Spring Data Redis入門示例：字符串操做（六）

Spring Data Redis對字符串的操做，封裝在了ValueOperations和BoundValueOperations中，在集成好了SPD以後，在須要的地方引入：

// 注入模板操做實例
@Autowired
private RedisTemplate template;

// 從模板中取出對應的操做類實例
@Resource(name = "redisTemplate")
private ValueOperations valueOps;

因爲存儲在Redis中的鍵和值一般是java.lang.String，所以Redis模塊爲RedisConnection和RedisTemplate提供了兩個擴展，分別是StringRedisConnection（及其DefaultStringRedisConnection實現）和StringRedisTemplate(至關於RedisTemplate<String, String>)。

org.springframework.data.redis.core.StringRedisTemplate源碼以下：

public class StringRedisTemplate extends RedisTemplate<String, String> {

/**
 * Constructs a new <code>StringRedisTemplate</code> instance. {@link #setConnectionFactory(RedisConnectionFactory)}
 * and {@link #afterPropertiesSet()} still need to be called.
 */
public StringRedisTemplate() {
    RedisSerializer<String> stringSerializer = new StringRedisSerializer();
    setKeySerializer(stringSerializer);
    setValueSerializer(stringSerializer);
    setHashKeySerializer(stringSerializer);
    setHashValueSerializer(stringSerializer);
}

/**
 * Constructs a new <code>StringRedisTemplate</code> instance ready to be used.
 * 
 * @param connectionFactory connection factory for creating new connections
 */
public StringRedisTemplate(RedisConnectionFactory connectionFactory) {
    this();
    setConnectionFactory(connectionFactory);
    afterPropertiesSet();
}

protected RedisConnection preProcessConnection(RedisConnection connection, boolean existingConnection) {
    return new DefaultStringRedisConnection(connection);
}
}

實際就是繼承自RedisTemplate<String, String>而且對應的序列化器是StringRedisSerializer。