redis.clients.jedis.Jedis.lrange()方法的使用及代码示例

x33g5p2x  于2022-01-21 转载在 其他  
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本文整理了Java中redis.clients.jedis.Jedis.lrange()方法的一些代码示例，展示了Jedis.lrange()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Jedis.lrange()方法的具体详情如下：
包路径：redis.clients.jedis.Jedis
类名称：Jedis
方法名：lrange

Jedis.lrange介绍

[英]Return the specified elements of the list stored at the specified key. Start and end are zero-based indexes. 0 is the first element of the list (the list head), 1 the next element and so on.

For example LRANGE foobar 0 2 will return the first three elements of the list.

start and end can also be negative numbers indicating offsets from the end of the list. For example -1 is the last element of the list, -2 the penultimate element and so on.

Consistency with range functions in various programming languages

Note that if you have a list of numbers from 0 to 100, LRANGE 0 10 will return 11 elements, that is, rightmost item is included. This may or may not be consistent with behavior of range-related functions in your programming language of choice (think Ruby's Range.new, Array#slice or Python's range() function).

LRANGE behavior is consistent with one of Tcl.

Out-of-range indexes

Indexes out of range will not produce an error: if start is over the end of the list, or start > end, an empty list is returned. If end is over the end of the list Redis will threat it just like the last element of the list.

Time complexity: O(start+n) (with n being the length of the range and start being the start offset)
[中]返回存储在指定键处的列表的指定元素。开始和结束是基于零的索引。0是列表的第一个元素（列表头），1是下一个元素，依此类推。
例如，LRANGE foobar 0 2将返回列表的前三个元素。
“开始”和“结束”也可以是负数，表示从列表末尾开始的偏移。例如，-1是列表的最后一个元素，-2是倒数第二个元素，依此类推。
与各种编程语言中的范围函数的一致性
请注意，如果您有一个从0到100的数字列表，LRANGE 0 10将返回11个元素，即包括最右边的项。这可能与所选编程语言中与范围相关的函数的行为一致，也可能不一致（想想Ruby的range.new、Array#slice或Python的range（）函数）。
LRANGE行为与Tcl的行为一致。
超出范围索引
超出范围的索引不会产生错误：如果开始在列表末尾，或开始>结束，则返回空列表。如果结束在列表的末尾，Redis将像列表的最后一个元素一样威胁它。
时间复杂度：O（开始+n）（n是范围的长度，开始是开始偏移）

代码示例

代码示例来源：origin: sohutv/cachecloud

@Override
 public List<byte[]> execute(Jedis connection) {
  return connection.lrange(key, start, end);
 }
}.runBinary(key);

代码示例来源：origin: sohutv/cachecloud

@Override
 public List<String> execute(Jedis connection) {
  return connection.lrange(key, start, end);
 }
}.run(key);

代码示例来源：origin: sohutv/cachecloud

public List<byte[]> execute(Jedis connection) {
    return connection.lrange(keyByte, start, end);
  }
}.runBinary(keyByte);

代码示例来源：origin: sohutv/cachecloud

@Override
public List<byte[]> lrange(byte[] key, long start, long end) {
 Jedis j = getShard(key);
 return j.lrange(key, start, end);
}

代码示例来源：origin: sohutv/cachecloud

@Override
public List<String> lrange(String key, long start, long end) {
 Jedis j = getShard(key);
 return j.lrange(key, start, end);
}

代码示例来源：origin: caoxinyu/RedisClient

@Override
protected void command() {
  jedis.select(db);
  page = jedis.lrange(key, start, end);
}

代码示例来源：origin: caoxinyu/RedisClient

@Override
protected void command() {
  jedis.select(db);
  values = jedis.lrange(key, 0, -1);
}

代码示例来源：origin: Netflix/conductor

@Override
public List<String> lrange(String key, long start, long end) {
 Jedis jedis = null;
  try {
   jedis = jedisPool.getResource();
   return jedis.lrange(key, start, end);
  } finally {
   if (jedis != null)
    jedis.close();
  }
}

代码示例来源：origin: shuzheng/zheng

/**
 * 获取会话列表
 * @param offset
 * @param limit
 * @return
 */
public Map getActiveSessions(int offset, int limit) {
  Map sessions = new HashMap();
  Jedis jedis = RedisUtil.getJedis();
  // 获取在线会话总数
  long total = jedis.llen(ZHENG_UPMS_SERVER_SESSION_IDS);
  // 获取当前页会话详情
  List<String> ids = jedis.lrange(ZHENG_UPMS_SERVER_SESSION_IDS, offset, (offset + limit - 1));
  List<Session> rows = new ArrayList<>();
  for (String id : ids) {
    String session = RedisUtil.get(ZHENG_UPMS_SHIRO_SESSION_ID + "_" + id);
    // 过滤redis过期session
    if (null == session) {
      RedisUtil.lrem(ZHENG_UPMS_SERVER_SESSION_IDS, 1, id);
      total = total - 1;
      continue;
    }
     rows.add(SerializableUtil.deserialize(session));
  }
  jedis.close();
  sessions.put("total", total);
  sessions.put("rows", rows);
  return sessions;
}

