Java项目实战--基于SpringBoot3.0开发仿12306高并发售票系统--前置知识

这个问题看起来像是在询问如何使用Spring Boot开发一个类似12306的高并发售票系统。由于这个问题涉及的内容较多，我将提供一个概览和一些关键点，但不会提供完整的代码。

1. 技术选型：Spring Boot + MySQL + Redis
2. 核心功能：用户登录、票务信息查询、购票流程、秒杀/抢票逻辑
3. 高并发设计：限流、排队、分布式锁、数据一致性
4. 安全性考虑：防止超卖、重复购买、恶意请求

关键代码和配置示例：

pom.xml中添加依赖：

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
    </dependency>
    <dependency>
        <groupId>org.mybatis.spring.boot</groupId>
        <artifactId>mybatis-spring-boot-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
</dependencies>

application.properties中数据库和Redis配置：

spring.datasource.url=jdbc:mysql://localhost:3306/database
spring.datasource.username=root
spring.datasource.password=yourpassword
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
 
spring.redis.host=localhost
spring.redis.port=6379

实体类Ticket：

@Entity
public class Ticket {
    @Id
    private Long id;
    private Integer count;
    // 省略getter和setter
}

Redis分布式锁实现：

@Service
public class RedisLockService {
    @Autowired
    private StringRedisTemplate redisTemplate;
 
    public boolean lock(String key) {
        return redisTemplate.opsForValue().setIfAbsent(key, "lock", 10, TimeUnit.SECONDS);
    }
 
    public void unlock(String key) {
        redisTemplate.delete(key);
    }
}

MyBatis Mapper接口：

public interface TicketMapper {
    Ticket selectTicketById(Long id);
    int updateTicketCount(Ticket ticket);
}

服务层代码：

@Service
public class TicketService {
    @Autowired
    private TicketMapper ticketMapper;
    @Autowired
    private RedisLockService redisLockService;
 
    public TicketDTO buyTicket(Long ticketId) {
        String lockKey = "ticket:" + ticketId;
        if (redisLockService.lock(lockKey)) {
            try {
                Ticket ticket = ticketMapper.selectTicketById(ticketId);