SpringBoot+Redis编写一个抢红包雨的案例。附源码。

案例演示

SpringBoot+Redis编写一个抢红包雨的案例。附源码

1、案例分析，整体方案介绍

预备上线一个红包雨活动。这个红包雨的思路是活动开始前25分钟，在后台创建活动。然后前端用户进入，到点后将设置的金额拆分成多个小红包，开启倒计时，下红包雨，用户在结束前可以抢多个，结束后弹出抢到的总金额。

分析 100%高并发业务要求，不能用mysql来做，，你需要有记录，比如100块钱，被拆分成10个红包发出去，总计有10个红包，抢一个少一个，总数显示(10/6)直到完，需要记录那些人抢到了红包，

2、红包雨流程问题。

3、搭建SpringBoot环境

好了，现在开干。先搭建一个springBoot+websocket+redis的环境。（依赖看图）测试下正常写入redis数据。连接进websocket.空工程下载地址：https://download.csdn.net/download/ldy889/88560527

增加SpringUtils 解决了webSocket不能访问redis问题：https://download.csdn.net/download/ldy889/88560601

添加yaml文件

server:port: 8080spring:datasource:url: jdbc:mysql://127.0.0.1:3306/jeecg-boot?characterEncoding=UTF-8&useUnicode=true&useSSL=false&tinyInt1isBit=false&allowPublicKeyRetrieval=true&serverTimezone=Asia/Shanghaiusername: rootpassword: root123driver-class-name: com.mysql.cj.jdbc.Driverredis:database: 0host: 127.0.0.1port: 6379password: ''

pom

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>3.1.5</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.example</groupId><artifactId>demo</artifactId><version>0.0.1-SNAPSHOT</version><name>demo</name><description>Demo project for Spring Boot</description><properties><java.version>17</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-jdbc</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis-reactive</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-websocket</artifactId></dependency><dependency><groupId>com.mysql</groupId><artifactId>mysql-connector-j</artifactId><scope>runtime</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>io.projectreactor</groupId><artifactId>reactor-test</artifactId><scope>test</scope></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><image><builder>paketobuildpacks/builder-jammy-base:latest</builder></image><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin></plugins></build></project>