SpringBoot3+Vue3 开发高并发秒杀抢购系统-完结
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Spring Boot 是一个简化 Spring 应用快速开发的框架，它可以帮助你轻松地搭建基于 Spring 的应用。Spring Boot 整合 JDBC、Druid 以及 MyBatis 是一个常见的应用场景，这样可以方便地进行数据库访问操作。下面是整合这几个组件的步骤和配置示例。
1. 添加依赖
首先，你需要在 pom.xml 文件中添加必要的依赖项。
<dependencies>
<!-- Spring Boot Starter Data JPA -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<!-- Spring Boot Starter Web -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!-- MyBatis -->
<dependency>
<groupId>org.mybatis.spring.boot</groupId>
<artifactId>mybatis-spring-boot-starter</artifactId>
<version>2.2.1</version>
</dependency>
<!-- Druid 数据库连接池 -->
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>druid-spring-boot-starter</artifactId>
<version>1.2.8</version>
</dependency>
<!-- MySQL Driver -->
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
</dependencies>
2. 配置 application.properties 或 application.yml
接下来，配置数据库连接信息以及 MyBatis 和 Druid 的相关配置。
application.properties 示例
spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
spring.datasource.url=jdbc:mysql://localhost:3306/mydb?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
spring.datasource.username=root
spring.datasource.password=my_password
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
# Druid 配置
spring.datasource.druid.initial-size=5
spring.datasource.druid.min-idle=5
spring.datasource.druid.max-active=20
spring.datasource.druid.max-wait=60000
spring.datasource.druid.time-between-eviction-runs-millis=60000
spring.datasource.druid.min-evictable-idle-time-millis=300000
spring.datasource.druid.test-while-idle=true
spring.datasource.druid.test-on-borrow=false
spring.datasource.druid.test-on-return=false
spring.datasource.druid.pool-prepared-statements=true
spring.datasource.druid.max-pool-prepared-statement-per-connection-size=20
spring.datasource.druid.filters=stat,wall
spring.datasource.druid.connection-properties=druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
# MyBatis 配置
mybatis.type-aliases-package=com.example.demo.entity
mybatis.mapper-locations=classpath:mapper/*.xml
application.yml 示例
spring:
datasource:
type: com.alibaba.druid.pool.DruidDataSource
url: jdbc:mysql://localhost:3306/mydb?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
username: root
password: my_password
driver-class-name: com.mysql.cj.jdbc.Driver
druid:
initial-size: 5
min-idle: 5
max-active: 20
max-wait: 60000
time-between-eviction-runs-millis: 60000
min-evictable-idle-time-millis: 300000
test-while-idle: true
test-on-borrow: false
test-on-return: false
pool-prepared-statements: true
max-pool-prepared-statement-per-connection-size: 20
filters: stat,wall
connection-properties: druid.stat.mergeSql=true;druid.stat.slowSqlMillis=500
mybatis:
type-aliases-package: com.example.demo.entity
mapper-locations: classpath:mapper/*.xml
3. 创建实体类
创建实体类来映射数据库表。
package com.example.demo.entity;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class User {
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
private String name;
private String email;
// Getters and Setters
}
4. 创建 Mapper 接口
创建 MyBatis 的 Mapper 接口来定义 SQL 查询。
package com.example.demo.mapper;
import com.example.demo.entity.User;
import org.apache.ibatis.annotations.Select;
public interface UserMapper {
@Select("SELECT * FROM user WHERE id = #{id}")
User findById(Long id);
}
5. 创建 Service 类
创建 Service 类来调用 Mapper 接口中定义的方法。
package com.example.demo.service;
import com.example.demo.entity.User;
import com.example.demo.mapper.UserMapper;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class UserService {
private final UserMapper userMapper;
@Autowired
public UserService(UserMapper userMapper) {
this.userMapper = userMapper;
}
public User getUserById(Long id) {
return userMapper.findById(id);
}
}
6. 创建 Controller 类
创建 Controller 类来处理 HTTP 请求，并调用 Service 方法。
package com.example.demo.controller;
import com.example.demo.entity.User;
import com.example.demo.service.UserService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class UserController {
private final UserService userService;
@Autowired
public UserController(UserService userService) {
this.userService = userService;
}
@GetMapping("/users/{id}")
public User getUser(@PathVariable Long id) {
return userService.getUserById(id);
}
}
7. 启动类
创建启动类来启动 Spring Boot 应用。
package com.example.demo;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
通过以上步骤，你就可以在 Spring Boot 中整合 JDBC、Druid 以及 MyBatis，实现数据库的操作了。如果你需要进一步的功能或者有特殊需求，可以根据实际情况调整配置和代码。
