StringRedisTemplate如何使用redis zcard方法？

Question

如何在以下程序中正确使用StringRedisTemplate方法？

public void put(StringRedisTemplate template, final Object key, final Object value ) {
    template.execute(new RedisCallback<Object>() {
        public Object doInRedis(RedisConnection connection) throws DataAccessException {
             connection.zCard((byte[]) key);

             connection.exec();
             return null;
        }

     }
    );
}

Answer 1

您可以zCard(key) RedisConnection以这样的方式致电Long zCard = template.execute(new RedisCallback<Long>() { @Override public Long doInRedis(RedisConnection connection) throws DataAccessException { return connection.zCard(potentiallyExtractBytes(key)); } private byte[] potentiallyExtractBytes(Object key) { return (key instanceof byte[]) ? (byte[]) key : key.toString().getBytes(); } }); ：

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