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ClassPathResource (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 ClassPathResource

java.lang.Object
  org.springframework.core.io.AbstractResource
      org.springframework.core.io.ClassPathResource

All Implemented Interfaces:

InputStreamSource, Resource

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public class ClassPathResource
extends AbstractResource

Resource implementation for class path resources. Uses either a given ClassLoader or a given Class for loading resources.

Supports resolution as java.io.File if the class path resource resides in the file system, but not for resources in a JAR. Always supports resolution as URL.

Since:

28.12.2003

Author:

Juergen Hoeller

See Also:

ClassLoader.getResourceAsStream(String), Class.getResourceAsStream(String)

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Constructor Summary
	ClassPathResource(String path)           Create a new ClassPathResource for ClassLoader usage.
	ClassPathResource(String path, Class clazz)           Create a new ClassPathResource for Class usage.
	ClassPathResource(String path, ClassLoader classLoader)           Create a new ClassPathResource for ClassLoader usage.
protected	ClassPathResource(String path, ClassLoader classLoader, Class clazz)           Create a new ClassPathResource with optional ClassLoader and Class.

 

Method Summary
Resource	createRelative(String relativePath)           This implementation creates a ClassPathResource, applying the given path relative to the path of the underlying resource of this descriptor.
boolean	equals(Object obj)           This implementation compares the underlying class path locations.
String	getDescription()           This implementation returns a description that includes the class path location.
File	getFile()           This implementation returns a File reference for the underlying class path resource, provided that it refers to a file in the file system.
String	getFilename()           This implementation returns the name of the file that this class path resource refers to.
InputStream	getInputStream()           This implementation opens an InputStream for the given class path resource.
String	getPath()           Return the path for this resource.
URL	getURL()           This implementation returns a URL for the underlying class path resource.
int	hashCode()           This implementation returns the hash code of the underlying class path location.

 

Methods inherited from class org.springframework.core.io.AbstractResource
exists, isOpen, toString

 

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

 

Constructor Detail

ClassPathResource

public ClassPathResource(String path)

Create a new ClassPathResource for ClassLoader usage. A leading slash will be removed, as the ClassLoader resource access methods will not accept it.

The thread context class loader will be used for loading the resource.

Parameters:

path - the absolute path within the class path

See Also:

ClassLoader.getResourceAsStream(String), ClassUtils.getDefaultClassLoader()

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ClassPathResource

public ClassPathResource(String path,
                         ClassLoader classLoader)

Create a new ClassPathResource for ClassLoader usage. A leading slash will be removed, as the ClassLoader resource access methods will not accept it.

Parameters:

path - the absolute path within the classpath

classLoader - the class loader to load the resource with, or null for the thread context class loader

See Also:

ClassLoader.getResourceAsStream(String)

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ClassPathResource

public ClassPathResource(String path,
                         Class clazz)

Create a new ClassPathResource for Class usage. The path can be relative to the given class, or absolute within the classpath via a leading slash.

Parameters:

path - relative or absolute path within the class path

clazz - the class to load resources with

See Also:

Class.getResourceAsStream(java.lang.String)

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ClassPathResource

protected ClassPathResource(String path,
                            ClassLoader classLoader,
                            Class clazz)

Create a new ClassPathResource with optional ClassLoader and Class. Only for internal usage.

Parameters:

path - relative or absolute path within the classpath

classLoader - the class loader to load the resource with, if any

clazz - the class to load resources with, if any

Method Detail

getPath

public final String getPath()

Return the path for this resource.

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getInputStream

public InputStream getInputStream()
                           throws IOException

This implementation opens an InputStream for the given class path resource.

Throws:

IOException - if the stream could not be opened

See Also:

ClassLoader.getResourceAsStream(String), Class.getResourceAsStream(String)

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getURL

public URL getURL()
           throws IOException

This implementation returns a URL for the underlying class path resource.

Specified by:

getURL in interface Resource

Overrides:

getURL in class AbstractResource

Throws:

IOException - if the resource cannot be resolved as URL, i.e. if the resource is not available as descriptor

See Also:

ClassLoader.getResource(String), Class.getResource(String)

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getFile

public File getFile()
             throws IOException

This implementation returns a File reference for the underlying class path resource, provided that it refers to a file in the file system.

Specified by:

getFile in interface Resource

Overrides:

getFile in class AbstractResource

Throws:

IOException - if the resource cannot be resolved as absolute file path, i.e. if the resource is not available in a file system

See Also:

ResourceUtils.getFile(java.net.URL, String)

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createRelative

public Resource createRelative(String relativePath)

This implementation creates a ClassPathResource, applying the given path relative to the path of the underlying resource of this descriptor.

Specified by:

createRelative in interface Resource

Overrides:

createRelative in class AbstractResource

Parameters:

relativePath - the relative path (relative to this resource)

Returns:

the resource handle for the relative resource

See Also:

StringUtils.applyRelativePath(String, String)

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getFilename

public String getFilename()

This implementation returns the name of the file that this class path resource refers to.

Specified by:

getFilename in interface Resource

Overrides:

getFilename in class AbstractResource

See Also:

StringUtils.getFilename(String)

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getDescription

public String getDescription()

This implementation returns a description that includes the class path location.

See Also:

Object.toString()

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equals

public boolean equals(Object obj)

This implementation compares the underlying class path locations.

Overrides:

equals in class AbstractResource

See Also:

Resource.getDescription()

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hashCode

public int hashCode()

This implementation returns the hash code of the underlying class path location.

Overrides:

hashCode in class AbstractResource

See Also:

Resource.getDescription()

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