#使用idea创建springboot +Redis +RabbitMQ 实现高并发限时秒杀
2020-01-12 20:15
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springboot +Redis +RabbitMQ 实现高并发限时秒杀
1.安装RabbitMQ
安装路径： RabbitMQ安装教程
2.安装Redis +RedisDesktopManager
安装路径：
Redis和RedisDesktopManager安装教程
3.安装 Jmeter测试工具
安装路径：
Jmeter安装教程
1.第一步先新建Springboot项目
2.导jar包
pom.xml
<dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-devtools</artifactId> <scope>runtime</scope> <optional>true</optional> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.8.1</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-amqp</artifactId> </dependency> <dependency> <groupId>io.jsonwebtoken</groupId> <artifactId>jjwt</artifactId> <version>0.7.0</version> </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> <version>2.1.0</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-tx</artifactId> </dependency> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper-spring-boot-starter</artifactId> <version>2.0.3-beta1</version> </dependency> <dependency> <groupId>tk.mybatis</groupId> <artifactId>mapper</artifactId> <version>4.0.0</version> </dependency> </dependencies>
3.配置application.properties
spring.devtools.restart.enabled=false ##配置数据库连接 spring.datasource.username=root spring.datasource.password=root server.port=8443 spring.datasource.url=jdbc:mysql://localhost:3306/ktao?useUnicode=true&characterEncoding=UTF-8&serverTimezone=UTC&allowMultiQueries=true spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver ##配置rabbitmq连接 --先打开服务，不然会报错 spring.rabbitmq.host=localhost spring.rabbitmq.port=5672 spring.rabbitmq.username=guest spring.rabbitmq.password=guest ##配置连接redis --先打开服务，不然会报错 spring.redis.host=localhost spring.redis.port=6379 spring.redis.jedis.pool.max-active=1024 spring.redis.jedis.pool.max-wait=-1s spring.redis.jedis.pool.max-idle=200 spring.redis.password=123456
4.实体类 Order.java
package com.example.springbootxsmsha.pojo;
import lombok.Data;
import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import java.io.Serializable;
@Data
@Table(name = "t_order")
public class Order implements Serializable {
private static final long serialVersionUID = -8867272732777764701L;
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "order_name")
private String order_name;
@Column(name = "order_user")
private String order_user;
}
Stock.java
package com.example.springbootxsmsha.pojo;
import lombok.Data;
import javax.persistence.Column;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Table;
import java.io.Serializable;
@Table(name = "stock")
@Data
public class Stock implements Serializable {
private static final long serialVersionUID = 2451194410162873075L;
@Id
@Column(name = "id")
@GeneratedValue(strategy = GenerationType.IDENTITY)
private Long id;
@Column(name = "name")
private String name;
@Column(name = "stock")
private Long stock;
}
4.Mapper 文件
OrderMapper.java
StockMapper.java如下一样 在此省略
package com.example.springbootxsmsha.mapper;
import com.example.springbootxsmsha.base.service.GenericMapper;
import com.example.springbootxsmsha.pojo.Order;
import org.apache.ibatis.annotations.Mapper;
@Mapper
public interface OrderMapper extends GenericMapper<Order> {
void insertOrder(Order order);
}
5.Service层
package com.example.springbootxsmsha.service;
import com.example.springbootxsmsha.config.MyRabbitMQConfig;
import com.example.springbootxsmsha.pojo.Order;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
@Slf4j
public class MQOrderService {
@Autowired
private OrderService orderService;
/**
* 监听订单消息队列，并消费
*
* @param order
*/
@RabbitListener(queues = MyRabbitMQConfig.ORDER_QUEUE)
public void createOrder(Order order) {
log.info("收到订单消息，订单用户为：{}，商品名称为：{}", order.getOrder_user(), order.getOrder_name());
/**
* 调用数据库orderService创建订单信息
*/
orderService.insertOrder(order);
}
}
package com.example.springbootxsmsha.service;
import com.example.springbootxsmsha.config.MyRabbitMQConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
@Slf4j
public class MQStockService {
@Autowired
private StockService stockService;
/**
* 监听库存消息队列，并消费
* @param stockName
*/
@RabbitListener(queues = MyRabbitMQConfig.STORY_QUEUE)
public void decrByStock(String stockName) {
log.info("库存消息队列收到的消息商品信息是：{}", stockName);
/**
* 调用数据库service给数据库对应商品库存减一
*/
stockService.decrByStock(stockName);
}
}
package com.example.springbootxsmsha.service;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import java.util.Date;
import java.util.concurrent.TimeUnit;
@Service
public class RedisService {
@Autowired
private RedisTemplate<String, Object> redisTemplate;
