Spring boot+redis实现消息发布与订阅的代码实例
作者：袖梨
2022-06-29
本篇文章小编给大家分享一下Spring boot+redis实现消息发布与订阅的代码实例，文章代码介绍的很详细，小编觉得挺不错的，现在分享给大家供大家参考，有需要的小伙伴们可以来看看。
一．创建spring boot项目
org.springframework.boot spring-boot-starter-data-redis org.springframework.boot spring-boot-starter-web com.alibaba fastjson 1.2.41
二．编辑yml配置文件
server: port: 7888 # 日志配置 logging: config: classpath:log/logback.xml level: cn.com.dhcc: info org.springframework: info org.springframework.web: info com.alibaba.nacos.client.naming: error spring: redis: host: localhost port: 6379 password: ********* database: 1 jedis: pool: max-idle: 8 max-active: 8 max-wait: -1 min-idle: 0 timeout: 5000
三．配置Redis
@Configuration
public class RedisConfiguration {
/**
* 实例化 RedisTemplate 对象
*
* @return
*/
@Bean("RedisTemplateS")
public RedisTemplate functionDomainRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
RedisTemplate redisTemplate = new RedisTemplate<>();
initDomainRedisTemplate(redisTemplate, redisConnectionFactory);
return redisTemplate;
}
/**
* 设置数据存入 redis 的序列化方式,并开启事务
*
* @param redisTemplate
* @param factory
*/
private void initDomainRedisTemplate(@Qualifier("RedisTemplateS") RedisTemplate redisTemplate, RedisConnectionFactory factory) {
// 如果不配置Serializer，那么存储的时候缺省使用String，如果用User类型存储，那么会提示错误User can't cast to
// String！
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setHashKeySerializer(new StringRedisSerializer());
FastJsonRedisSerializer
四．编写RedisUtil消息发布方法
public class RedisUtils {
private static final Logger log = LoggerFactory.getLogger(RedisUtils.class);
private RedisTemplate redisTemplate;
public void setRedisTemplate(RedisTemplate redisTemplate) {
this.redisTemplate = redisTemplate;
}
public void publish(String channal ,Object obj) {
redisTemplate.convertAndSend(channal,obj );
}
}
五．配置消息监听
@Configuration
public class RedisMessageListener {
/**
* 创建连接工厂
* @param connectionFactory
* @param listenerAdapter
* @return
*/
@Bean
public RedisMessageListenerContainer container(RedisConnectionFactory connectionFactory,
MessageListenerAdapter listenerAdapter,MessageListenerAdapter listenerAdapter2){
RedisMessageListenerContainer container = new RedisMessageListenerContainer();
container.setConnectionFactory(connectionFactory);
//接受消息的key
container.addMessageListener(listenerAdapter,new PatternTopic("phone"));
return container;
}
/**
* 绑定消息监听者和接收监听的方法
* @param receiver
* @return
*/
@Bean
public MessageListenerAdapter listenerAdapter(ReceiverRedisMessage receiver){
return new MessageListenerAdapter(receiver,"receiveMessage");
}
/**
* 注册订阅者
* @param latch
* @return
*/
@Bean
ReceiverRedisMessage receiver(CountDownLatch latch) {
return new ReceiverRedisMessage(latch);
}
/**
* 计数器，用来控制线程
* @return
*/
@Bean
public CountDownLatch latch(){
return new CountDownLatch(1);//指定了计数的次数 1
}
}
六．消息订阅方法
public class ReceiverRedisMessage {
private static final Logger log = LoggerFactory.getLogger(ReceiverRedisMessage.class);
private CountDownLatch latch;
@Autowired
public ReceiverRedisMessage(CountDownLatch latch) {
this.latch = latch;
}
/**
* 队列消息接收方法
*
* @param jsonMsg
*/
public void receiveMessage(String jsonMsg) {
log.info("[开始消费REDIS消息队列phone数据...]");
try {
log.info("监听者收到消息：{}", jsonMsg);
JSONObject exJson = JSONObject.parseObject(jsonMsg);
User user = JSON.toJavaObject(exJson, User.class);
System.out.println("转化为对象 ："+user);
log.info("[消费REDIS消息队列phone数据成功.]");
} catch (Exception e) {
log.error("[消费REDIS消息队列phone数据失败，失败信息:{}]", e.getMessage());
}
latch.countDown();
}
}
七．定时消息发布测试
@EnableScheduling
@Component
public class PublisherController {
private static final Logger log = LoggerFactory.getLogger(PublisherController.class);
@Autowired
private RedisUtils redisUtils;
@Scheduled(fixedRate = 5000)
public String pubMsg() {
User user=new User(1, "尚***", 26,"男","陕西省xxxx市xxxxxx县");
redisUtils.publish("phone", user);
log.info("Publisher sendes Topic... ");
return "success";
}
}
八．测试结果
九．发布对象User实体
public class User implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
private int id;
private String name;
private int age;
private String sex;
private String address;
.....................
} 
