本文整理了Java中redis.clients.jedis.Jedis.decr()方法的一些代码示例，展示了Jedis.decr()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.decr()方法的具体详情如下：
包路径：redis.clients.jedis.Jedis
类名称：Jedis
方法名：decr

Jedis.decr介绍

[英]Decrement the number stored at key by one. If the key does not exist or contains a value of a wrong type, set the key to the value of "0" before to perform the decrement operation.

INCR commands are limited to 64 bit signed integers.

Note: this is actually a string operation, that is, in Redis there are not "integer" types. Simply the string stored at the key is parsed as a base 10 64 bit signed integer, incremented, and then converted back as a string.

Time complexity: O(1)
[中]将键上存储的数字减少一。如果键不存在或包含错误类型的值，请在执行递减操作之前将键设置为值“0”。
INCR命令限制为64位有符号整数。
注意：这实际上是一个字符串操作，也就是说，在Redis中没有“整数”类型。只需将存储在密钥处的字符串解析为一个以10为基数的64位有符号整数，递增，然后转换回字符串即可。
时间复杂度：O（1）

代码示例

代码示例来源：origin: sohutv/cachecloud

@Override
 public Long execute(Jedis connection) {
  return connection.decr(key);
 }
}.run(key);

代码示例来源：origin: sohutv/cachecloud

@Override
 public Long execute(Jedis connection) {
  return connection.decr(key);
 }
}.runBinary(key);

代码示例来源：origin: yu199195/hmily

@Override
public Long decr(final String key) {
  try (Jedis jedis = jedisPool.getResource()) {
    return jedis.decr(key);
  }
}

代码示例来源：origin: yu199195/Raincat

@Override
public Long decr(final String key) {
  try (Jedis jedis = jedisPool.getResource()) {
    return jedis.decr(key);
  }
}

代码示例来源：origin: yu199195/myth

@Override
public Long decr(final String key) {
  try (Jedis jedis = jedisPool.getResource()) {
    return jedis.decr(key);
  }
}

代码示例来源：origin: sohutv/cachecloud

@Override
public Long decr(byte[] key) {
 Jedis j = getShard(key);
 return j.decr(key);
}

代码示例来源：origin: sohutv/cachecloud

@Override
public Long decr(String key) {
 Jedis j = getShard(key);
 return j.decr(key);
}

代码示例来源：origin: yu199195/hmily

@Override
public Long decr(final String key) {
  try (Jedis jedis = jedisSentinelPool.getResource()) {
    return jedis.decr(key);
  }
}

代码示例来源：origin: yu199195/myth

@Override
public Long decr(final String key) {
  try (Jedis jedis = jedisSentinelPool.getResource()) {
    return jedis.decr(key);
  }
}

代码示例来源：origin: yu199195/Raincat

@Override
public Long decr(final String key) {
  try (Jedis jedis = jedisSentinelPool.getResource()) {
    return jedis.decr(key);
  }
}

代码示例来源：origin: shuzheng/zheng

/**
 * decr
 * @param key
 * @return value
 */
public synchronized static Long decr(String key) {
  Jedis jedis = getJedis();
  if (null == jedis) {
    return null;
  }
  long value = jedis.decr(key);
  jedis.close();
  return value;
}

代码示例来源：origin: qiurunze123/miaosha

/**
 * 减少值
 * */
public <T> Long decr(KeyPrefix prefix, String key) {
   Jedis jedis = null;
   try {
     jedis =  jedisPool.getResource();
    //生成真正的key
     String realKey  = prefix.getPrefix() + key;
    return  jedis.decr(realKey);
   }finally {
     returnToPool(jedis);
   }
}

代码示例来源：origin: Netflix/conductor

@Override
public Long decr(String key) {
 Jedis jedis = null;
  try {
   jedis = jedisPool.getResource();
   return jedis.decr(key);
  } finally {
   if (jedis != null)
    jedis.close();
  }
}

代码示例来源：origin: jfinal/jfinal

/**
 * 将 key 中储存的数字值减一。
 * 如果 key 不存在，那么 key 的值会先被初始化为 0 ，然后再执行 DECR 操作。
 * 如果值包含错误的类型，或字符串类型的值不能表示为数字，那么返回一个错误。
 * 本操作的值限制在 64 位(bit)有符号数字表示之内。
 * 关于递增(increment) / 递减(decrement)操作的更多信息，请参见 INCR 命令。
 */
public Long decr(Object key) {
  Jedis jedis = getJedis();
  try {
    return jedis.decr(keyToBytes(key));
  }
  finally {close(jedis);}
}

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

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

代码示例来源：origin: apache/ignite

try (Jedis jedis = pool.getResource()) {
  Assert.assertEquals(1, (long)jedis.incr("newKeyIncr"));
  Assert.assertEquals(-1, (long)jedis.decr("newKeyDecr"));
  Assert.assertEquals(9L, (long)jedis.decr("decrKey1"));
    jedis.decr("nonInt");
    jedis.decr("outOfRangeDecr1");
    jedis.decr("outOfRangeDecr2");

代码示例来源：origin: jwpttcg66/NettyGameServer

/**
 * 返回是否成功
 * @param key
 * @return
 */
public boolean decr(String key){
  Jedis jedis = null;
  boolean sucess = true;
  long result = -1;
  try {
    jedis = jedisPool.getResource();
    jedis.decr(key);
  } catch (Exception e) {
    sucess = false;
    returnBrokenResource(jedis, "decr:"+key, e);
  } finally {
    if (sucess && jedis != null) {
      returnResource(jedis);
    }
  }
  return sucess;
}

代码示例来源：origin: apache/servicemix-bundles

@Override
 public Long execute(Jedis connection) {
  return connection.decr(key);
 }
}.runBinary(key);

代码示例来源：origin: com.netflix.spinnaker.kork/kork-jedis

@Override
public Long decr(byte[] key) {
 String command = "decr";
 return instrumented(command, () -> delegated.decr(key));
}

代码示例来源：origin: com.netflix.conductor/conductor-redis-persistence

@Override
public Long decr(String key) {
 Jedis jedis = null;
  try {
   jedis = jedisPool.getResource();
   return jedis.decr(key);
  } finally {
   if (jedis != null)
    jedis.close();
  }
}