/**
* 设置String键值对
* @param key
* @param value
* @param millis
*/
public void put(String key, Object value, long millis) {
redisTemplate.opsForValue().set(key, value, millis, TimeUnit.MINUTES);
}
public void putForHash(String objectKey, String hkey, String value) {
redisTemplate.opsForHash().put(objectKey, hkey, value);
}
public <T> T get(String key, Class<T> type) {
return (T) redisTemplate.boundValueOps(key).get();
}
public void remove(String key) {
redisTemplate.delete(key);
}
public boolean expire(String key, long millis) {
return redisTemplate.expire(key, millis, TimeUnit.MILLISECONDS);
}
public boolean persist(String key) {
return redisTemplate.hasKey(key);
}
public String getString(String key) {
return (String) redisTemplate.opsForValue().get(key);
}
public Integer getInteger(String key) {
return (Integer) redisTemplate.opsForValue().get(key);
}
public Long getLong(String key) {
return (Long) redisTemplate.opsForValue().get(key);
}
public Date getDate(String key) {
return (Date) redisTemplate.opsForValue().get(key);
}
/**
* 对指定key的键值减一
* @param key
* @return
*/
public Long decrBy(String key) {
return redisTemplate.opsForValue().decrement(key);
}
}
6.实现类 接口省略
package com.example.springbootxsmsha.service.impl;
import com.example.springbootxsmsha.mapper.OrderMapper;
import com.example.springbootxsmsha.pojo.Order;
import com.example.springbootxsmsha.service.OrderService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
@Service
public class OrderServiceImpl implements OrderService {
@Autowired
private OrderMapper orderMapper;
@Override
public void insertOrder(Order order) {
orderMapper.insert(order);
}
}
package com.example.springbootxsmsha.service.impl;
import com.example.springbootxsmsha.mapper.StockMapper;
import com.example.springbootxsmsha.pojo.Stock;
import com.example.springbootxsmsha.service.StockService;
import tk.mybatis.mapper.entity.Example;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.CollectionUtils;
import java.util.List;
@Service
public class StockServiceImpl implements StockService {
@Autowired
private StockMapper stockMapper;
// 秒杀商品后减少库存
@Override
public void decrByStock(String stockName) {
Example example = new Example(Stock.class);
Example.Criteria criteria = example.createCriteria();
criteria.andEqualTo("name", stockName);
List<Stock> stocks = stockMapper.selectByExample(example);
if (!CollectionUtils.isEmpty(stocks)) {
Stock stock = stocks.get(0);
stock.setStock(stock.getStock() - 1);
stockMapper.updateByPrimaryKey(stock);
}
}
// 秒杀商品前判断是否有库存
@Override
public Integer selectByExample(String stockName) {
Example example = new Example(Stock.class);
Example.Criteria criteria = example.createCriteria();
criteria.andEqualTo("name", stockName);
List<Stock> stocks = stockMapper.selectByExample(example);
if (!CollectionUtils.isEmpty(stocks)) {
return stocks.get(0).getStock().intValue();
}
return 0;
}
}
7.controller层
package com.example.springbootxsmsha.controller;
import com.example.springbootxsmsha.config.MyRabbitMQConfig;
import com.example.springbootxsmsha.pojo.Order;
import com.example.springbootxsmsha.service.OrderService;
import com.example.springbootxsmsha.service.RedisService;
import com.example.springbootxsmsha.service.StockService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
@Slf4j
public class SecController {
@Autowired
private RabbitTemplate rabbitTemplate;
@Autowired
private RedisService redisService;
@Autowired
private OrderService orderService;
@Autowired
private StockService stockService;
/**
* 使用redis+消息队列进行秒杀实现
*
* @param username
* @param stockName
* @return
*/
@PostMapping( value = "/sec",produces = "application/json;charset=utf-8")
@ResponseBody
public String sec(@RequestParam(value = "username") String username, @RequestParam(value = "stockName") String stockName) {
log.info("参加秒杀的用户是：{}，秒杀的商品是：{}", username, stockName);
String message = null;
//调用redis给相应商品库存量减一
Long decrByResult = redisService.decrBy(stockName);
if (decrByResult >= 0) {
/**
* 说明该商品的库存量有剩余，可以进行下订单操作
*/
log.info("用户：{}秒杀该商品：{}库存有余，可以进行下订单操作", username, stockName);
//发消息给库存消息队列，将库存数据减一
rabbitTemplate.convertAndSend(MyRabbitMQConfig.STORY_EXCHANGE, MyRabbitMQConfig.STORY_ROUTING_KEY, stockName);
//发消息给订单消息队列，创建订单
Order order = new Order();
order.setOrder_name(stockName);
order.setOrder_user(username);
rabbitTemplate.convertAndSend(MyRabbitMQConfig.ORDER_EXCHANGE, MyRabbitMQConfig.ORDER_ROUTING_KEY, order);
message = "用户" + username + "秒杀" + stockName + "成功";
} else {
/**
* 说明该商品的库存量没有剩余，直接返回秒杀失败的消息给用户
*/
