做网站需要自己研发吗/百度指数

做网站需要自己研发吗,百度指数,网站构建的基本流程,清远网站开发sohu大纲 1.Netty实现HTTP服务器 2.Netty实现WebSocket 3.Netty实现的消息推送系统 (1)基于WebSocket的消息推送系统说明 (2)消息推送系统的PushServer (3)消息推送系统的连接管理封装 (4)消息推送系统的ping-pong探测 (5)消息推送系统的全连接推送 (6)消息推送系统的HTTP…

大纲

1.Netty实现HTTP服务器

2.Netty实现WebSocket

3.Netty实现的消息推送系统

(1)基于WebSocket的消息推送系统说明

(2)消息推送系统的PushServer

(3)消息推送系统的连接管理封装

(4)消息推送系统的ping-pong探测

(5)消息推送系统的全连接推送

(6)消息推送系统的HTTP响应和握手

(7)消息推送系统的运营客户端

(8)运营客户端连接PushServer

(9)运营客户端的Handler处理器

(10)运营客户端发送推送消息

(11)浏览器客户端接收推送消息

3.Netty实现的消息推送系统

(1)基于WebSocket的消息推送系统说明

(2)消息推送系统的PushServer

(3)消息推送系统的连接管理封装

(4)消息推送系统的ping-pong探测

(5)消息推送系统的全连接推送

(6)消息推送系统的HTTP响应和握手

(7)消息推送系统的运营客户端

(8)运营客户端连接PushServer

(9)运营客户端的Handler处理器

(10)运营客户端发送推送消息

(11)浏览器客户端接收推送消息

(1)基于WebSocket的消息推送系统说明

首先需要一个运营系统能够基于NettyClient和PushServer建立WebSocket长连接，然后浏览器客户端也要和PushServer建立好WebSocket长连接，接着运营系统会让NettyClient发送Push推送消息给PushServer，最后PushServer再把推送消息发送给浏览器客户端。

首先启动PushServer，然后打开多个网页客户端查看console，接着启动运营客系统在控制台输入消息，这样就可以完成一个完整的消息推送的交互了。

(2)消息推送系统的PushServer

public class NettyPushServer {private static final Logger logger = LogManager.getLogger(NettyPushServer.class);private static final int DEFAULT_PORT = 8998;private int port;public NettyPushServer(int port) {this.port = port;}public void start() throws Exception {logger.info("Netty Push Server is starting.");EventLoopGroup bossEventLoopGroup = new NioEventLoopGroup();EventLoopGroup workerEventLoopGroup = new NioEventLoopGroup();try {ServerBootstrap serverBootstrap = new ServerBootstrap();serverBootstrap.group(bossEventLoopGroup, workerEventLoopGroup).channel(NioServerSocketChannel.class).childHandler(new ChannelInitializer<SocketChannel>() {protected void initChannel(SocketChannel ch) throws Exception {ch.pipeline().addLast("logging", new LoggingHandler("DEBUG")).addLast("http-codec", new HttpServerCodec()).addLast("aggregator", new HttpObjectAggregator(65536)).addLast("http-chunked", new ChunkedWriteHandler()).addLast("netty-push-server-handler", new NettyPushServerHandler());}});ChannelFuture channelFuture = serverBootstrap.bind(port).sync();logger.info("Netty Push Server is started, listened[" + port + "].");channelFuture.channel().closeFuture().sync();} finally {bossEventLoopGroup.shutdownGracefully();workerEventLoopGroup.shutdownGracefully();}}public static void main(String[] args) throws Exception {NettyPushServer nettyHttpServer = new NettyPushServer(DEFAULT_PORT);nettyHttpServer.start();}
}public class NettyPushServerHandler extends SimpleChannelInboundHandler<Object> {private static final Logger logger = LogManager.getLogger(NettyPushServerHandler.class);@Overridepublic void channelActive(ChannelHandlerContext ctx) throws Exception {logger.info("Client Connection Established: " + ctx.channel());}@Overridepublic void channelInactive(ChannelHandlerContext ctx) throws Exception {logger.info("Client Disconnected: " + ctx.channel());}@Overrideprotected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {if (msg instanceof FullHttpRequest) {handleHttpRequest(ctx, (FullHttpRequest) msg);} else if(msg instanceof WebSocketFrame) {handleWebSocketFrame(ctx, (WebSocketFrame) msg);}}@Overridepublic void channelReadComplete(ChannelHandlerContext ctx) throws Exception {ctx.flush();}private void handleWebSocketFrame(ChannelHandlerContext ctx, WebSocketFrame webSocketFrame) {}private void handleHttpRequest(ChannelHandlerContext ctx, FullHttpRequest request) {}
}

