Spring boot+redis实现消息发布与订阅的代码

Redis  /  管理员 发布于 7年前   350

一．创建spring boot项目

<dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-data-redis</artifactId>  </dependency>  <dependency>   <groupId>org.springframework.boot</groupId>   <artifactId>spring-boot-starter-web</artifactId>  </dependency>  <dependency>   <groupId>com.alibaba</groupId>   <artifactId>fastjson</artifactId>   <version>1.2.41</version>  </dependency>

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: errorspring: 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

@Configurationpublic class RedisConfiguration { /**  * 实例化 RedisTemplate 对象  *  * @return  */ @Bean("RedisTemplateS") public RedisTemplate<String, Object> functionDomainRedisTemplate(RedisConnectionFactory redisConnectionFactory) {  RedisTemplate<String, Object> 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<String, Object> 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<Object> fastJsonRedisSerializer = new FastJsonRedisSerializer<Object>(Object.class);  redisTemplate.setHashValueSerializer(fastJsonRedisSerializer);  redisTemplate.setValueSerializer(fastJsonRedisSerializer);  //redisTemplate.setHashValueSerializer(new GenericJackson2JsonRedisSerializer());  //redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());  // 开启事务  redisTemplate.setEnableTransactionSupport(true);  redisTemplate.setConnectionFactory(factory); } /**  * 注入封装RedisTemplate @Title: redisUtil @return RedisUtil @date  *   */ @Bean(name = "redisUtils") public RedisUtils redisUtil(@Qualifier("RedisTemplateS") RedisTemplate<String, Object> redisTemplate) {  RedisUtils redisUtil = new RedisUtils();  redisUtil.setRedisTemplate(redisTemplate);  return redisUtil; }

四．编写RedisUtil消息发布方法

public class RedisUtils { private static final Logger log = LoggerFactory.getLogger(RedisUtils.class); private RedisTemplate<String, Object> redisTemplate; public void setRedisTemplate(RedisTemplate<String, Object> redisTemplate) {  this.redisTemplate = redisTemplate; } public void publish(String channal ,Object obj) {  redisTemplate.convertAndSend(channal,obj ); }}

五．配置消息监听

@Configurationpublic 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@Componentpublic 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;  .....................}

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