本文整理了Java中java.util.Properties.containsKey()方法的一些代码示例，展示了Properties.containsKey()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。Properties.containsKey()方法的具体详情如下：
包路径：java.util.Properties
类名称：Properties
方法名：containsKey

Properties.containsKey介绍

暂无

代码示例

代码示例来源：origin: ReactiveX/RxJava

void load(Properties properties) {
    if (properties.containsKey(PURGE_ENABLED_KEY)) {
      purgeEnable = Boolean.parseBoolean(properties.getProperty(PURGE_ENABLED_KEY));
    } else {
      purgeEnable = true;
    }
    if (purgeEnable && properties.containsKey(PURGE_PERIOD_SECONDS_KEY)) {
      try {
        purgePeriod = Integer.parseInt(properties.getProperty(PURGE_PERIOD_SECONDS_KEY));
      } catch (NumberFormatException ex) {
        purgePeriod = 1;
      }
    } else {
      purgePeriod = 1;
    }
  }
}

代码示例来源：origin: apache/incubator-druid

@Override
 public void checkProperties(Properties properties)
 {
  if (!properties.containsKey("log4j.shutdownCallbackRegistry")) {
   properties.setProperty("log4j.shutdownCallbackRegistry", "org.apache.druid.common.config.Log4jShutdown");
  }
  if (!properties.containsKey("log4j.shutdownHookEnabled")) {
   properties.setProperty("log4j.shutdownHookEnabled", "true");
  }
 }
}

代码示例来源：origin: alibaba/druid

public String getProperties() {
  Properties properties = new Properties();
  properties.putAll(connectProperties);
  if (properties.containsKey("password")) {
    properties.put("password", "******");
  }
  return properties.toString();
}

代码示例来源：origin: apache/geode

public static Properties getCredentials(Properties securityProps) {
  Properties credentials = null;
  if (securityProps.containsKey(USER_NAME) && securityProps.containsKey(PASSWORD)) {
   credentials = new Properties();
   credentials.setProperty(USER_NAME, securityProps.getProperty(USER_NAME));
   credentials.setProperty(PASSWORD, securityProps.getProperty(PASSWORD));
  }
  return credentials;
 }
}

代码示例来源：origin: netty/netty

Properties props = new Properties();
try {
  Enumeration<URL> resources = classLoader.getResources("META-INF/io.netty.versions.properties");
  if (!props.containsKey(artifactId + PROP_VERSION) ||
    !props.containsKey(artifactId + PROP_BUILD_DATE) ||
    !props.containsKey(artifactId + PROP_COMMIT_DATE) ||
    !props.containsKey(artifactId + PROP_SHORT_COMMIT_HASH) ||
    !props.containsKey(artifactId + PROP_LONG_COMMIT_HASH) ||
    !props.containsKey(artifactId + PROP_REPO_STATUS)) {
    continue;
      new Version(
          artifactId,
          props.getProperty(artifactId + PROP_VERSION),
          parseIso8601(props.getProperty(artifactId + PROP_BUILD_DATE)),
          parseIso8601(props.getProperty(artifactId + PROP_COMMIT_DATE)),
          props.getProperty(artifactId + PROP_SHORT_COMMIT_HASH),
          props.getProperty(artifactId + PROP_LONG_COMMIT_HASH),

代码示例来源：origin: stanfordnlp/CoreNLP

public static Properties noClobberWriteProperties(Properties bp, Properties ovp) {
 for (String propertyName : ovp.stringPropertyNames()) {
  if (bp.containsKey(propertyName))
   continue;
  bp.setProperty(propertyName,ovp.getProperty(propertyName));
 }
 return bp;
}

代码示例来源：origin: confluentinc/ksql

@SuppressWarnings("OptionalUsedAsFieldOrParameterType")
 private static Properties loadProperties(final Optional<String> propertiesFile) {
  final Properties properties = new Properties();
  if (!propertiesFile.isPresent()) {
   return properties;
  }

  try (InputStream input = new FileInputStream(propertiesFile.get())) {
   properties.load(input);
   if (properties.containsKey(KsqlConfig.KSQL_SERVICE_ID_CONFIG)) {
    properties.put(
      StreamsConfig.APPLICATION_ID_CONFIG,
      properties.getProperty(KsqlConfig.KSQL_SERVICE_ID_CONFIG)
    );
   }
   return properties;
  } catch (final IOException e) {
   throw new KsqlException("failed to load properties file: " + propertiesFile.get(), e);
  }
 }
}

