弹幕来了！点燃直播间的互动热潮！

下面是一个简单的示例，展示如何使用 Spring Boot 框架实现一个基本的直播弹幕功能。我们将使用 WebSocket 来处理实时通讯，并利用 Redis 来广播弹幕消息。

项目结构

复制代码

live-barrage │ ├── src │ ├── main │ │ ├── java │ │ │ └── com │ │ │ └── example │ │ │ └── livebarrage │ │ │ ├── LiveBarrageApplication.java │ │ │ ├── config │ │ │ │ └── WebSocketConfig.java │ │ │ ├── controller │ │ │ │ └── BarrageController.java │ │ │ └── model │ │ │ └── Message.java │ │ └── resources │ │ ├── application.properties │ │ └── static │ │ └── index.html └── pom.xml

1. 创建 Spring Boot 项目

在 Spring Initializr 创建一个新的项目，选择以下依赖：

• Spring Web
• Spring WebSocket
• Spring Data Redis

2. 配置 pom.xml

确保 pom.xml 文件中包含 Redis 和 WebSocket 相关的依赖：

xml复制代码

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-websocket</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter</artifactId>
    </dependency>
    <!-- 其他依赖 -->
</dependencies>

3. 主应用程序类 LiveBarrageApplication.java

java复制代码

package com.example.livebarrage;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class LiveBarrageApplication {
    public static void main(String[] args) {
        SpringApplication.run(LiveBarrageApplication.class, args);
    }
}

4. WebSocket 配置 WebSocketConfig.java

package com.example.livebarrage.config;

import org.springframework.context.annotation.Configuration;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.EnableWebSocketMessageBroker;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;

@Configuration
@EnableWebSocketMessageBroker
public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {
    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry) {
        registry.addEndpoint("/barrage").setAllowedOrigins("*").withSockJS();
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry config) {
        config.enableSimpleBroker("/topic");
        config.setApplicationDestinationPrefixes("/app");
    }
}

5. 消息模型 Message.java

package com.example.livebarrage.model;

public class Message {
    private String sender;
    private String content;

    // Getters and Setters
    public String getSender() {
        return sender;
    }

    public void setSender(String sender) {
        this.sender = sender;
    }

    public String getContent() {
        return content;
    }

    public void setContent(String content) {
        this.content = content;
    }
}

6. 控制器 BarrageController.java

package com.example.livebarrage.controller;

import com.example.livebarrage.model.Message;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;

@Controller
public class BarrageController {

    @MessageMapping("/send")
    @SendTo("/topic/barrages")
    public Message sendMessage(Message message) {
        return message; // 返回消息对象以便广播
    }
}