java.lang.Object
- com.alibaba.nacos.common.packagescan.resource.AbstractResource

所有已实现的接口:

InputStreamSource, Resource

直接已知子类:

AbstractFileResolvingResource, ByteArrayResource, FileSystemResource, InputStreamResource, PathResource, VfsResource
```
public abstract class AbstractResource
extends java.lang.Object
implements Resource
```
Copy from https://github.com/spring-projects/spring-framework.git, with less modifications Convenience base class for Resource implementations, pre-implementing typical behavior.
The "exists" method will check whether a File or InputStream can be opened; "isOpen" will always return false; "getURL" and "getFile" throw an exception; and "toString" will return the description.

从以下版本开始:

28.12.2003

作者:

Juergen Hoeller, Sam Brannen

构造器概要

构造器
构造器说明

AbstractResource()

方法概要

所有方法实例方法具体方法
修饰符和类型	方法	说明
`long`	`contentLength()`	This method reads the entire InputStream to determine the content length.
`Resource`	`createRelative(java.lang.String relativePath)`	This implementation throws a FileNotFoundException, assuming that relative resources cannot be created for this resource.
`boolean`	`equals(java.lang.Object other)`	This implementation compares description strings.
`boolean`	`exists()`	This implementation checks whether a File can be opened, falling back to whether an InputStream can be opened.
`java.io.File`	`getFile()`	This implementation throws a FileNotFoundException, assuming that the resource cannot be resolved to an absolute file path.
`protected java.io.File`	`getFileForLastModifiedCheck()`	Determine the File to use for timestamp checking.
`java.lang.String`	`getFilename()`	This implementation always returns `null`, assuming that this resource type does not have a filename.
`java.net.URI`	`getUri()`	This implementation builds a URI based on the URL returned by `getUrl()`.
`java.net.URL`	`getUrl()`	This implementation throws a FileNotFoundException, assuming that the resource cannot be resolved to a URL.
`int`	`hashCode()`	This implementation returns the description's hash code.
`boolean`	`isFile()`	This implementation always returns `false`.
`boolean`	`isOpen()`	This implementation always returns `false`.
`boolean`	`isReadable()`	This implementation always returns `true` for a resource that `exists` (revised as of 5.1).
`long`	`lastModified()`	This implementation checks the timestamp of the underlying File, if available.
`java.nio.channels.ReadableByteChannel`	`readableChannel()`	This implementation returns `Channels.newChannel(InputStream)` with the result of `InputStreamSource.getInputStream()`.
`java.lang.String`	`toString()`	This implementation returns the description of this resource.

从类继承的方法 java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait

从接口继承的方法 com.alibaba.nacos.common.packagescan.resource.InputStreamSource
getInputStream

从接口继承的方法 com.alibaba.nacos.common.packagescan.resource.Resource
getDescription

- 构造器详细资料
  - AbstractResource
```
public AbstractResource()
```
- 方法详细资料
  - exists
```
public boolean exists()
```
    This implementation checks whether a File can be opened, falling back to whether an InputStream can be opened. This will cover both directories and content resources.
    
    指定者:
    
    exists 在接口中 Resource
  - isReadable
```
public boolean isReadable()
```
    This implementation always returns true for a resource that exists (revised as of 5.1).
    
    指定者:
    
    isReadable 在接口中 Resource
    
    另请参阅:
    
    InputStreamSource.getInputStream(), Resource.exists()
  - isOpen
```
public boolean isOpen()
```
    This implementation always returns false.
    
    指定者:
    
    isOpen 在接口中 Resource
  - isFile
```
public boolean isFile()
```
    This implementation always returns false.
    
    指定者:
    
    isFile 在接口中 Resource
    
    另请参阅:
    
    Resource.getFile()
  - getUrl
```
public java.net.URL getUrl()
                    throws java.io.IOException
```
    This implementation throws a FileNotFoundException, assuming that the resource cannot be resolved to a URL.
    
    指定者:
    
    getUrl 在接口中 Resource
    
    抛出:
    
    java.io.IOException - if the resource cannot be resolved as URL, i.e. if the resource is not available as descriptor
  - getUri
```
public java.net.URI getUri()
                    throws java.io.IOException
```
    This implementation builds a URI based on the URL returned by getUrl().
    
    指定者:
    
    getUri 在接口中 Resource
    
    抛出:
    
    java.io.IOException - if the resource cannot be resolved as URI, i.e. if the resource is not available as descriptor
  - getFile
```
public java.io.File getFile()
                     throws java.io.IOException
```
    This implementation throws a FileNotFoundException, assuming that the resource cannot be resolved to an absolute file path.
    
