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

Properties.propertyNames介绍

[英]Returns all of the property names (keys) in this Properties object.
[中]返回此属性对象中的所有属性名称（键）。

代码示例

代码示例来源：origin: spring-projects/spring-framework

/**
 * Copy the configured output {@link Properties}, if any, into the
 * {@link Transformer#setOutputProperty output property set} of the supplied
 * {@link Transformer}.
 * @param transformer the target transformer
 */
protected final void copyOutputProperties(Transformer transformer) {
  if (this.outputProperties != null) {
    Enumeration<?> en = this.outputProperties.propertyNames();
    while (en.hasMoreElements()) {
      String name = (String) en.nextElement();
      transformer.setOutputProperty(name, this.outputProperties.getProperty(name));
    }
  }
}

代码示例来源：origin: eclipse-vertx/vert.x

private void clearProperties() {
 Set<String> toClear = new HashSet<>();
 Enumeration e = System.getProperties().propertyNames();
 // Uhh, properties suck
 while (e.hasMoreElements()) {
  String propName = (String) e.nextElement();
  if (propName.startsWith("vertx.options")) {
   toClear.add(propName);
  }
 }
 toClear.forEach(System::clearProperty);
}

代码示例来源：origin: javamelody/javamelody

final Map<String, Date> result = new HashMap<String, Date>();
if (versionsFile.exists()) {
  final Properties versionsProperties = new Properties();
  try {
    final InputStream input = new FileInputStream(versionsFile);
        .list(versionsProperties.propertyNames());
    final SimpleDateFormat dateFormat = new SimpleDateFormat(VERSIONS_DATE_PATTERN,
        Locale.US);
    for (final String version : propertyNames) {
      try {
        final Date date = dateFormat.parse(versionsProperties.getProperty(version));
        result.put(version, date);
      } catch (final ParseException e) {
        continue;

代码示例来源：origin: javamelody/javamelody

private static void readCollectorApplications() throws IOException {
  // le fichier applications.properties contient les noms et les urls des applications à monitorer
  // par ex.: recette=http://recette1:8080/myapp
  // ou production=http://prod1:8080/myapp,http://prod2:8080/myapp
  // Dans une instance de Properties, les propriétés ne sont pas ordonnées,
  // mais elles seront ordonnées lorsqu'elles seront mises dans cette TreeMap
  final Map<String, List<URL>> result = new TreeMap<String, List<URL>>();
  final File file = getCollectorApplicationsFile();
  if (file.exists()) {
    final Properties properties = new Properties();
    final FileInputStream input = new FileInputStream(file);
    try {
      properties.load(input);
    } finally {
      input.close();
    }
    @SuppressWarnings("unchecked")
    final List<String> propertyNames = (List<String>) Collections
        .list(properties.propertyNames());
    for (final String property : propertyNames) {
      result.put(property, parseUrl(String.valueOf(properties.get(property))));
    }
  }
  urlsByApplications = result;
}

代码示例来源：origin: stackoverflow.com

public Enumeration<String> getKeys()
  return properties != null ? ((Enumeration<String>) properties.propertyNames()) : null;
protected Object handleGetObject(String key)
  return properties.getProperty(key);
      if (format.equals("db"))
        Properties p = new Properties();
        DataSource ds = (DataSource) ContextFactory.getApplicationContext().getBean("clinicalDataSource");
        Connection con = null;

代码示例来源：origin: stackoverflow.com

Properties props = new OrderedProperties();
props.load(new FileInputStream(args[0]));
for (Enumeration e = props.propertyNames(); e.hasMoreElements();) {
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Set the HTTP status code that this exception resolver will apply for a given
 * resolved error view. Keys are view names; values are status codes.
 * <p>Note that this error code will only get applied in case of a top-level request.
 * It will not be set for an include request, since the HTTP status cannot be modified
 * from within an include.
 * <p>If not specified, the default status code will be applied.
 * @see #setDefaultStatusCode(int)
 */
public void setStatusCodes(Properties statusCodes) {
  for (Enumeration<?> enumeration = statusCodes.propertyNames(); enumeration.hasMoreElements();) {
    String viewName = (String) enumeration.nextElement();
    Integer statusCode = Integer.valueOf(statusCodes.getProperty(viewName));
    this.statusCodes.put(viewName, statusCode);
  }
}

代码示例来源：origin: stackoverflow.com

@SuppressWarnings("unchecked")
public Enumeration<String> getKeys() {
  return properties != null ? (Enumeration<String>) properties.propertyNames() : parent.getKeys();
    String include = properties.getProperty("include");
    if (include != null) {
      for (String includeBaseName : include.split("\\s*,\\s*")) {
    Properties properties = new Properties();
    properties.load(loader.getResourceAsStream(baseName + ".properties"));
    return properties;