(3)消息推送系统的连接管理封装

//用来管理连接
public class ChannelManager {private static ChannelGroup channelGroup = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);private static ConcurrentHashMap<String, ChannelId> channelIds = new ConcurrentHashMap<String, ChannelId>();public static void add(Channel channel) {channelGroup.add(channel);channelIds.put(channel.id().asShortText(), channel.id());}public static void remove(Channel channel) {channelGroup.remove(channel);channelIds.remove(channel.id().asShortText());}public static Channel get(String id) {return channelGroup.find(channelIds.get(id));}public static void pushToAllChannels(TextWebSocketFrame webSocketFrame) {channelGroup.writeAndFlush(webSocketFrame);}
}public class NettyPushServerHandler extends SimpleChannelInboundHandler<Object> {...@Overridepublic void channelActive(ChannelHandlerContext ctx) throws Exception {logger.info("Client Connection Established: " + ctx.channel());ChannelManager.add(ctx.channel());}@Overridepublic void channelInactive(ChannelHandlerContext ctx) throws Exception {logger.info("Client Disconnected: " + ctx.channel());ChannelManager.remove(ctx.channel());}...
}

(4)消息推送系统的ping-pong探测

public class NettyPushServerHandler extends SimpleChannelInboundHandler<Object> {...private WebSocketServerHandshaker webSocketServerHandshaker;...protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {if (msg instanceof FullHttpRequest) {handleHttpRequest(ctx, (FullHttpRequest) msg);} else if(msg instanceof WebSocketFrame) {handleWebSocketFrame(ctx, (WebSocketFrame) msg);}}private void handleWebSocketFrame(ChannelHandlerContext ctx, WebSocketFrame webSocketFrame) {//WebSocket网页客户端发送的是ping消息，它会不停的ping服务端，看看长连接是否存活和有效if (webSocketFrame instanceof PingWebSocketFrame) {logger.info("Receive ping frame from client: " + ctx.channel());WebSocketFrame pongWebSocketFrame = new PongWebSocketFrame(webSocketFrame.content().retain());ctx.channel().write(pongWebSocketFrame);return;}//WebSocket网页客户端发送一个请求过来，请求关闭这个WebSocket连接if (webSocketFrame instanceof CloseWebSocketFrame) {logger.info("Receive close WebSocket request from client: " + ctx.channel());webSocketServerHandshaker.close(ctx.channel(), ((CloseWebSocketFrame) webSocketFrame).retain());return;}...}...
}

(5)消息推送系统的全连接推送

public class NettyPushServerHandler extends SimpleChannelInboundHandler<Object> {...protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {if (msg instanceof FullHttpRequest) {handleHttpRequest(ctx, (FullHttpRequest) msg);} else if(msg instanceof WebSocketFrame) {handleWebSocketFrame(ctx, (WebSocketFrame) msg);}}private void handleWebSocketFrame(ChannelHandlerContext ctx, WebSocketFrame webSocketFrame) {//WebSocket网页客户端发送的是ping消息，它会不停的ping服务端，看看长连接是否存活和有效if (webSocketFrame instanceof PingWebSocketFrame) {logger.info("Receive ping frame from client: " + ctx.channel());WebSocketFrame pongWebSocketFrame = new PongWebSocketFrame(webSocketFrame.content().retain());ctx.channel().write(pongWebSocketFrame);return;}//WebSocket网页客户端发送一个请求过来，请求关闭这个WebSocket连接if (webSocketFrame instanceof CloseWebSocketFrame) {logger.info("Receive close WebSocket request from client: " + ctx.channel());webSocketServerHandshaker.close(ctx.channel(), ((CloseWebSocketFrame) webSocketFrame).retain());return;}//WebSocket网页客户端发送请求，但它不是text文本请求if (!(webSocketFrame instanceof TextWebSocketFrame)) {logger.error("Netty Push Server only support text frame, does not support other type frame.");String errorMsg = String.format("%s type frame is not supported.", webSocketFrame.getClass().getName());throw new UnsupportedOperationException(errorMsg);}//WebSocket网页客户端发送一个文本请求过来，是TextFrame类型的String request = ((TextWebSocketFrame)webSocketFrame).text();logger.info("Receive text frame[" + request + "] from client: " + ctx.channel());//构建响应TextWebSocketFrame response = new TextWebSocketFrame(request);//发送给所有连接，全连接推送ChannelManager.pushToAllChannels(response);}...
}

