7ebf\u7528\u6237\uff1a\\” + onlineUsers.keySet());
\n } else if (msg.startsWith(\\”SEND:\\”)) {
\n String[] parts = msg.split(\\”:\\”);
\n String toUser = parts[1];
\n String content = parts[2];
\n Channel toChannel = onlineUsers.get(toUser);
\n if (toChannel != null && toChannel.isOpen()) {
\n toChannel.writeAndFlush(\\”\u6765\u81ea \\” + ctx.channel().remoteAddress() + \\” \u7684\u6d88\u606f\uff1a\\” + content);
\n } else {
\n ctx.writeAndFlush(\\”\u7528\u6237 \\” + toUser + \\” \u4e0d\u5728\u7ebf\uff01\\”);
\n }
\n } else {
\n ctx.writeAndFlush(\\”\u672a\u77e5\u6307\u4ee4\uff0c\u8bf7\u4f7f\u7528 LOGIN:username \u6216 SEND:toUser:message\\”);
\n }
\n }<\/p>\n

@Override
\n public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
\n cause.printStackTrace();
\n ctx.close();
\n }<\/p>\n

@Override
\n public void channelInactive(ChannelHandlerContext ctx) throws Exception {
\n System.out.pri<\/p>\n","protected":false},"excerpt":{"rendered":"

\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb1k\u6b21\uff0c\u70b9\u8d5e31\u6b21\uff0c\u6536\u85cf19\u6b21\u30021.\u7f16\u89e3\u7801\u5668\uff1a\u901a\u8fc7\u89e3\u51b3\u7c98\u5305\u95ee\u9898\uff0c\u751f\u6210\u957f\u5ea6\u5b57\u6bb5\u30022.\u4e8b\u4ef6\u9a71\u52a8\uff1aNetty \u7684\u5904\u7406\u6d88\u606f\u3001\u8fde\u63a5\u72b6\u6001\u53d8\u5316\u7b49\u4e8b\u4ef6\u30023.\u8d44\u6e90\u7ba1\u7406\uff1a\u4f7f\u7528\u7ba1\u7406\u5728\u7ebf\u7528\u6237\uff0c\u786e\u4fdd\u7ebf\u7a0b\u5b89\u5168\u30024.\u6269\u5c55\u6027\uff1a\u901a\u8fc7\u7075\u6d3b\u6dfb\u52a0\u5904\u7406\u5668\uff08\u5982\u5b89\u5168\u8ba4\u8bc1\u3001\u65e5\u5fd7\u8bb0\u5f55\uff09\u3002\u7c98\u5305\u62c6\u5305\u5904\u7406\uff1a\u81ea\u5b9a\u4e49 $_ \u5206\u9694\u7b26\u5e7f\u64ad\u6d88\u606f\u7b80\u5355\u7684\u5f02\u5e38\u5904\u7406\u3002<\/p>\n","protected":false},"author":2,"featured_media":35541,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[1826,98,220,2989],"topic":[],"class_list":["post-35542","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-netty","tag-spring-boot","tag-220","tag-2989"],"yoast_head":"\nNetty\u9ad8\u5e76\u53d1\u804a\u5929\u670d\u52a1\u5668\u5b9e\u6218\uff1a\u534f\u8bae\u8bbe\u8ba1\u3001\u6027\u80fd\u4f18\u5316\u4e0eSpring Boot\u96c6\u6210 - 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