public interface  {


	String CLASSPATH_URL_PREFIX = ResourceUtils.CLASSPATH_URL_PREFIX;


	/**
	 * Return a Resource handle for the specified resource.
	 * The handle should always be a reusable resource descriptor,
	 * allowing for multiple {@link Resource#getInputStream()} calls.
	 * <p><ul>
	 * <li>Must support fully qualified URLs, e.g. "file:C:/test.dat".
	 * <li>Must support classpath pseudo-URLs, e.g. "classpath:test.dat".
	 * <li>Should support relative file paths, e.g. "WEB-INF/test.dat".
	 * (This will be implementation-specific, typically provided by an
	 * ApplicationContext implementation.)
	 * </ul>
	 * <p>Note that a Resource handle does not imply an existing resource;
	 * you need to invoke {@link Resource#exists} to check for existence.
	 * @param location the resource location
	 * @return a corresponding Resource handle
	 * @see #CLASSPATH_URL_PREFIX
	 * @see org.springframework.core.io.Resource#exists
	 * @see org.springframework.core.io.Resource#getInputStream
	 */
	Resource getResource(String location);

	/**
	 * Expose the ClassLoader used by this ResourceLoader.
	 * <p>Clients which need to access the ClassLoader directly can do so
	 * in a uniform manner with the ResourceLoader, rather than relying
	 * on the thread context ClassLoader.
	 * @return the ClassLoader (only {@code null} if even the system
	 * ClassLoader isn't accessible)
	 * @see org.springframework.util.ClassUtils#getDefaultClassLoader()
	 */
	ClassLoader getClassLoader();

}

public static final String CLASSPATH_URL_PREFIX = "classpath:";

/**
	 * Return the ClassLoader to load class path resources with.
	 * <p>Will get passed to ClassPathResource's constructor for all
	 * ClassPathResource objects created by this resource loader.
	 * @see ClassPathResource
	 */

	public ClassLoader getClassLoader() {
		return (this.classLoader != null ? this.classLoader : ClassUtils.getDefaultClassLoader());
	}

/**
 * Return the default ClassLoader to use: typically the thread context
 * ClassLoader, if available; the ClassLoader that loaded the ClassUtils
 * class will be used as fallback.
 * <p>Call this method if you intend to use the thread context ClassLoader
 * in a scenario where you clearly prefer a non-null ClassLoader reference:
 * for example, for class path resource loading (but not necessarily for
 * {@code Class.forName}, which accepts a {@code null} ClassLoader
 * reference as well).
 * @return the default ClassLoader (only {@code null} if even the system
 * ClassLoader isn't accessible)
 * @see Thread#getContextClassLoader()
 * @see ClassLoader#getSystemClassLoader()
 */
public static大专栏