(6)消息推送系统的HTTP响应和握手

public class NettyPushServerHandler extends SimpleChannelInboundHandler<Object> {...private void handleHttpRequest(ChannelHandlerContext ctx, FullHttpRequest request) {if (!request.decoderResult().isSuccess() || (!"websocket".equals(request.headers().get("Upgrade")))) {DefaultFullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.BAD_REQUEST);sendHttpResponse(ctx, request, response);return;}logger.info("Receive handshake request from client: " + ctx.channel());//握手建立WebSocketServerHandshakerFactory factory = new WebSocketServerHandshakerFactory("ws://localhost:8998/push", null, false);webSocketServerHandshaker = factory.newHandshaker(request);if (webSocketServerHandshaker == null) {WebSocketServerHandshakerFactory.sendUnsupportedVersionResponse(ctx.channel());} else {webSocketServerHandshaker.handshake(ctx.channel(), request);logger.info("Netty push server handshake with client: " + ctx.channel());}}//HTTP响应private void sendHttpResponse(ChannelHandlerContext ctx, FullHttpRequest request, DefaultFullHttpResponse response) {if (response.status().code() != RESPONSE_CODE_OK) {ByteBuf byteBuf = Unpooled.copiedBuffer(response.status().toString(), CharsetUtil.UTF_8);response.content().writeBytes(byteBuf);logger.info("Http Response is not ok: " + byteBuf.toString(CharsetUtil.UTF_8));byteBuf.release();}ChannelFuture channelFuture = ctx.channel().writeAndFlush(response);if (response.status().code() != RESPONSE_CODE_OK) {channelFuture.addListener(ChannelFutureListener.CLOSE);}}...
}

(7)消息推送系统的运营客户端

public class OperationNettyClient {private static final Logger logger = LogManager.getLogger(OperationNettyClient.class);private static final String WEB_SOCKET_SCHEME = "ws";private static final String WSS_SCHEME = "wss";private static final String LOCAL_HOST = "127.0.0.1";private static final String PUSH_SERVER_URI = System.getProperty("url", "ws://127.0.0.1:8998/push");private static URI uri;private static String scheme;private static String host;private static int port;private static SslContext sslContext;private EventLoopGroup eventLoopGroup;public void start() throws Exception {//...}public static void main(String[] args) throws Exception {uri = new URI(PUSH_SERVER_URI);scheme = getScheme(uri);host = getHost(uri);port = getPort(uri, scheme);checkScheme(scheme);initSslContext(scheme);}private static String getScheme(URI pushServerUri) {return pushServerUri.getScheme() == null ? WEB_SOCKET_SCHEME : pushServerUri.getScheme();}private static String getHost(URI pushServerUri) {return pushServerUri.getHost() == null ? LOCAL_HOST : pushServerUri.getHost();}private static int getPort(URI pushServerUri, String scheme) {int port;if (pushServerUri.getPort() == -1) {if (WEB_SOCKET_SCHEME.equals(scheme)) {port = 80;} else if(WSS_SCHEME.equals(scheme)) {port = 443;} else {port = -1;}} else {port = pushServerUri.getPort();}return port;}//检查scheme是否是ws或wssprivate static void checkScheme(String scheme) {if (!WEB_SOCKET_SCHEME.equals(scheme) && !WSS_SCHEME.equals(scheme)) {logger.error("Only Support ws or wss scheme.");throw new RuntimeException("Only Support ws or wss scheme.");}}//如果WebSocket使用了SSL，也就是wss，那么初始化对应的sslContextprivate static void initSslContext(String scheme) throws Exception {boolean enableSSL = WSS_SCHEME.equals(scheme);if (enableSSL) {sslContext = SslContextBuilder.forClient().trustManager(InsecureTrustManagerFactory.INSTANCE).build();} else {sslContext = null;}}
}

