springboot中使用redis的方法代码详解

# docker-compose.yml
version: "2"
services:
 redis:
 container_name: redis
 image: redis:3.2.10
 ports:
  - "6379:6379"

<dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-data-redis</artifactId>
 <exclusions>
  <exclusion>
   <groupId>io.lettuce</groupId>
   <artifactId>lettuce-core</artifactId>
  </exclusion>
 </exclusions>
</dependency>

<dependency>
 <groupId>org.apache.commons</groupId>
 <artifactId>commons-pool2</artifactId>
</dependency>

<dependency>
 <groupId>redis.clients</groupId>
 <artifactId>jedis</artifactId>
</dependency>

server:
 port: 8081
 servlet:
 context-path: /sso
spring:
 application:
 name: SSO
 cache:
 type: redis
 redis:
 database: 0
 host: 192.168.226.5
 port: 6379
 # 有密码填密码，没有密码不填
 password:
 # 连接超时时间（ms)
 timeout: 1000ms
 # 高版本springboot中使用jedis或者lettuce
 jedis:
  pool:
  # 连接池最大连接数（负值表示无限制）
  max-active: 8
  # 连接池最大阻塞等待时间（负值无限制)
  max-wait: 5000ms
  # 最大空闲链接数
  max-idle: 8
  # 最小空闲链接数
  min-idle: 0

@EnableCaching//开启缓存
@Configuration
public class RedisConfig extends CachingConfigurerSupport {
 /**
  * 设置缓存管理器，这里可以配置默认过期时间等
  *
  * @param connectionFactory 连接池
  * @return
  */
 @Bean
 public CacheManager cacheManager(RedisConnectionFactory connectionFactory) {
  RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration
    .defaultCacheConfig()
    .entryTtl(Duration.ofSeconds(60));
  //注意：请勿使用先new 配置对象，然后在调用entryTtl方法的方式来操作
  //会导致配置不生效，原因是调用.entryTtl方法会返回一个新的配置对象，而不是在原来的配置对象上修改

  RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(connectionFactory);
  RedisCacheManager manager = new RedisCacheManager(redisCacheWriter, redisCacheConfiguration);
  return manager;
 }
 @SuppressWarnings("all")
 @Bean
 public RedisTemplate<String, String> redisTemplate(JedisConnectionFactory factory) {
  StringRedisTemplate template = new StringRedisTemplate(factory);
  Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
  ObjectMapper om = new ObjectMapper();
  om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
  om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
  jackson2JsonRedisSerializer.setObjectMapper(om);
  RedisSerializer stringSerializer = new StringRedisSerializer();
  template.setKeySerializer(stringSerializer);
  template.setValueSerializer(jackson2JsonRedisSerializer);
  template.setHashKeySerializer(stringSerializer);
  template.setHashValueSerializer(jackson2JsonRedisSerializer);
  template.afterPropertiesSet();
  return template;
 }

 //使用jedis连接池建立jedis连接工厂
 @Bean
 public JedisConnectionFactory jedisConnectionFactory() {
  logger.info("jedisConnectionFactory:初始化了");
  JedisPoolConfig config = new JedisPoolConfig();
  config.setMaxIdle(maxIdle);
  config.setMinIdle(minIdle);
  config.setMaxWaitMillis(maxWaitMillis);
  config.setMaxTotal(maxActive);
  //链接耗尽时是否阻塞，默认true
  config.setBlockWhenExhausted(true);
  //是否启用pool的jmx管理功能，默认true
  config.setJmxEnabled(true);
  JedisConnectionFactory factory = new JedisConnectionFactory();
  factory.setPoolConfig(config);
  factory.setHostName(host);
  factory.setPort(port);
  factory.setPassword(password);
  factory.setDatabase(database);
  factory.setTimeout(timeout);
  return factory;
 }
}

@CacheConfig(cacheNames = "redis_test")
@Service
public class RedisService {
 //....
}

 /**
  * 缓存时间，首次查询后会缓存结果,key中的值可使用表达式计算.
  * 如不提供key，将使用默认key构造方法生成一个key
  * @return long
  */
 @Cacheable(key = "'currentTime'")
 public long getTime() {
  return System.currentTimeMillis();
 }

/**
  * 一般用于更新查插入操作，每次都会请求db
  */
 @CachePut(key = "'currentTime'+#id")
 public long updateTime(String id) {
  return System.currentTimeMillis();
 }

 @CacheEvict(key = "'currentTime'+#id",allEntries=false)
 public void deleteTime(String id) {
 }

//value属性为key指定前缀
 @Caching(put = {@CachePut(value = "user", key = "'name_'+#user.name"),
   @CachePut(value = "user", key = "'pass_'+#user.password")})
 public User testCaching(User user) {
  return user;
 }