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