(8)运营客户端连接PushServer

public class OperationNettyClient {private static final Logger logger = LogManager.getLogger(OperationNettyClient.class);private static final String WEB_SOCKET_SCHEME = "ws";private static final String WSS_SCHEME = "wss";private static final String LOCAL_HOST = "127.0.0.1";private static final String PUSH_SERVER_URI = System.getProperty("url", "ws://127.0.0.1:8998/push");private static final String INPUT_MESSAGE_QUIT = "quit";private static final String INPUT_MESSAGE_CLOSE = "close";private static final String INPUT_MESSAGE_PING = "ping";private static URI uri;private static String scheme;private static String host;private static int port;private static SslContext sslContext;private EventLoopGroup eventLoopGroup;public Channel start() throws Exception {logger.info("Operation Netty Client is connecting.");eventLoopGroup = new NioEventLoopGroup();WebSocketClientHandshaker webSocketClientHandshaker = WebSocketClientHandshakerFactory.newHandshaker(uri, WebSocketVersion.V13, null, true, new DefaultHttpHeaders());final OperationNettyClientHandler operationNettyClientHandler = new OperationNettyClientHandler(webSocketClientHandshaker);Bootstrap bootstrap = new Bootstrap();bootstrap.group(eventLoopGroup).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {protected void initChannel(SocketChannel ch) throws Exception {ChannelPipeline channelPipeline = ch.pipeline();if (sslContext != null) {channelPipeline.addLast(sslContext.newHandler(ch.alloc(), host, port));}channelPipeline.addLast(new HttpClientCodec()).addLast(new HttpObjectAggregator(65536)).addLast(WebSocketClientCompressionHandler.INSTANCE).addLast(operationNettyClientHandler);}});Channel channel = bootstrap.connect(uri.getHost(), port).sync().channel();logger.info("Operation Netty Client connected to push server.");operationNettyClientHandler.channelFuture().sync();return channel;}public void shutdownGracefully() {eventLoopGroup.shutdownGracefully();}public static void main(String[] args) throws Exception {uri = new URI(PUSH_SERVER_URI);scheme = getScheme(uri);host = getHost(uri);port = getPort(uri, scheme);checkScheme(scheme);initSslContext(scheme);OperationNettyClient operationNettyClient = new OperationNettyClient();try {Channel channel = operationNettyClient.start();} finally {operationNettyClient.shutdownGracefully();}}...
}

(9)运营客户端的Handler处理器

public class OperationNettyClientHandler extends SimpleChannelInboundHandler<Object> {private static final Logger logger = LogManager.getLogger(OperationNettyClientHandler.class);private WebSocketClientHandshaker webSocketClientHandshaker;private ChannelFuture channelFuture;public OperationNettyClientHandler(WebSocketClientHandshaker webSocketClientHandshaker) {this.webSocketClientHandshaker = webSocketClientHandshaker;}public ChannelFuture channelFuture() {return channelFuture;}@Overridepublic void handlerAdded(ChannelHandlerContext ctx) throws Exception {channelFuture = ctx.newPromise();}@Overridepublic void channelActive(ChannelHandlerContext ctx) throws Exception {webSocketClientHandshaker.handshake(ctx.channel());logger.info("Operation Netty Client send WebSocket handshake request.");}@Overridepublic void channelInactive(ChannelHandlerContext ctx) throws Exception {logger.info("netty client disconnected.");}protected void channelRead0(ChannelHandlerContext ctx, Object msg) throws Exception {Channel channel = ctx.channel();if (!webSocketClientHandshaker.isHandshakeComplete()) {try {webSocketClientHandshaker.finishHandshake(channel, (FullHttpResponse) msg);logger.info("Netty Client connected.");((ChannelPromise)channelFuture).setSuccess();} catch(WebSocketHandshakeException e) {logger.error("WebSocket handshake failed.", e);((ChannelPromise)channelFuture).setFailure(e);}return;}if (msg instanceof FullHttpResponse) {  FullHttpResponse response = (FullHttpResponse) msg;throw new IllegalStateException("Not Supported HTTP Response.");}WebSocketFrame webSocketFrame = (WebSocketFrame) msg;if (webSocketFrame instanceof TextWebSocketFrame) {TextWebSocketFrame textWebSocketFrame = (TextWebSocketFrame) webSocketFrame;logger.info("Receives text frame: " + textWebSocketFrame.text());} else if(webSocketFrame instanceof PongWebSocketFrame) {logger.info("Receives pong frame: " + webSocketFrame);} else if(webSocketFrame instanceof CloseWebSocketFrame) {logger.info("Receives close WebSocket frame, Netty Client is closing.");channel.close();}}@Overridepublic void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {logger.error("Operation Netty client handler exception caught.", cause);if (!channelFuture.isDone()) {((ChannelPromise)channelFuture).setFailure(cause);}ctx.close();}
}

