RedisTemplate使用
RedisTemplate中定义了对5种数据结构操作
redisTemplate.opsForValue();//操作字符串 redisTemplate.opsForHash();//操作hash redisTemplate.opsForList();//操作list redisTemplate.opsForSet();//操作set redisTemplate.opsForZSet();//操作有序set
StringRedisTemplate与RedisTemplate
StringRedisTemplate继承RedisTemplate,StringRedisTemplate
就相当于RedisTemplate<String, String>
的实现
RedisTemplate配置:
@Bean public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) { Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(Object.class); ObjectMapper om = new ObjectMapper(); om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); jackson2JsonRedisSerializer.setObjectMapper(om); RedisTemplate<String, Object> template = new RedisTemplate<String, Object>(); template.setConnectionFactory(redisConnectionFactory); template.setKeySerializer(jackson2JsonRedisSerializer); template.setValueSerializer(jackson2JsonRedisSerializer); template.setHashKeySerializer(jackson2JsonRedisSerializer); template.setHashValueSerializer(jackson2JsonRedisSerializer); template.afterPropertiesSet(); return template; }
如果使用RedisTemplate需要更改序列化方式
RedisSerializer<String> stringSerializer = new StringRedisSerializer(); template.setKeySerializer(stringSerializer ); template.setValueSerializer(stringSerializer ); template.setHashKeySerializer(stringSerializer ); template.setHashValueSerializer(stringSerializer );
ValueOperations可以对String数据结构进行操作
- set void set(K key, V value);
使用:redisTemplate.opsForValue().set("name","tom");
结果:redisTemplate.opsForValue().get("name") 输出结果为tom
- set void set(K key, V value, long timeout, TimeUnit unit);
使用:redisTemplate.opsForValue().set("name","tom",10, TimeUnit.SECONDS);
结果:redisTemplate.opsForValue().get("name")由于设置的是10秒失效,十秒之内查询有结果,十秒之后返回为null
- set void set(K key, V value, long offset);
该方法是用 value 参数覆写(overwrite)给定 key 所储存的字符串值,从偏移量 offset 开始
使用:template.opsForValue().set("key","hello world"); template.opsForValue().set("key","redis", 6); System.out.println("***************"+template.opsForValue().get("key")); 结果:***************hello redis
参考:https://www.jianshu.com/p/7bf5dc61ca06