org.datayoo.moql.util

类 ResourceUtils

java.lang.Object

org.datayoo.moql.util.ResourceUtils

public abstract class ResourceUtils
extends java.lang.Object

作者:

Tang Tadin

字段概要

字段

限定符和类型	字段和说明
static java.lang.String	CLASSPATH_URL_PREFIX Pseudo URL prefix for loading from the class path: "classpath:"
static java.lang.String	FILE_URL_PREFIX URL prefix for loading from the file system: "file:"
static java.lang.String	JAR_URL_SEPARATOR Separator between JAR URL and file path within the JAR
static java.lang.String	PREFIX_SEPARATOR
static java.lang.String	URL_PROTOCOL_FILE URL protocol for a file in the file system: "file"
static java.lang.String	URL_PROTOCOL_JAR URL protocol for an entry from a jar file: "jar"
static java.lang.String	URL_PROTOCOL_ZIP URL protocol for an entry from a zip file: "zip"

构造器概要

构造器

构造器和说明
ResourceUtils()

方法概要

限定符和类型	方法和说明
static java.net.URL	extractJarFileURL(java.net.URL jarUrl) Extract the URL for the actual jar file from the given URL (which may point to a resource in a jar file or to a jar file itself).
static java.io.File	getFile(java.lang.String resourceLocation) Resolve the given resource location to a java.io.File, i.e.
static java.io.File	getFile(java.net.URI resourceUri) Resolve the given resource URI to a java.io.File, i.e. to a file in the file system.
static java.io.File	getFile(java.net.URL resourceUrl) Resolve the given resource URL to a java.io.File, i.e. to a file in the file system.
static java.net.URL	getURL(java.lang.String resourceLocation) Resolve the given resource location to a java.net.URL.
static boolean	isJarURL(java.net.URL url) Determine whether the given URL points to a resource in a jar file, that is, has protocol "jar", "zip".
static boolean	isUrl(java.lang.String resourceLocation) Return whether the given resource location is a URL: either a special "classpath" pseudo URL or a standard URL.
static java.net.URI	toURI(java.lang.String location) Create a URI instance for the given location String, replacing spaces with "%20" quotes first.
static java.net.URI	toURI(java.net.URL url) Create a URI instance for the given URL, replacing spaces with "%20" quotes first.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

字段详细资料

PREFIX_SEPARATOR

public static final java.lang.String PREFIX_SEPARATOR

另请参阅:

常量字段值

CLASSPATH_URL_PREFIX

public static final java.lang.String CLASSPATH_URL_PREFIX

Pseudo URL prefix for loading from the class path: "classpath:"

另请参阅:

常量字段值

FILE_URL_PREFIX

public static final java.lang.String FILE_URL_PREFIX

URL prefix for loading from the file system: "file:"

另请参阅:

常量字段值

URL_PROTOCOL_FILE

public static final java.lang.String URL_PROTOCOL_FILE

URL protocol for a file in the file system: "file"

另请参阅:

常量字段值

URL_PROTOCOL_JAR

public static final java.lang.String URL_PROTOCOL_JAR

URL protocol for an entry from a jar file: "jar"

另请参阅:

常量字段值

URL_PROTOCOL_ZIP

public static final java.lang.String URL_PROTOCOL_ZIP

URL protocol for an entry from a zip file: "zip"

另请参阅:

常量字段值

JAR_URL_SEPARATOR

public static final java.lang.String JAR_URL_SEPARATOR

Separator between JAR URL and file path within the JAR

另请参阅:

常量字段值

构造器详细资料

ResourceUtils

public ResourceUtils()

方法详细资料

getURL

public static java.net.URL getURL(java.lang.String resourceLocation)
                           throws java.io.FileNotFoundException

Resolve the given resource location to a java.net.URL.

Does not check whether the URL actually exists; simply returns the URL that the given location would correspond to.

参数:

resourceLocation - the resource location to resolve: either a "classpath:" pseudo URL, a "file:" URL, or a plain file path

返回:

a corresponding URL object

抛出:

java.io.FileNotFoundException - if the resource cannot be resolved to a URL

getFile

public static java.io.File getFile(java.lang.String resourceLocation)
                            throws java.io.FileNotFoundException

Resolve the given resource location to a java.io.File, i.e. to a file in the file system.

Does not check whether the file actually exists; simply returns the File that the given location would correspond to.

参数:

resourceLocation - the resource location to resolve: either a "classpath:" pseudo URL, a "file:" URL, or a plain file path

返回:

a corresponding File object

抛出:

java.io.FileNotFoundException - if the resource cannot be resolved to a file in the file system

getFile

public static java.io.File getFile(java.net.URL resourceUrl)
                            throws java.io.FileNotFoundException

Resolve the given resource URL to a java.io.File, i.e. to a file in the file system.

参数:

resourceUrl - the resource URL to resolve

返回:

a corresponding File object

抛出:

java.io.FileNotFoundException - if the URL cannot be resolved to a file in the file system

getFile

public static java.io.File getFile(java.net.URI resourceUri)
                            throws java.io.FileNotFoundException

Resolve the given resource URI to a java.io.File, i.e. to a file in the file system.

参数:

resourceUri - the resource URI to resolve

返回:

a corresponding File object

抛出:

java.io.FileNotFoundException - if the URL cannot be resolved to a file in the file system

isUrl

public static boolean isUrl(java.lang.String resourceLocation)

Return whether the given resource location is a URL: either a special "classpath" pseudo URL or a standard URL.

参数:

resourceLocation - the location String to check

返回:

whether the location qualifies as a URL

isJarURL

public static boolean isJarURL(java.net.URL url)

Determine whether the given URL points to a resource in a jar file, that is, has protocol "jar", "zip".

参数:

url - the URL to check

返回:

whether the URL has been identified as a JAR URL

extractJarFileURL

public static java.net.URL extractJarFileURL(java.net.URL jarUrl)
                                      throws java.net.MalformedURLException

Extract the URL for the actual jar file from the given URL (which may point to a resource in a jar file or to a jar file itself).

参数:

jarUrl - the original URL

返回:

the URL for the actual jar file

抛出:

java.net.MalformedURLException - if no valid jar file URL could be extracted

toURI

public static java.net.URI toURI(java.net.URL url)
                          throws java.net.URISyntaxException

Create a URI instance for the given URL, replacing spaces with "%20" quotes first.

Furthermore, this method works on JDK 1.4 as well, in contrast to the URL.toURI() method.

参数:

url - the URL to convert into a URI instance

返回:

the URI instance

抛出:

java.net.URISyntaxException - if the URL wasn't a valid URI

toURI

public static java.net.URI toURI(java.lang.String location)
                          throws java.net.URISyntaxException

Create a URI instance for the given location String, replacing spaces with "%20" quotes first.

参数:

location - the location String to convert into a URI instance

返回:

the URI instance

抛出:

java.net.URISyntaxException - if the location wasn't a valid URI