(10)运营客户端发送推送消息

public class OperationNettyClient {...public void waitInputMessage(Channel channel) throws Exception {BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in));while(true) {logger.info("Wait for input message.");String message = bufferedReader.readLine();if (INPUT_MESSAGE_QUIT.equals(message)) {break;} else if(INPUT_MESSAGE_CLOSE.equals(message)) {channel.writeAndFlush(new CloseWebSocketFrame());channel.closeFuture().sync();break;} else if(INPUT_MESSAGE_PING.equals(message)) {WebSocketFrame webSocketFrame = new PingWebSocketFrame(Unpooled.wrappedBuffer(new byte[] {8, 1, 8, 1}));channel.writeAndFlush(webSocketFrame);} else {WebSocketFrame webSocketFrame = new TextWebSocketFrame(message);channel.writeAndFlush(webSocketFrame);}}}public static void main(String[] args) throws Exception {uri = new URI(PUSH_SERVER_URI);scheme = getScheme(uri);host = getHost(uri);port = getPort(uri, scheme);checkScheme(scheme);initSslContext(scheme);OperationNettyClient operationNettyClient = new OperationNettyClient();try {Channel channel = operationNettyClient.start();//运营客户端发送消息入口operationNettyClient.waitInputMessage(channel);} finally {operationNettyClient.shutdownGracefully();}}...
}

(11)浏览器客户端接收推送消息

<!DOCTYPE html>
<html lang="en"><head><meta http-equiv="content-type" content="text/html; charset=utf-8" /><title>websocket网页</title></head><body onload="connectServer();"><script type="text/javascript">var websocket;function connectServer() {if ("WebSocket" in window) {console.log("your browser supports websocket!");websocket = new WebSocket("ws://localhost:8998/push");websocket.onopen = function() {console.log("established connection with push server.");}websocket.onmessage = function(ev) {var response = ev.data;console.log("receives push message from netty server: " + response);}}}</script></body>
</html>

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.mzph.cn/news/898150.shtml

如若内容造成侵权/违法违规/事实不符，请联系多彩编程网进行投诉反馈email:809451989@qq.com，一经查实，立即删除！

相关文章

人工智能助力家庭机器人：从清洁到陪伴的智能转型

人工智能助力家庭机器人：从清洁到陪伴的智能转型

引言&#xff1a;家庭机器人进入智能时代 过去&#xff0c;家庭机器人只是简单的“工具”&#xff0c;主要用于扫地、拖地、擦窗等单一任务。然而&#xff0c;随着人工智能&#xff08;AI&#xff09;技术的迅猛发展&#xff0c;家庭机器人正经历从“机械助手”向“智能管家”甚…
阅读更多...
Flume详解——介绍、部署与使用

Flume详解——介绍、部署与使用

1. Flume 简介 Apache Flume 是一个专门用于高效地 收集、聚合、传输 大量日志数据的 分布式、可靠 的系统。它特别擅长将数据从各种数据源&#xff08;如日志文件、消息队列等&#xff09;传输到 HDFS、HBase、Kafka 等大数据存储系统。 特点&#xff1a; 可扩展&#xff1…
阅读更多...
Spring源码解析

Spring源码解析

第一讲 容器接口 BeanFactory和ApplicationContext接口的具体继承关系&#xff1a; ApplicationContext 间接继承了BeanFactory BeanFactory是父接口ApplicationContext是子接口&#xff0c;里面一些功能调用了BeanFactory BeanFactory的功能 表面上只有 getBean&#xff0…
阅读更多...
Django Rest Framework 创建纯净版Django项目部署DRF