代码示例来源：origin: voldemort/voldemort

/**
   * Store all properties, those local and also those in parent props
   *
   * @param out
   *            The stream to write to
   * @throws IOException
   *             If there is an error writing
   */
  public void storeFlattened(OutputStream out) throws IOException {
    Properties p = new Properties();
    for (String key : keySet()) {
      if (!p.containsKey(key)) {
        p.setProperty(key, get(key));
      }
    }

    p.store(out, null);
  }
}

代码示例来源：origin: gocd/gocd

private Properties mailProperties() {
  Properties props = new Properties();
  props.put("mail.from", from);
  if (!System.getProperties().containsKey("mail.smtp.connectiontimeout")) {
    props.put("mail.smtp.connectiontimeout", DEFAULT_TIMEOUT);
  }
  if (!System.getProperties().containsKey("mail.smtp.timeout")) {
    props.put("mail.smtp.timeout", DEFAULT_TIMEOUT);
  }
  if (System.getProperties().containsKey("mail.smtp.starttls.enable")) {
    props.put("mail.smtp.starttls.enable", "true");
  }
  String mailProtocol = tls ? "smtps" : "smtp";
  props.put("mail.transport.protocol", mailProtocol);
  return props;
}

代码示例来源：origin: geoserver/geoserver

/**
 * (non-Javadoc)
 *
 * @see org.geoserver.security.GeoServerRoleService#personalizeRoleParams(java.lang.String,
 *     java.util.Properties, java.lang.String, java.util.Properties)
 *     <p>Default implementation: if a user property name equals a role property name, take the
 *     value from to user property and use it for the role property.
 */
public Properties personalizeRoleParams(
    String roleName, Properties roleParams, String userName, Properties userProps)
    throws IOException {
  Properties props = null;
  // this is true if the set is modified --> common
  // property names exist
  props = new Properties();
  boolean personalized = false;
  for (Object key : roleParams.keySet()) {
    if (userProps.containsKey(key)) {
      props.put(key, userProps.get(key));
      personalized = true;
    } else {
      props.put(key, roleParams.get(key));
    }
  }
  return personalized ? props : null;
}

代码示例来源：origin: apache/flink

Assert.assertEquals("myInput", props.getProperty("input"));
  final String pathToFile = tmp.newFile().getAbsolutePath();
  parameter.createPropertiesFile(pathToFile);
  final Properties defaultProps = new Properties();
  try (FileInputStream fis = new FileInputStream(pathToFile)) {
    defaultProps.load(fis);
  Assert.assertEquals("myDefaultValue", defaultProps.get("output"));
  Assert.assertEquals("-1", defaultProps.get("expectedCount"));
  Assert.assertTrue(defaultProps.containsKey("input"));

代码示例来源：origin: apache/incubator-gobblin

public State(State otherState) {
 this.commonProperties = otherState.getCommonProperties();
 this.specProperties = new Properties();
 this.specProperties.putAll(otherState.getProperties());
 for (Object key : this.commonProperties.keySet()) {
  if (this.specProperties.containsKey(key) && this.commonProperties.get(key).equals(this.specProperties.get(key))) {
   this.specProperties.remove(key);
  }
 }
}

代码示例来源：origin: protostuff/protostuff

static Properties putIncludes(Properties props)
{
  String includes = props.getProperty("includes");
  if (includes == null)
    return props;
  for (String include : COMMA.split(includes))
  {
    final Properties p;
    try
    {
      p = propsFrom(include.trim());
    }
    catch (IOException e)
    {
      throw new RuntimeException(e);
    }
    for (Object key : p.keySet())
    {
      if (!props.containsKey(key))
        props.put(key, p.get(key));
    }
  }
  return props;
}

代码示例来源：origin: apache/usergrid

@Override
public String getProperty(String name) {
  String propertyValue;
  if (orgPropertyNameValid(name)) {
    if (orgProperties.containsKey(name)) {
      // return from org-specific properties
      propertyValue = orgProperties.get(name);
    } else if (properties.containsKey(name)) {
      // return from properties file
      propertyValue = (String)properties.get(name);
    } else {
      // return the default
      propertyValue = defaultProperties.get(name);
    }
  } else {
    // not an org config item, return from properties
    propertyValue = properties.getProperty(name);
  }
  return !isBlank(propertyValue) ? propertyValue : null;
}