代码示例来源：origin: eclipse-vertx/vert.x

private void clearProperties() {
 Set<String> toClear = new HashSet<>();
 Enumeration e = System.getProperties().propertyNames();
 // Uhh, properties suck
 while (e.hasMoreElements()) {
  String propName = (String) e.nextElement();
  if (propName.startsWith("vertx.options")) {
   toClear.add(propName);
  }
 }
 for (String propName : toClear) {
  System.clearProperty(propName);
 }
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Resolve the given interface mappings, turning class names into Class objects.
 * @param mappings the specified interface mappings
 * @return the resolved interface mappings (with Class objects as values)
 */
private Map<String, Class<?>[]> resolveInterfaceMappings(Properties mappings) {
  Map<String, Class<?>[]> resolvedMappings = new HashMap<>(mappings.size());
  for (Enumeration<?> en = mappings.propertyNames(); en.hasMoreElements();) {
    String beanKey = (String) en.nextElement();
    String[] classNames = StringUtils.commaDelimitedListToStringArray(mappings.getProperty(beanKey));
    Class<?>[] classes = resolveClassNames(classNames, beanKey);
    resolvedMappings.put(beanKey, classes);
  }
  return resolvedMappings;
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Merge the given Properties instance into the given Map,
 * copying all properties (key-value pairs) over.
 * <p>Uses {@code Properties.propertyNames()} to even catch
 * default properties linked into the original Properties instance.
 * @param props the Properties instance to merge (may be {@code null})
 * @param map the target Map to merge the properties into
 */
@SuppressWarnings("unchecked")
public static <K, V> void mergePropertiesIntoMap(@Nullable Properties props, Map<K, V> map) {
  if (props != null) {
    for (Enumeration<?> en = props.propertyNames(); en.hasMoreElements();) {
      String key = (String) en.nextElement();
      Object value = props.get(key);
      if (value == null) {
        // Allow for defaults fallback or potentially overridden accessor...
        value = props.getProperty(key);
      }
      map.put((K) key, (V) value);
    }
  }
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Map specific URL paths to specific cache seconds.
 * <p>Overrides the default cache seconds setting of this interceptor.
 * Can specify "-1" to exclude a URL path from default caching.
 * <p>Supports direct matches, e.g. a registered "/test" matches "/test",
 * and a various Ant-style pattern matches, e.g. a registered "/t*" matches
 * both "/test" and "/team". For details, see the AntPathMatcher javadoc.
 * <p><b>NOTE:</b> Path patterns are not supposed to overlap. If a request
 * matches several mappings, it is effectively undefined which one will apply
 * (due to the lack of key ordering in {@code java.util.Properties}).
 * @param cacheMappings a mapping between URL paths (as keys) and
 * cache seconds (as values, need to be integer-parsable)
 * @see #setCacheSeconds
 * @see org.springframework.util.AntPathMatcher
 */
public void setCacheMappings(Properties cacheMappings) {
  this.cacheMappings.clear();
  Enumeration<?> propNames = cacheMappings.propertyNames();
  while (propNames.hasMoreElements()) {
    String path = (String) propNames.nextElement();
    int cacheSeconds = Integer.parseInt(cacheMappings.getProperty(path));
    this.cacheMappings.put(path, cacheSeconds);
  }
}

代码示例来源：origin: google/guava

/**
 * Creates an {@code ImmutableMap<String, String>} from a {@code Properties} instance. Properties
 * normally derive from {@code Map<Object, Object>}, but they typically contain strings, which is
 * awkward. This method lets you get a plain-old-{@code Map} out of a {@code Properties}.
 *
 * @param properties a {@code Properties} object to be converted
 * @return an immutable map containing all the entries in {@code properties}
 * @throws ClassCastException if any key in {@code Properties} is not a {@code String}
 * @throws NullPointerException if any key or value in {@code Properties} is null
 */
@GwtIncompatible // java.util.Properties
public static ImmutableMap<String, String> fromProperties(Properties properties) {
 ImmutableMap.Builder<String, String> builder = ImmutableMap.builder();
 for (Enumeration<?> e = properties.propertyNames(); e.hasMoreElements(); ) {
  String key = (String) e.nextElement();
  builder.put(key, properties.getProperty(key));
 }
 return builder.build();
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Convert the given merged properties, converting property values
 * if necessary. The result will then be processed.
 * <p>The default implementation will invoke {@link #convertPropertyValue}
 * for each property value, replacing the original with the converted value.
 * @param props the Properties to convert
 * @see #processProperties
 */
protected void convertProperties(Properties props) {
  Enumeration<?> propertyNames = props.propertyNames();
  while (propertyNames.hasMoreElements()) {
    String propertyName = (String) propertyNames.nextElement();
    String propertyValue = props.getProperty(propertyName);
    String convertedValue = convertProperty(propertyName, propertyValue);
    if (!ObjectUtils.nullSafeEquals(propertyValue, convertedValue)) {
      props.setProperty(propertyName, convertedValue);
    }
  }
}