Django Rest Framework 创建纯净版Django项目部署DRF

描述创建纯净版的Django项目和 Django Rest Framework 环境的部署 一、创建Django项目 1. 环境说明 操作系统 Windows11python版本 3.9.13Django版本 V4.2.202. 操作步骤（在Pycharm中操作） 创建Python项目drfStudy、虚拟环境 ​虚拟环境中安装 jdangopip install django==4.…
阅读更多...
图解AUTOSAR_CP_NetworkManagementInterface

图解AUTOSAR_CP_NetworkManagementInterface

AUTOSAR 网络管理接口(Nm)详解 AUTOSAR 网络管理接口规范与实现指南 目录 1. 概述 1.1. 网络管理接口的作用1.2. 网络管理接口的特点 2. 网络管理接口架构 2.1. 架构概览2.2. 模块交互关系 3. 网络管理状态机 3.1. 状态定义3.2. 状态转换 4. 协调算法 4.1. 协调关闭流程4.2. 同…
阅读更多...
java学习总结（八）：Spring boot

java学习总结（八）：Spring boot

一、SpringBoot简介 传统Spring开发缺点&#xff1a; 1、导入依赖繁琐 2、项目配置繁琐 Spring Boot是全新框架(更像是一个工具&#xff0c; 脚手架)&#xff0c;是Spring提供的一个子项目&#xff0c; 用于快速构建Spring应用程序。 随着Spring 3.0的发布&#xff0c;Spring 团…
阅读更多...
openEuler24.03 LTS下安装MySQL8

openEuler24.03 LTS下安装MySQL8

前提条件 拥有openEuler24.03 LTS环境&#xff0c;可参考&#xff1a;Vmware下安装openEuler24.03 LTS 步骤 卸载原有mysql及mariadb sudo systemctl stop mysql mysqld 2>/dev/null sudo rpm -qa | grep -i mysql\|mariadb | xargs -n1 sudo rpm -e --nodeps 2>/dev/…
阅读更多...
【失败了】LazyGraphRAG利用本地ollama提供Embedding model服务和火山引擎的deepseek API构建本地知识库

【失败了】LazyGraphRAG利用本地ollama提供Embedding model服务和火山引擎的deepseek API构建本地知识库

LazyGraphRAG测试结果如下 数据&#xff1a; curl https://www.gutenberg.org/cache/epub/24022/pg24022.txt -o ./ragtest/input/book.txt 失败了 气死我也&#xff01;&#xff01;&#xff01;对deepseek-V3也不是很友好啊&#xff0c;我没钱prompt 微调啊&#xff0c;晕死…
阅读更多...
ccfcsp3402矩阵重塑（其二）

ccfcsp3402矩阵重塑（其二）

//矩阵重塑&#xff08;其二&#xff09; #include<iostream> using namespace std; int main(){int n,m,t;cin>>n>>m>>t;int c[10000][10000];int s0,sum0;int d[10000],k[100000];for(int i0;i<n;i){for(int j0;j<m;j){cin>>c[i][j];d[s…
阅读更多...
Unity Shader - UI Sprite Shader之简单抠图效果

Unity Shader - UI Sprite Shader之简单抠图效果

Sprite抠图效果&#xff1a; 前言 在PhotoShop中我们经常会用到抠图操作&#xff0c;现在就用Shader实现一个简单的抠图效果。 实现原理&#xff1a; 使用当前像素颜色与需要抠掉的颜色相减作比较&#xff0c;然后与一个指定的阈值比较以决定是否将其显示出来&#xff1b; U…
阅读更多...
【Mac】安装 Parallels Desktop、Windows、Rocky Linux

【Mac】安装 Parallels Desktop、Windows、Rocky Linux

一、安装PD 理论上&#xff0c;PD只支持试用15天&#xff01;当然&#xff0c;你懂的。 第一步&#xff0c;在 Parallels Desktop for Mac 官网 下载 Install Parallels Desktop.dmg第二步&#xff0c;双击 Install Parallels Desktop.dmg 第三步&#xff0c;双击安装Paralle…
阅读更多...
学习单片机需要多长时间才能进行简单的项目开发？