代码示例来源：origin: jfinal/jfinal

/**
 * 返回列表 key 中指定区间内的元素，区间以偏移量 start 和 stop 指定。
 * 下标(index)参数 start 和 stop 都以 0 为底，也就是说，以 0 表示列表的第一个元素，以 1 表示列表的第二个元素，以此类推。
 * 你也可以使用负数下标，以 -1 表示列表的最后一个元素， -2 表示列表的倒数第二个元素，以此类推。
 * <pre>
 * 例子：
 * 获取 list 中所有数据：cache.lrange(listKey, 0, -1);
 * 获取 list 中下标 1 到 3 的数据： cache.lrange(listKey, 1, 3);
 * </pre>
 */
@SuppressWarnings("rawtypes")
public List lrange(Object key, long start, long end) {
  Jedis jedis = getJedis();
  try {
    List<byte[]> data = jedis.lrange(keyToBytes(key), start, end);
    if (data != null) {
      return valueListFromBytesList(data);
    } else {
      return new ArrayList<byte[]>(0);
    }
  }
  finally {close(jedis);}
}

代码示例来源：origin: spring-projects/spring-data-redis

@Override
public List<byte[]> lRange(byte[] key, long start, long end) {
  Assert.notNull(key, "Key must not be null!");
  try {
    if (isPipelined()) {
      pipeline(connection.newJedisResult(connection.getRequiredPipeline().lrange(key, start, end)));
      return null;
    }
    if (isQueueing()) {
      transaction(connection.newJedisResult(connection.getRequiredTransaction().lrange(key, start, end)));
      return null;
    }
    return connection.getJedis().lrange(key, start, end);
  } catch (Exception ex) {
    throw convertJedisAccessException(ex);
  }
}

代码示例来源：origin: jwpttcg66/NettyGameServer

public List<String> lrange(String key, int start, int stop) {
  Jedis jedis = null;
  boolean sucess = true;
  List<String> ret;
  try {
    jedis = jedisPool.getResource();
    ret = jedis.lrange(key, start, stop);
    return ret;
  } catch (Exception e) {
    sucess = false;
    returnBrokenResource(jedis, "lrange", e);
    return null;
  } finally {
    if (sucess && jedis != null) {
      returnResource(jedis);
    }
  }
}

代码示例来源：origin: spinnaker/kayenta

List<String> pendingUpdatesJsonList = jedis.lrange(pendingUpdatesKey, 0, -1);

代码示例来源：origin: spinnaker/kayenta

List<String> updatesThroughCheckpoint = jedis.lrange(pendingUpdatesKey, 0, -1);
StorageService configurationService =
 storageServiceRepository

代码示例来源：origin: com.wso2telco.core/pcr-service

@Override
public List<String> getApplicationIdList(String sectorId) throws PCRException {
  List<String> applicationIds = new ArrayList<String>();
  Jedis jedis = RedisUtil.getInstance().getResource();
  List<String> appidlist = jedis.lrange(sectorId, 0, -1);
  for (String appinfo : appidlist) {
    applicationIds.add(appinfo.split(":")[0]);
  }
  jedis.close();
  return applicationIds;
}

代码示例来源：origin: OpenNMS/opennms

@Override
public List<String> getResourceIdsWithPrefix(Context context, String resourceIdPrefix) {
  try (Jedis jedis = m_pool.getResource()) {
    final List<String> elements = Lists.newArrayList(SEARCH_PREFIX, context.getId());
    elements.addAll(m_resourceIdSplitter.splitIdIntoElements(resourceIdPrefix));
    return jedis.lrange(m_resourceIdSplitter.joinElementsToId(elements).getBytes(), 0, -1).stream()
        .map(bytes -> resourceId(METADATA_PREFIX, context.getId(), bytes))
        .collect(Collectors.toList());
  }
}

代码示例来源：origin: org.nuxeo.ecm.core/nuxeo-core-redis

protected List<String> listWorkIdsList(final byte[] queueBytes) throws IOException {
  return Framework.getService(RedisExecutor.class).execute(jedis -> {
    List<byte[]> keys = jedis.lrange(queueBytes, 0, -1);
    List<String> list = new ArrayList<>(keys.size());
    for (byte[] workIdBytes : keys) {
      list.add(string(workIdBytes));
    }
    return list;
  });
}

代码示例来源：origin: lordofthejars/nosql-unit

private static void checkListValues(RedisConnectionCallback redisConnectionCallback, JSONObject expectedListObject) throws Error {
  JSONArray expectedValuesArray = (JSONArray) expectedListObject.get(VALUES_TOKEN);
  List<byte[]> expectedListValues = extractListOfValues(expectedValuesArray);
  Object expectedKey = expectedListObject.get(KEY_TOKEN);
  byte[] key = toByteArray(expectedKey);
  Jedis jedis = redisConnectionCallback.getActiveJedis(key);
  
  checkType(jedis, expectedKey, key, "list");
  List<byte[]> elements = jedis.lrange(key, 0, -1);
  checkListSize(expectedListValues.size(), expectedKey, elements.size());
  checkValueInList(expectedListValues, expectedKey, elements);
}

代码示例来源：origin: xetorthio/johm

public List<String> lrange(int start, int end) {
  Jedis jedis = getResource();
  List<String> lrange = jedis.lrange(key(), start, end);
  returnResource(jedis);
  return lrange;
}

代码示例来源：origin: gresrun/jesque

protected KeyInfo handleList(final Jedis jedis) {
  final KeyInfo keyInfo = new KeyInfo(this.key, KeyType.LIST);
  keyInfo.setSize(jedis.llen(this.key));
  if (this.doArrayValue) {
    keyInfo.setArrayValue(jedis.lrange(this.key, this.offset, this.offset + this.count));
  }
  return keyInfo;
}

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