    指定者:
    
    getFile 在接口中 Resource
    
    抛出:
    
    java.io.FileNotFoundException - if the resource cannot be resolved as absolute file path, i.e. if the resource is not available in a file system
    
    java.io.IOException - in case of general resolution/reading failures
    
    另请参阅:
    
    InputStreamSource.getInputStream()
  - readableChannel
```
public java.nio.channels.ReadableByteChannel readableChannel()
                                                      throws java.io.IOException
```
    This implementation returns Channels.newChannel(InputStream) with the result of InputStreamSource.getInputStream(). This is the same as in Resource's corresponding default method but mirrored here for efficient JVM-level dispatching in a class hierarchy.
    
    指定者:
    
    readableChannel 在接口中 Resource
    
    返回:
    
    the byte channel for the underlying resource (must not be null)
    
    抛出:
    
    java.io.FileNotFoundException - if the underlying resource doesn't exist
    
    java.io.IOException - if the content channel could not be opened
    
    另请参阅:
    
    InputStreamSource.getInputStream()
  - contentLength
```
public long contentLength()
                   throws java.io.IOException
```
    This method reads the entire InputStream to determine the content length. For a custom sub-class of InputStreamResource, we strongly recommend overriding this method with a more optimal implementation, e.g. checking File length, or possibly simply returning -1 if the stream can only be read once.
    
    指定者:
    
    contentLength 在接口中 Resource
    
    抛出:
    
    java.io.IOException - if the resource cannot be resolved (in the file system or as some other known physical resource type)
    
    另请参阅:
    
    InputStreamSource.getInputStream()
  - lastModified
```
public long lastModified()
                  throws java.io.IOException
```
    This implementation checks the timestamp of the underlying File, if available.
    
    指定者:
    
    lastModified 在接口中 Resource
    
    抛出:
    
    java.io.IOException - if the resource cannot be resolved (in the file system or as some other known physical resource type)
    
    另请参阅:
    
    getFileForLastModifiedCheck()
  - getFileForLastModifiedCheck
```
protected java.io.File getFileForLastModifiedCheck()
                                            throws java.io.IOException
```
    Determine the File to use for timestamp checking. The default implementation delegates to getFile().
    
    返回:
    
    the File to use for timestamp checking (never null)
    
    抛出:
    
    java.io.FileNotFoundException - if the resource cannot be resolved as an absolute file path, i.e. is not available in a file system
    
    java.io.IOException - in case of general resolution/reading failures
  - createRelative
```
public Resource createRelative(java.lang.String relativePath)
                        throws java.io.IOException
```
    This implementation throws a FileNotFoundException, assuming that relative resources cannot be created for this resource.
    
    指定者:
    
    createRelative 在接口中 Resource
    
    参数:
    
    relativePath - the relative path (relative to this resource)
    
    返回:
    
    the resource handle for the relative resource
    
    抛出:
    
    java.io.IOException - if the relative resource cannot be determined
  - getFilename
```
public java.lang.String getFilename()
```
    This implementation always returns null, assuming that this resource type does not have a filename.
    
    指定者:
    
    getFilename 在接口中 Resource
  - equals
```
public boolean equals(java.lang.Object other)
```
    This implementation compares description strings.
    
    覆盖:
    
    equals 在类中 java.lang.Object
    
    另请参阅:
    
    Resource.getDescription()
  - hashCode
```
public int hashCode()
```
    This implementation returns the description's hash code.
    
    覆盖:
    
    hashCode 在类中 java.lang.Object
    
    另请参阅:
    
    Resource.getDescription()
  - toString
```
public java.lang.String toString()
```
    This implementation returns the description of this resource.
    
    覆盖:
    
    toString 在类中 java.lang.Object
    
    另请参阅:
    
    Resource.getDescription()

类 AbstractResource

构造器概要

方法概要

从类继承的方法 java.lang.Object

从接口继承的方法 com.alibaba.nacos.common.packagescan.resource.InputStreamSource

从接口继承的方法 com.alibaba.nacos.common.packagescan.resource.Resource

构造器详细资料

AbstractResource

方法详细资料

exists

isReadable

isOpen

isFile

getUrl

getUri

getFile

readableChannel

contentLength

lastModified

getFileForLastModifiedCheck

createRelative

getFilename

equals

hashCode

toString