学习单片机需要多长时间才能进行简单的项目开发？

之前有老铁问我&#xff0c;学单片机到底要多久&#xff0c;才能进行简单的项目开发&#xff1f;是三个月速成&#xff0c;还是三年磨一剑&#xff1f; 今天咱们就来聊聊这个话题&#xff0c;我不是什么高高在上的专家&#xff0c;就是个踩过无数坑、烧过几块板子的“技术老友”…
阅读更多...
centos操作系统上传和下载百度网盘内容

centos操作系统上传和下载百度网盘内容

探序基因 整理 进入百度网盘官网百度网盘 客户端下载 下载linux的rpm格式的安装包 在linux命令行中输入&#xff1a;rpm -ivh baidunetdisk_4.17.7_x86_64.rpm 出现报错&#xff1a; 错误&#xff1a;依赖检测失败&#xff1a; libXScrnSaver 被 baidunetdisk-4.17.7-1.x8…
阅读更多...
蓝牙系统的核心组成解析

蓝牙系统的核心组成解析

一、硬件层&#xff1a;看得见的物理载体 1. 射频模块&#xff08;Radio Frequency Module&#xff09; 专业描述&#xff1a;工作在2.4GHz ISM频段&#xff0c;支持GFSK/π/4 DQPSK/8DPSK调制方式 功能类比&#xff1a;相当于人的"嘴巴"和"耳朵" 发射端…
阅读更多...
go的gmp

go的gmp

参考链接&#xff1a;https://www.bilibili.com/video/BV19r4y1w7Nx Golang的GMP调度模型(协程调度器)是其并发编程的核心。GMP代表Goroutine、Machine和Processor三个关键组成部分。Goroutine是Go语言中的轻量级线程&#xff0c;Machine是操作系统的线程&#xff0c;Processor…
阅读更多...
Vue3-高级特性

Vue3-高级特性

一、Vue中自定义指令 1.认识自定义指令 在Vue的模板语法中我们学习过各种各样的指令&#xff1a;v-show、v-for、v-model等等&#xff0c;除了使用这些指令之外&#xff0c;Vue也允许我们来 自定义自己的指令。 注意&#xff1a;在Vue中&#xff0c;代码的复用和抽象主要还是…
阅读更多...
基于CPLD电力/轨道交通3U机箱开关量输出板（DO）

基于CPLD电力/轨道交通3U机箱开关量输出板（DO）

板卡简介&#xff1a; 本板为开关量输出板&#xff08;DO&#xff09;&#xff0c;采用固态继电器用于电平输出或负载驱动&#xff0c;典型输出高电平为DC110V&#xff0c;低电平为0V。 性能规格&#xff1a; 电源&#xff1a;DC5V&#xff0c;DC3.3V&#xff0c;DC15V&#…
阅读更多...
【C++经典例题】反转字符串中单词的字符顺序：两种实现方法详解

【C++经典例题】反转字符串中单词的字符顺序：两种实现方法详解

&#x1f493; 博客主页&#xff1a;倔强的石头的CSDN主页 &#x1f4dd;Gitee主页&#xff1a;倔强的石头的gitee主页 ⏩ 文章专栏&#xff1a;C经典例题 期待您的关注 目录 问题描述 基于快慢指针的解法 基于索引的解法 两种方法的比较 问题描述 在处理字符串相关的问题…
阅读更多...
Java基础语法练习45（网络编程）

Java基础语法练习45（网络编程）

目录 一、网络的相关概念 1.网络通信 2.网络 3.ip 地址 4.ipv4 地址分类 5.域名 6.网络通信协议 7.TCP 和 UDP 二、InetAddress类 1.相关方法 2.代码示例如下&#xff1a; 三、Socket 1.基本介绍 四、TCP 网络通信编程 1.基本介绍 2.应用示例&#xff1a; 2.1…
阅读更多...
【Json—RPC框架】：宏定义不受命名空间限制，续行符的错误使用造成的bug

【Json—RPC框架】：宏定义不受命名空间限制，续行符的错误使用造成的bug

为什么不受命名空间的限制&#xff1f; 宏处理在预处理阶段&#xff0c; 预处理在编译之前&#xff0c;编译才进行语法分析&#xff0c;语义分析。命名空间也只能限制这部分。 在Json-RPC框架的实现中&#xff0c;遇到如下问题。一开始以为是在实现日志宏的时候&#xff0c;有…
阅读更多...
推荐文章
最新文章

Copyright @ 2022~2023