代码示例来源：origin: spring-projects/spring-framework

Properties entityReferences = new Properties();
Enumeration<?> keys = entityReferences.propertyNames();
while (keys.hasMoreElements()) {
  String key = (String) keys.nextElement();
  int referredChar = Integer.parseInt(key);
  Assert.isTrue((referredChar < 1000 || (referredChar >= 8000 && referredChar < 10000)),
      () -> "Invalid reference to special HTML entity: " + referredChar);
  int index = (referredChar < 1000 ? referredChar : referredChar - 7000);
  String reference = entityReferences.getProperty(key);
  this.characterToEntityReferenceMap[index] = REFERENCE_START + reference + REFERENCE_END;
  this.entityReferenceToCharacterMap.put(reference, (char) referredChar);

代码示例来源：origin: org.apache.maven/maven-project

public void preserveProperties()
{
  Properties p = getProperties();
  if ( p != null )
  {
    preservedProperties = new Properties();
    for( Enumeration e = p.propertyNames(); e.hasMoreElements(); )
    {
      String key = (String) e.nextElement();
      preservedProperties.setProperty( key, p.getProperty( key ) );
    }
  }
}

代码示例来源：origin: apache/hive

private static void internProperties(Properties properties) {
 for (Enumeration<?> keys =  properties.propertyNames(); keys.hasMoreElements();) {
  String key = (String) keys.nextElement();
  String oldValue = properties.getProperty(key);
  if (oldValue != null) {
   properties.setProperty(key, oldValue.intern());
  }
 }
}

代码示例来源：origin: org.apache.maven/maven-project

public static Properties cloneProperties( Properties src )
{
  if ( src == null )
  {
    return null;
  }
  
  Properties result = new Properties();
  for( Enumeration e = src.propertyNames(); e.hasMoreElements(); )
  {
    String key = (String) e.nextElement();
    result.setProperty( key, src.getProperty( key ) );
  }
  
  return result;
}

代码示例来源：origin: spring-projects/spring-framework

/**
 * Find a matching view name in the given exception mappings.
 * @param exceptionMappings mappings between exception class names and error view names
 * @param ex the exception that got thrown during handler execution
 * @return the view name, or {@code null} if none found
 * @see #setExceptionMappings
 */
@Nullable
protected String findMatchingViewName(Properties exceptionMappings, Exception ex) {
  String viewName = null;
  String dominantMapping = null;
  int deepest = Integer.MAX_VALUE;
  for (Enumeration<?> names = exceptionMappings.propertyNames(); names.hasMoreElements();) {
    String exceptionMapping = (String) names.nextElement();
    int depth = getDepth(exceptionMapping, ex);
    if (depth >= 0 && (depth < deepest || (depth == deepest &&
        dominantMapping != null && exceptionMapping.length() > dominantMapping.length()))) {
      deepest = depth;
      dominantMapping = exceptionMapping;
      viewName = exceptionMappings.getProperty(exceptionMapping);
    }
  }
  if (viewName != null && logger.isDebugEnabled()) {
    logger.debug("Resolving to view '" + viewName + "' based on mapping [" + dominantMapping + "]");
  }
  return viewName;
}

代码示例来源：origin: spring-projects/spring-framework

@Override
protected void processProperties(ConfigurableListableBeanFactory beanFactory, Properties props)
    throws BeansException {
  for (Enumeration<?> names = props.propertyNames(); names.hasMoreElements();) {
    String key = (String) names.nextElement();
    try {
      processKey(beanFactory, key, props.getProperty(key));
    }
    catch (BeansException ex) {
      String msg = "Could not process key '" + key + "' in PropertyOverrideConfigurer";
      if (!this.ignoreInvalidKeys) {
        throw new BeanInitializationException(msg, ex);
      }
      if (logger.isDebugEnabled()) {
        logger.debug(msg, ex);
      }
    }
  }
}