log.info("用户：{}秒杀时商品的库存量没有剩余,秒杀结束", username);
message = "用户："+ username + "商品的库存量没有剩余,秒杀结束";
}
return message;
}
/**
* 实现纯数据库操作实现秒杀操作
* @param username
* @param stockName
* @return
*/
@RequestMapping("/secDataBase")
@ResponseBody
public String secDataBase(@RequestParam(value = "username") String username, @RequestParam(value = "stockName") String stockName) {
log.info("参加秒杀的用户是：{}，秒杀的商品是：{}", username, stockName);
String message = null;
//查找该商品库存
Integer stockCount = stockService.selectByExample(stockName);
log.info("用户：{}参加秒杀，当前商品库存量是：{}", username, stockCount);
if (stockCount > 0) {
/**
* 还有库存，可以进行继续秒杀，库存减一,下订单
*/
//1、库存减一
stockService.decrByStock(stockName);
//2、下订单
Order order = new Order();
order.setOrder_user(username);
order.setOrder_name(stockName);
orderService.insertOrder(order);
log.info("用户：{}.参加秒杀结果是：成功", username);
message = username + "参加秒杀结果是：成功";
} else {
log.info("用户：{}.参加秒杀结果是：秒杀已经结束", username);
message = username + "参加秒杀活动结果是：秒杀已经结束";
}
return message;
}
}
8.还有两个工具类
package com.example.springbootxsmsha.config;
import org.springframework.amqp.core.Binding;
import org.springframework.amqp.core.BindingBuilder;
import org.springframework.amqp.core.Exchange;
import org.springframework.amqp.core.ExchangeBuilder;
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.core.QueueBuilder;
import org.springframework.amqp.support.converter.Jackson2JsonMessageConverter;
import org.springframework.amqp.support.converter.MessageConverter;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import java.util.HashMap;
import java.util.Map;
@Configuration
public class MyRabbitMQConfig {
//库存交换机
public static final String STORY_EXCHANGE = "STORY_EXCHANGE";
//订单交换机
public static final String ORDER_EXCHANGE = "ORDER_EXCHANGE";
//库存队列
public static final String STORY_QUEUE = "STORY_QUEUE";
//订单队列
public static final String ORDER_QUEUE = "ORDER_QUEUE";
//库存路由键
public static final String STORY_ROUTING_KEY = "STORY_ROUTING_KEY";
//订单路由键
public static final String ORDER_ROUTING_KEY = "ORDER_ROUTING_KEY";
@Bean
public MessageConverter messageConverter() {
return new Jackson2JsonMessageConverter();
}
//创建库存交换机
@Bean
public Exchange getStoryExchange() {
return ExchangeBuilder.directExchange(STORY_EXCHANGE).durable(true).build();
}
//创建库存队列
@Bean
public Queue getStoryQueue() {
return new Queue(STORY_QUEUE);
}
//库存交换机和库存队列绑定
@Bean
public Binding bindStory() {
return BindingBuilder.bind(getStoryQueue()).to(getStoryExchange()).with(STORY_ROUTING_KEY).noargs();
}
//创建订单队列
@Bean
public Queue getOrderQueue() {
return new Queue(ORDER_QUEUE);
}
//创建订单交换机
@Bean
public Exchange getOrderExchange() {
return ExchangeBuilder.directExchange(ORDER_EXCHANGE).durable(true).build();
}
//订单队列与订单交换机进行绑定
@Bean
public Binding bindOrder() {
return BindingBuilder.bind(getOrderQueue()).to(getOrderExchange()).with(ORDER_ROUTING_KEY).noargs();
}
}
package com.example.springbootxsmsha.config;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
@Configuration
public class RedisConfig {
// 配置redis得配置详解
@Bean
public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
template.setConnectionFactory(redisConnectionFactory);
template.setKeySerializer(new StringRedisSerializer());
template.setValueSerializer(new GenericJackson2JsonRedisSerializer());
template.setHashKeySerializer(new GenericJackson2JsonRedisSerializer());
template.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());
template.afterPropertiesSet();
return template;
}
}
- 配置tkmybatis得接口
新建一个base包，在base下面新建service接口
package com.example.springbootxsmsha.base.service;
import tk.mybatis.mapper.common.Mapper;
import tk.mybatis.mapper.common.MySqlMapper;
public interface GenericMapper<T> extends Mapper<T>, MySqlMapper<T> {
}
10.设置启动类
package com.example.springbootxsmsha;
import com.example.springbootxsmsha.service.RedisService;
import org.mybatis.spring.annotation.MapperScan;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.ApplicationArguments;
import org.springframework.boot.ApplicationRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
@MapperScan("com.example.springbootxsmsha.mapper")
public class SpringbootxsmshaApplication implements ApplicationRunner {
public static void main(String[] args) {
SpringApplication.run(SpringbootxsmshaApplication.class, args);
}
@Autowired
private RedisService redisService;
/**
* redis初始化商品的库存量和信息
* @param args
* @throws Exception
*/
@Override
public void run(ApplicationArguments args) throws Exception {
redisService.put("watch", 10, 20);
}
}
最后测试
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