feat
This commit is contained in:
@@ -22,8 +22,8 @@ export const routers = [
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items: [
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{ text: 'Spring IOC简介', link: '/Web/SpringBoot/Spring-IOC' },
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{ text: 'Spring AOP简介', link: '/Web/SpringBoot/Spring-AOP' },
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{ text: 'SpringBoot启动流程', link: '/Web/SpringBoot/SpringBoot-Start-Process' },
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{ text: 'Spring MVC简介', link: '/Web/SpringBoot/Spring-MVC' },
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{ text: 'SpringBoot启动流程', link: '/Web/SpringBoot/SpringBoot-Start-Process' },
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{ text: 'SpringBoot Starter原理', link: '/Web/SpringBoot/SpringBoot-Starter' },
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{ text: 'SpringBoot Bean简介', link: '/Web/SpringBoot/SpringBoot-Bean' },
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{ text: 'SpringBoot注解', link: '/Web/SpringBoot/SpringBoot-Annotation' },
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@@ -31,6 +31,7 @@ export const routers = [
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{ text: 'SpringBoot技巧', link: '/Web/SpringBoot/SpringBoot-Skills' },
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{ text: 'SpringBoot RestClient简介', link: '/Web/SpringBoot/SpringBoot-RestClient' },
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{ text: 'SpringBoot Redis简介和使用', link: '/Web/SpringBoot/SpringBoot-Redis' },
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{ text: 'SpringBoot WebSocket使用', link: '/Web/SpringBoot/SpringBoot-WebSocket' },
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{ text: 'SpringBoot 线程与事件', link: '/Web/SpringBoot/SpringBoot-Thread' }
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]
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},
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@@ -23,6 +23,7 @@
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| 返回通知（AfterReturning） | 目标方法正常返回后执行 |
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| 异常通知（AfterThrowing） | 目标方法抛出异常后执行 |
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| 环绕通知（Around） | 包裹目标方法执行，可自定义目标方法执行前后的逻辑（功能最强） |
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  [AOP API](https://docs.springjava.cn/spring-framework/reference/core/aop-api.html)
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# 二、原理
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  Spring AOP 基于动态代理实现，分为两种方式：
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@@ -5,6 +5,7 @@
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# 一、IOC
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  Spring框架的核心是IOC（控制反转）容器，它负责管理应用程序中的对象（称为Bean）的创建、配置和组装。
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  [IoC 容器](https://docs.springjava.cn/spring-framework/reference/core/beans.html)
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# 二、Bean
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## 2.1 定义
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@@ -5,6 +5,7 @@
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# 一、基础概念
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  Spring MVC（Spring Model-View-Controller）是 Spring Framework 中的一部分，它是一个基于 **请求驱动** 的 Web 框架，主要用于构建 Web 应用程序，并且遵循 MVC（模型-视图-控制器） 设计模式。它将 Web 应用的业务逻辑、用户界面和请求处理分离，使得代码更加模块化和可维护。
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  [Spring Web MVC](https://docs.springjava.cn/spring-framework/reference/web/webmvc.html)
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# 二、具体流程
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154
docs/Web/SpringBoot/SpringBoot-WebSocket.md
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154
docs/Web/SpringBoot/SpringBoot-WebSocket.md
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@@ -0,0 +1,154 @@
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---
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title: SpringBoot WebSocket使用
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date: 2026-06-08
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---
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# 一、简介
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  [WebSocket API](https://docs.springjava.cn/spring-framework/reference/web/websocket/server.html)
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# 二、安装
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```xml
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<dependency>
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<groupId>org.springframework.boot</groupId>
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<artifactId>spring-boot-starter-websocket</artifactId>
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</dependency>
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```
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# 三、使用
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## 3.1 定义WebSocketHandler
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```java
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@Component
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public class GenericWebSocketHandler extends TextWebSocketHandler {
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private static final Map<String, WebSocketSession> SESSION_MAP =
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new ConcurrentHashMap<>();
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@Override
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public void afterConnectionEstablished(WebSocketSession session) {
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String userId = getUserId(session);
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SESSION_MAP.put(userId, session);
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log("用户连接成功：" + userId);
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}
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@Override
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public void afterConnectionClosed(WebSocketSession session, CloseStatus status) {
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String userId = getUserId(session);
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SESSION_MAP.remove(userId);
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log("用户断开连接：" + userId);
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}
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@Override
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protected void handleTextMessage(WebSocketSession session, TextMessage message) throws IOException {
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String payload = message.getPayload();
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// 心跳处理
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if ("PING".equalsIgnoreCase(payload)) {
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session.sendMessage(new TextMessage("PONG"));
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return;
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}
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// 普通消息（可按 JSON 协议扩展）
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log("收到消息：" + payload);
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session.sendMessage(new TextMessage("服务端已收到：" + payload));
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}
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@Override
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public void handleTransportError(WebSocketSession session, Throwable exception) {
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log("传输异常：" + exception.getMessage());
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}
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/** 从 session 中获取用户标识（握手阶段放入） */
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private String getUserId(WebSocketSession session) {
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return (String) session.getAttributes().getOrDefault("userId", session.getId());
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}
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/** 单发 */
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public void sendToUser(String userId, String msg) throws IOException {
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WebSocketSession session = SESSION_MAP.get(userId);
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if (session != null && session.isOpen()) {
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session.sendMessage(new TextMessage(msg));
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}
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}
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/** 广播 */
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public void broadcast(String msg) throws IOException {
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for (WebSocketSession session : SESSION_MAP.values()) {
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if (session.isOpen()) {
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session.sendMessage(new TextMessage(msg));
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}
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}
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}
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/** 在线人数 */
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public int onlineCount() {
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return SESSION_MAP.size();
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}
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}
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```
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## 3.2 定义HandshakeInterceptor
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```java
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@Component
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public class GenericHandshakeInterceptor implements HandshakeInterceptor {
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/**
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* 握手前执行
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*/
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@Override
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public boolean beforeHandshake(
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ServerHttpRequest request,
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ServerHttpResponse response,
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WebSocketHandler wsHandler,
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Map<String, Object> attributes) {
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// 从请求中URL中获取id
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// 例如：ws://localhost:8080/ws?userId=123，多个参数用&连接
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String userId = servletRequest.getServletRequest().getParameter("userId");
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if (userId == null) {
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// 返回 false → 握手失败 → 连接被拒绝
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return false;
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}
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// 放入 attributes 中，方便下次获取
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attributes.put("userId", userId);
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return true;
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}
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/**
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* 握手完成后执行（一般不用写）
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*/
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@Override
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public void afterHandshake(
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ServerHttpRequest request,
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ServerHttpResponse response,
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WebSocketHandler wsHandler,
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Exception exception) {
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}
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}
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```
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## 3.3 配置WebSocketConfigurer
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```java
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@Configuration
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@EnableWebSocket
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public class WebSocketConfig implements WebSocketConfigurer {
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@Resource
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private GenericWebSocketHandler genericWebSocketHandler;
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@Resource
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private GenericHandshakeInterceptor genericHandshakeInterceptor;
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@Override
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public void registerWebSocketHandlers(WebSocketHandlerRegistry registry) {
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registry.addHandler(genericWebSocketHandler, "/ws")
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.addInterceptors(genericHandshakeInterceptor)
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.setAllowedOrigins("*");
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}
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}
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```
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  WebSocket连接地址：ip:port/ws?userId=123。
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# 四、前端使用
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  参考：[useWebSocket](../Vue/VueUse.md)
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