Spring Boot微服务开发实例——项目开发-促销活动微服务项目！

程序员高级码农.

于 2025-06-19 20:55:42 发布

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促销活动微服务项目

新建促销活动微服务项目microservice-promotion。新项目结构如图11.3所示。

（1）microservice-promotion的配置与promotion基本相同，application.yml文件的配置如下：

server:

port: 8081

spring:

application:

name: microservice-promotion

（2）启动类
MicroservicePromotionApplication的代码如下：

package com.example.microservice.promotion;

import org.springframework.boot.SpringApplication;

import

org.springframework.boot.autoconfigure.SpringBootApplication;

import

org.springframework.boot.autoconfigure.data.redis.RedisAuto

Configuration;

import

org.springframework.cloud.client.discovery.EnableDiscovery

Client;

import

org.springframework.context.annotation.EnableAspectJAutoProxy

;

@SpringBootApplication(exclude =

{RedisAutoConfiguration.class})

@EnableAspectJAutoProxy

//开启切面

@EnableDiscoveryClient

//开启服务发现

public class MicroservicePromotionApplication {

public static void main(String[] args) {

SpringApplication.run(MicroservicePromotionApplication.class,

args);

}

}

（3）
PromotionPushController.class接口类的代码如下：

package com.example.microservice.promotion.controller;

import

org.springframework.beans.factory.annotation.Autowired;

import org.springframework.web.bind.annotation.GetMapping;

import

org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import

org.springframework.web.bind.annotation.RestController;

import com.alibaba.csp.sentinel.EntryType;

import com.alibaba.csp.sentinel.annotation.SentinelResource;

import com.example.microservice.promotion.constants.Constant;

import

com.example.microservice.promotion.constants.JsonObject

Response;

import

com.example.microservice.promotion.model.PromotionEntity;

import

com.example.microservice.promotion.service.BlockHandler

Service;

import

com.example.microservice.promotion.service.FallBackService;

import

com.example.microservice.promotion.service.PromotionPush

Service;

import lombok.extern.slf4j.Slf4j;

//促销活动微服务接口

@Slf4j

@RestController

@RequestMapping("/api")

public class PromotionPushController {

@Autowired

private PromotionPushService promotionPushService;

//促销活动投放接口，路径：/api/pushPromotion?id=xx

@GetMapping("pushPromotion")

@ResponseBody

@SentinelResource(value = "pushPromotion", entryType

= EntryType.IN,

blockHandler = "promotionPushBlockHandle", blockHandlerClass

=

{BlockHandlerService.class}, defaultFallback = "fallback",

fallback

Class = {FallBackService.class})

public JsonObjectResponse<PromotionEntity>

pushPromotion(Integer id) {

try {

//调用促销活动投放服务方法

return

promotionPushService.pushPromotion(id);

} catch (Exception e) {

//记录错误日志

log.error("push promotion error!");

return new JsonObjectResponse<>(null,

Constant.ERROR_CODE,

"push promotion error!");

}

}

//领取奖品接口，路径：/api/getPrize?id=xx&device=xx

@GetMapping("getPrize")

@ResponseBody

@SentinelResource(value = "getPrize", entryType =

EntryType.IN,

blockHandler = "prizeBlockHandle", blockHandlerClass =

{BlockHandler

Service.class}, defaultFallback = "fallback", fallbackClass =

{Fall

BackService.class})

public JsonObjectResponse<String> getPrize(Integer

id, String

device) {

try {

//调用领取奖品服务方法

return

promotionPushService.getPrize(id, device);

} catch (Exception e) {

//记录错误日志

log.error("get prize error!");

return new JsonObjectResponse<>(null,

Constant.ERROR_CODE,

"get prize error!");

}

}

}

（4）
PromotionPushService.class服务类的代码如下：

package com.example.microservice.promotion.service;

import java.text.MessageFormat;

import java.util.Map;

import org.apache.commons.collections.MapUtils;

import org.apache.commons.lang.StringUtils;

import

org.springframework.beans.factory.annotation.Autowired;

import

org.springframework.data.redis.core.StringRedisTemplate;

import org.springframework.stereotype.Service;

import com.example.microservice.promotion.constants.Constant;

import

com.example.microservice.promotion.constants.JsonObject

Response;

import

com.example.microservice.promotion.model.PromotionEntity;

import lombok.extern.slf4j.Slf4j;

//促销活动服务类

@Service

@Slf4j

public class PromotionPushService {

@Autowired

private StringRedisTemplate stringRedisTemplate;

public JsonObjectResponse<PromotionEntity>

pushPromotion(Integer id) {

//组装Redis存储促销活动信息的key

String key =

MessageFormat.format(Constant.REDIS_PROMOTION_

KEY, String.valueOf(id));

//Redis操作，用于查询促销活动信息

Map<Object, Object> map =

stringRedisTemplate.opsForHash().

entries(key);

if (MapUtils.isNotEmpty(map)) {

String name = (String)

map.get("name");

String prize = (String)

map.get("prize");

Integer beginTime =

Integer.valueOf((String) map.get

("beginTime"));

Integer endTime =

Integer.valueOf((String) map.get("endTime"));

Integer currentTime = (int)

(System.currentTimeMillis()/

1000);

if (currentTime >= beginTime &&

currentTime <= endTime) {

PromotionEntity

promotionEntity = new PromotionEntity();

promotionEntity.setBeginTime(beginTime);

promotionEntity.setEndTime(endTime);

promotionEntity.setId(id);

promotionEntity.setName(name);

promotionEntity.setPrize(prize);

log.info("push promotion

success");

return new

JsonObjectResponse<>(promotionEntity);

}

}

return new JsonObjectResponse<>(null,

Constant.ERROR_CODE,

"push promotion fail");

}

public JsonObjectResponse<String> getPrize(Integer

id, String

device) {

//组装奖品领取记录存储结构key

String key =

MessageFormat.format(Constant.REDIS_PRIZE_KEY,

String.valueOf(id), device);

//查询该device下的领取记录

String value =

stringRedisTemplate.opsForValue().get(key);

if (StringUtils.isEmpty(value)) { //没有

领取记录，表示领取成功

String promotionKey =

MessageFormat.format(Constant.REDIS_

PROMOTION_KEY, String.valueOf(id));

Map<Object, Object> map =

stringRedisTemplate.opsForHash().

entries(promotionKey);

if (MapUtils.isNotEmpty(map)) {

String prize = (String)

map.get("prize");

stringRedisTemplate.opsForValue().set(key, "1");

log.info("get prize

success");

return new

JsonObjectResponse<>("恭喜你获得:" + prize);

}

}

return new JsonObjectResponse<>(null,

Constant.ERROR_CODE,

"prize is exist");

}

}

（5）限流类BlockHandlerService.class的代码如下：

package com.example.microservice.promotion.service;

import com.example.microservice.promotion.constants.Constant;

import

com.example.microservice.promotion.constants.JsonObject

Response;

import

com.example.microservice.promotion.model.PromotionEntity;

//限流类

public final class BlockHandlerService {

public static JsonObjectResponse<PromotionEntity>

promotionPush

BlockHandle(Integer id) {

return new JsonObjectResponse<>(null,

Constant.ERROR_CODE,

"pushPromotion blcok");

}

public static JsonObjectResponse<String>

prizeBlockHandle(Integer id,

String device) {

return new JsonObjectResponse<>(null,

Constant.ERROR_CODE,

"getprize blcok");

}

}