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## org.springframework.core.io.support
Class PropertiesLoaderSupport

    java.lang.Object
      org.springframework.core.io.support.PropertiesLoaderSupport

Direct Known Subclasses:
  PropertiesFactoryBean, PropertyResourceConfigurer

    public abstract class PropertiesLoaderSupport

extends Object

Base class for JavaBean-style components that need to load properties from one or more resources. Supports local properties as well, with configurable overriding.

Since:
  1.2.2
Author:
  Juergen Hoeller

Field Summary
`protected Log` | `logger` Logger available to subclasses
`static String` | `XML_FILE_EXTENSION`

Constructor Summary
`PropertiesLoaderSupport()`

Method Summary
`protected void` | `loadProperties(Properties props)` Load properties into the given instance.
`protected Properties` | `mergeProperties()` Return a merged Properties instance containing both the loaded properties and properties set on this FactoryBean.
`void` | `setFileEncoding(String encoding)` Set the encoding to use for parsing properties files.
`void` | `setIgnoreResourceNotFound(boolean ignoreResourceNotFound)` Set if failure to find the property resource should be ignored.
`void` | `setLocalOverride(boolean localOverride)` Set whether local properties override properties from files.
`void` | `setLocation(Resource location)` Set a location of a properties file to be loaded.
`void` | `setLocations(Resource[] locations)` Set locations of properties files to be loaded.
`void` | `setProperties(Properties properties)` Set local properties, e.g.
`void` | `setPropertiesArray(Properties[] propertiesArray)` Set local properties, e.g.
`void` | `setPropertiesPersister(PropertiesPersister propertiesPersister)` Set the PropertiesPersister to use for parsing properties files.

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### XML_FILE_EXTENSION

    public static final String XML_FILE_EXTENSION

See Also:
  Constant Field Values

### logger

    protected final Log logger

  Logger available to subclasses

Constructor Detail

### PropertiesLoaderSupport

    public PropertiesLoaderSupport()

Method Detail

### setProperties

    public void setProperties(Properties properties)

  Set local properties, e.g. via the "props" tag in XML bean definitions. These can be considered defaults, to be overridden by properties loaded from files.

### setPropertiesArray

    public void setPropertiesArray(Properties[] propertiesArray)

  Set local properties, e.g. via the "props" tag in XML bean definitions, allowing for merging multiple properties sets into one.

### setLocation

    public void setLocation(Resource location)

  Set a location of a properties file to be loaded.

  Can point to a classic properties file or to an XML file that follows JDK 1.5's properties XML format.

### setLocations

    public void setLocations(Resource[] locations)

  Set locations of properties files to be loaded.

  Can point to classic properties files or to XML files that follow JDK 1.5's properties XML format.

  Note: Properties defined in later files will override properties defined earlier files, in case of overlapping keys. Hence, make sure that the most specific files are the last ones in the given list of locations.

### setLocalOverride

    public void setLocalOverride(boolean localOverride)

  Set whether local properties override properties from files.

  Default is "false": Properties from files override local defaults. Can be switched to "true" to let local properties override defaults from files.

### setIgnoreResourceNotFound

    public void setIgnoreResourceNotFound(boolean ignoreResourceNotFound)

  Set if failure to find the property resource should be ignored.

  "true" is appropriate if the properties file is completely optional. Default is "false".

### setFileEncoding

    public void setFileEncoding(String encoding)

  Set the encoding to use for parsing properties files.

  Default is none, using the `java.util.Properties` default encoding.

  Only applies to classic properties files, not to XML files.

  See Also:
    `PropertiesPersister.load(java.util.Properties, java.io.InputStream)`

### setPropertiesPersister

    public void setPropertiesPersister(PropertiesPersister propertiesPersister)

  Set the PropertiesPersister to use for parsing properties files. The default is DefaultPropertiesPersister.

  See Also:
    `DefaultPropertiesPersister`

### mergeProperties

    protected Properties mergeProperties()
                                  throws IOException

  Return a merged Properties instance containing both the loaded properties and properties set on this FactoryBean.

  Throws:
    `IOException`

### loadProperties

    protected void loadProperties(Properties props)
                           throws IOException

  Load properties into the given instance.

  Parameters:
    `props` - the Properties instance to load into
  Throws:
    `IOException` - in case of I/O errors
  See Also:
    `setLocations(org.springframework.core.io.Resource[])`

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