代码示例来源：origin: stanfordnlp/CoreNLP

public static void main(String[] args) throws Exception {
 Properties props;
 if (args.length > 0) {
  props = StringUtils.argsToProperties(args);
 } else {
  props = new Properties();
 }
 if ( ! props.containsKey("dcoref.conll2011")) {
  log.info("-dcoref.conll2011 [input_CoNLL_corpus]: was not specified");
  return;
 }
 if ( ! props.containsKey("singleton.predictor.output")) {
  log.info("-singleton.predictor.output [output_model_file]: was not specified");
  return;
 }
 GeneralDataset<String, String> data = SingletonPredictor.generateFeatureVectors(props);
 LogisticClassifier<String, String> classifier = SingletonPredictor.train(data);
 SingletonPredictor.saveToSerialized(classifier, getPathSingletonPredictor(props));
}

代码示例来源：origin: apache/incubator-gobblin

/**
 * Remove a property if it exists.
 *
 * @param key property key
 */
public void removeProp(String key) {
 this.specProperties.remove(key);
 if (this.commonProperties.containsKey(key)) {
  // This case should not happen.
  Properties commonPropsCopy = new Properties();
  commonPropsCopy.putAll(this.commonProperties);
  commonPropsCopy.remove(key);
  this.commonProperties = commonPropsCopy;
 }
}

代码示例来源：origin: apache/nifi

/**
 * Creates an instance of this class as well as the instance of the
 * corresponding Kafka {@link KafkaProducer} using provided Kafka
 * configuration properties.
 *
 * @param kafkaProperties
 *            instance of {@link Properties} used to bootstrap
 *            {@link KafkaProducer}
 */
KafkaPublisher(Properties kafkaProperties, int ackCheckSize, ComponentLog componentLog) {
  kafkaProperties.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, ByteArraySerializer.class.getName());
  kafkaProperties.put(ProducerConfig.KEY_SERIALIZER_CLASS_CONFIG, ByteArraySerializer.class.getName());
  this.kafkaProducer = new KafkaProducer<>(kafkaProperties);
  this.ackCheckSize = ackCheckSize;
  try {
    if (kafkaProperties.containsKey("partitioner.class")) {
      this.partitioner = (Partitioner) Class.forName(kafkaProperties.getProperty("partitioner.class")).newInstance();
    } else {
      this.partitioner = null;
    }
  } catch (Exception e) {
    throw new IllegalStateException("Failed to create partitioner", e);
  }
  this.componentLog = componentLog;
}

代码示例来源：origin: apache/rocketmq

private void mergeIfExist(Properties from, Properties to) {
  for (Object key : from.keySet()) {
    if (!to.containsKey(key)) {
      continue;
    }
    Object fromObj = from.get(key), toObj = to.get(key);
    if (toObj != null && !toObj.equals(fromObj)) {
      log.info("Replace, key: {}, value: {} -> {}", key, toObj, fromObj);
    }
    to.put(key, fromObj);
  }
}

代码示例来源：origin: apache/geode

/**
 * Appends the log-file property to the Properties object if set of properties does not already
 * define the log-file property or the gemfire.agent.log-file property.
 * <p/>
 *
 * @param props the <code>Properties</code> to append the log-file property to if the property
 *        does not exist.
 */
private static void appendLogFileProperty(final Properties props) {
 if (!(props.containsKey(DistributedSystemConfig.LOG_FILE_NAME)
   || props.containsKey(SYSTEM_PROPERTY_PREFIX + DistributedSystemConfig.LOG_FILE_NAME))) {
  props.put(DistributedSystemConfig.LOG_FILE_NAME, DEFAULT_LOG_FILE);
 }
}

代码示例来源：origin: apache/storm

@Override
  public IRichBolt getConsumer() {
    Preconditions.checkArgument(!props.isEmpty(),
        "Writable Kafka table " + topic + " must contain producer config");
    HashMap<String, Object> producerConfig = (HashMap<String, Object>) props.get(CONFIG_KEY_PRODUCER);
    props.putAll(producerConfig);
    Preconditions.checkState(!props.containsKey(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG),
        "Writable Kafka table " + topic + " must not contain \"bootstrap.servers\" config, set it in the kafka URL instead");
    Preconditions.checkState(!props.containsKey(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG),
      "Writable Kafka table " + topic + "must not contain " + ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG
        + ", it will be hardcoded to be " + ByteBufferSerializer.class);
    props.put(ProducerConfig.VALUE_SERIALIZER_CLASS_CONFIG, ByteBufferSerializer.class);
    props.put(ProducerConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
    TupleToKafkaMapper<Object, ByteBuffer> mapper = new SqlKafkaMapper(serializer);
    return new KafkaBolt<Object, ByteBuffer>()
        .withTopicSelector(new DefaultTopicSelector(topic))
        .withProducerProperties(props)
        .withTupleToKafkaMapper(mapper);
  }
}