类 PropertyPlaceholderConfigurer

字段详细资料

• SYSTEM_PROPERTIES_MODE_NEVER

  public static final int SYSTEM_PROPERTIES_MODE_NEVER

  Never check system properties.

  另请参阅:

  常量字段值

• SYSTEM_PROPERTIES_MODE_FALLBACK

  public static final int SYSTEM_PROPERTIES_MODE_FALLBACK

  Check system properties if not resolvable in the specified properties. This is the default.

  另请参阅:

  常量字段值

• SYSTEM_PROPERTIES_MODE_OVERRIDE

  public static final int SYSTEM_PROPERTIES_MODE_OVERRIDE

  Check system properties first, before trying the specified properties. This allows system properties to override any other property source.

  另请参阅:

  常量字段值

构造器详细资料

• PropertyPlaceholderConfigurer

  public PropertyPlaceholderConfigurer()

方法详细资料

• setSystemPropertiesModeName

  public void setSystemPropertiesModeName​(String constantName)
                                   throws IllegalArgumentException

  Set the system property mode by the name of the corresponding constant, e.g. "SYSTEM_PROPERTIES_MODE_OVERRIDE".

  参数:

  constantName - name of the constant

  抛出:

  IllegalArgumentException

  另请参阅:

  setSystemPropertiesMode(int)

• setSystemPropertiesMode

  public void setSystemPropertiesMode​(int systemPropertiesMode)

  Set how to check system properties: as fallback, as override, or never. For example, will resolve ${user.dir} to the "user.dir" system property.

  The default is "fallback": If not being able to resolve a placeholder with the specified properties, a system property will be tried. "override" will check for a system property first, before trying the specified properties. "never" will not check system properties at all.

  另请参阅:

  SYSTEM_PROPERTIES_MODE_NEVER, SYSTEM_PROPERTIES_MODE_FALLBACK, SYSTEM_PROPERTIES_MODE_OVERRIDE, setSystemPropertiesModeName(java.lang.String)

• setSearchSystemEnvironment

  public void setSearchSystemEnvironment​(boolean searchSystemEnvironment)

  Set whether to search for a matching system environment variable if no matching system property has been found. Only applied when "systemPropertyMode" is active (i.e. "fallback" or "override"), right after checking JVM system properties.

  Default is "true". Switch this setting off to never resolve placeholders against system environment variables. Note that it is generally recommended to pass external values in as JVM system properties: This can easily be achieved in a startup script, even for existing environment variables.

  另请参阅:

  setSystemPropertiesMode(int), System.getProperty(String), System.getenv(String)

• resolvePlaceholder

  protected String resolvePlaceholder​(String placeholder,
                                      Properties props,
                                      int systemPropertiesMode)

  Resolve the given placeholder using the given properties, performing a system properties check according to the given mode.

  The default implementation delegates to resolvePlaceholder (placeholder, props) before/after the system properties check.

  Subclasses can override this for custom resolution strategies, including customized points for the system properties check.

  参数:

  placeholder - the placeholder to resolve

  props - the merged properties of this configurer

  systemPropertiesMode - the system properties mode, according to the constants in this class

  返回:

  the resolved value, of null if none

  另请参阅:

  setSystemPropertiesMode(int), System.getProperty(java.lang.String), resolvePlaceholder(String, java.util.Properties)

• resolvePlaceholder

  protected String resolvePlaceholder​(String placeholder,
                                      Properties props)

  Resolve the given placeholder using the given properties. The default implementation simply checks for a corresponding property key.

  Subclasses can override this for customized placeholder-to-key mappings or custom resolution strategies, possibly just using the given properties as fallback.

  Note that system properties will still be checked before respectively after this method is invoked, according to the system properties mode.

  参数:

  placeholder - the placeholder to resolve

  props - the merged properties of this configurer

  返回:

  the resolved value, of null if none

  另请参阅:

  setSystemPropertiesMode(int)

• resolveSystemProperty

  protected String resolveSystemProperty​(String key)

  Resolve the given key as JVM system property, and optionally also as system environment variable if no matching system property has been found.

  参数:

  key - the placeholder to resolve as system property key

  返回:

  the system property value, or null if not found

  另请参阅:

  setSearchSystemEnvironment(boolean), System.getProperty(String), System.getenv(String)

• processProperties

  protected void processProperties​(ConfigurableListableBeanFactory beanFactoryToProcess,
                                   Properties props)
                            throws BeansException

  Visit each bean definition in the given bean factory and attempt to replace ${...} property placeholders with values from the given properties.

  指定者:

  processProperties 在类中 PropertyResourceConfigurer

  参数:

  beanFactoryToProcess - the BeanFactory used by the application context

  props - the Properties to apply

  抛出:

  BeansException - in case of errors

• parseStringValue

  @Deprecated
  protected String parseStringValue​(String strVal,
                                    Properties props,
                                    Set<?> visitedPlaceholders)

  已过时。

  as of Spring 3.0, in favor of using resolvePlaceholder(java.lang.String, java.util.Properties, int) with PropertyPlaceholderHelper. Only retained for compatibility with Spring 2.5 extensions.
  Parse the given String value for placeholder resolution.

  参数:

  strVal - the String value to parse

  props - the Properties to resolve placeholders against

  visitedPlaceholders - the placeholders that have already been visited during the current resolution attempt (ignored in this version of the code)