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DefaultResourceLoader (Spring Framework API 2.1) - Spring Framework 2.1.0 API 文档英文版

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org.springframework.core.io
Class DefaultResourceLoader

java.lang.Object
  org.springframework.core.io.DefaultResourceLoader

All Implemented Interfaces:

ResourceLoader

Direct Known Subclasses:

AbstractApplicationContext, FileSystemResourceLoader, PortletContextResourceLoader, ServletContextResourceLoader

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public class DefaultResourceLoader
extends Object
implements ResourceLoader

Default implementation of the ResourceLoader interface. Used by ResourceEditor, and serves as base class for AbstractApplicationContext. Can also be used standalone.

Will return a UrlResource if the location value is a URL, and a ClassPathResource if it is a non-URL path or a "classpath:" pseudo-URL.

Since:

10.03.2004

Author:

Juergen Hoeller

See Also:

FileSystemResourceLoader, ClassPathXmlApplicationContext

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Field Summary

 

Fields inherited from interface org.springframework.core.io.ResourceLoader
CLASSPATH_URL_PREFIX

 

Constructor Summary
DefaultResourceLoader()           Create a new DefaultResourceLoader.
DefaultResourceLoader(ClassLoader classLoader)           Create a new DefaultResourceLoader.

 

Method Summary
ClassLoader	getClassLoader()           Return the ClassLoader to load class path resources with, or null if using the thread context class loader on actual access (applying to the thread that constructs the ClassPathResource object).
Resource	getResource(String location)           Return a Resource handle for the specified resource.
protected  Resource	getResourceByPath(String path)           Return a Resource handle for the resource at the given path.
void	setClassLoader(ClassLoader classLoader)           Specify the ClassLoader to load class path resources with, or null for using the thread context class loader at the time of actual resource access.

 

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

 

Constructor Detail

DefaultResourceLoader

public DefaultResourceLoader()

Create a new DefaultResourceLoader.

ClassLoader access will happen using the thread context class loader at the time of this ResourceLoader's initialization.

See Also:

Thread.getContextClassLoader()

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DefaultResourceLoader

public DefaultResourceLoader(ClassLoader classLoader)

Create a new DefaultResourceLoader.

Parameters:

classLoader - the ClassLoader to load class path resources with, or null for using the thread context class loader at the time of actual resource access

Method Detail

setClassLoader

public void setClassLoader(ClassLoader classLoader)

Specify the ClassLoader to load class path resources with, or null for using the thread context class loader at the time of actual resource access.

The default is that ClassLoader access will happen using the thread context class loader at the time of this ResourceLoader's initialization.

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getClassLoader

public ClassLoader getClassLoader()

Return the ClassLoader to load class path resources with, or null if using the thread context class loader on actual access (applying to the thread that constructs the ClassPathResource object).

Will get passed to ClassPathResource's constructor for all ClassPathResource objects created by this resource loader.

Specified by:

getClassLoader in interface ResourceLoader

Returns:

the ClassLoader (never null)

See Also:

ClassPathResource

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getResource

public Resource getResource(String location)

Description copied from interface: ResourceLoader

Return a Resource handle for the specified resource. The handle should always be a reusable resource descriptor, allowing for multiple InputStreamSource.getInputStream() calls.

• Must support fully qualified URLs, e.g. "file:C:/test.dat".
• Must support classpath pseudo-URLs, e.g. "classpath:test.dat".
• Should support relative file paths, e.g. "WEB-INF/test.dat". (This will be implementation-specific, typically provided by an ApplicationContext implementation.)

Note that a Resource handle does not imply an existing resource; you need to invoke Resource.exists() to check for existence.

Specified by:

getResource in interface ResourceLoader

Parameters:

location - the resource location

Returns:

a corresponding Resource handle

See Also:

ResourceLoader.CLASSPATH_URL_PREFIX, Resource.exists(), InputStreamSource.getInputStream()

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getResourceByPath

protected Resource getResourceByPath(String path)

Return a Resource handle for the resource at the given path.

The default implementation supports class path locations. This should be appropriate for standalone implementations but can be overridden, e.g. for implementations targeted at a Servlet container.

Parameters:

path - path to the resource

Returns:

Resource handle

See Also:

ClassPathResource, FileSystemXmlApplicationContext.getResourceByPath(java.lang.String), AbstractRefreshableWebApplicationContext.getResourceByPath(java.lang.String)

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