com.sinacloud.scs.util

枚举 ClassLoaderHelper

java.lang.Object

java.lang.Enum<ClassLoaderHelper>

com.sinacloud.scs.util.ClassLoaderHelper

所有已实现的接口:

Serializable, Comparable<ClassLoaderHelper>

public enum ClassLoaderHelper
extends Enum<ClassLoaderHelper>

方法概要

方法

限定符和类型	方法和说明
static URL	getResource(String resource, boolean classesFirst, Class<?>... classes) If classesFirst is false, retrieves the resource via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the class loader of ClassLoaderHelper as the last resort.
static URL	getResource(String resource, Class<?>... classes) Retrieves the resource via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the class loader of ClassLoaderHelper as the last resort.
static InputStream	getResourceAsStream(String resource, boolean classesFirst, Class<?>... classes) If classesFirst is false, retrieves the resource as an input stream via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the class loader of ClassLoaderHelper as the last resort.
static InputStream	getResourceAsStream(String resource, Class<?>... classes) Retrieves the resource as an input stream via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the class loader of ClassLoaderHelper as the last resort.
static Class<?>	loadClass(String fqcn, boolean classesFirst, Class<?>... classes) If classesFirst is false, loads the class via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the caller class loader as the last resort.
static Class<?>	loadClass(String fqcn, Class<?>... classes) Loads the class via the optionally specified classes in the order of their specification, and if not found, via the context class loader of the current thread, and if not found, from the caller class loader as the last resort.
static ClassLoaderHelper	valueOf(String name) 返回带有指定名称的该类型的枚举常量。
static ClassLoaderHelper[]	values() 按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。

从类继承的方法 java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

从类继承的方法 java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

方法详细资料

values

public static ClassLoaderHelper[] values()

按照声明该枚举类型的常量的顺序, 返回 包含这些常量的数组。该方法可用于迭代 常量, 如下所示:

for (ClassLoaderHelper c : ClassLoaderHelper.values())
    System.out.println(c);

返回:

按照声明该枚举类型的常量的顺序返回的包含这些常量的数组

valueOf

public static ClassLoaderHelper valueOf(String name)

返回带有指定名称的该类型的枚举常量。 字符串必须与用于声明该类型的枚举常量的 标识符完全匹配。(不允许有多余 的空格字符。)

参数:

name - 要返回的枚举常量的名称。

返回:

返回带有指定名称的枚举常量

抛出:

IllegalArgumentException - 如果该枚举类型没有带有指定名称的常量

NullPointerException - 如果参数为空值

getResource

public static URL getResource(String resource,
              Class<?>... classes)

Retrieves the resource via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the class loader of ClassLoaderHelper as the last resort.

参数:

resource - resource to be loaded

classes - class loader providers

返回:

the resource loaded as an URL or null if not found.

getResource

public static URL getResource(String resource,
              boolean classesFirst,
              Class<?>... classes)

If classesFirst is false, retrieves the resource via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the class loader of ClassLoaderHelper as the last resort.

If classesFirst is true, retrieves the resource via the optionally specified classes in the order of their specification, and if not found, via the context class loader of the current thread, and if not found, from the class loader of ClassLoaderHelper as the last resort.

参数:

resource - resource to be loaded

classesFirst - true if the class loaders of the optionally specified classes take precedence over the context class loader of the current thread; false if the opposite is true.

classes - class loader providers

返回:

the resource loaded as an URL or null if not found.

loadClass

public static Class<?> loadClass(String fqcn,
                 Class<?>... classes)
                          throws ClassNotFoundException

Loads the class via the optionally specified classes in the order of their specification, and if not found, via the context class loader of the current thread, and if not found, from the caller class loader as the last resort.

参数:

fqcn - fully qualified class name of the target class to be loaded

classes - class loader providers

返回:

the class loaded; never null

抛出:

ClassNotFoundException - if failed to load the class

loadClass

public static Class<?> loadClass(String fqcn,
                 boolean classesFirst,
                 Class<?>... classes)
                          throws ClassNotFoundException

If classesFirst is false, loads the class via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the caller class loader as the last resort.

If classesFirst is true, loads the class via the optionally specified classes in the order of their specification, and if not found, via the context class loader of the current thread, and if not found, from the caller class loader as the last resort.

参数:

fqcn - fully qualified class name of the target class to be loaded

classesFirst - true if the class loaders of the optionally specified classes take precedence over the context class loader of the current thread; false if the opposite is true.

classes - class loader providers

返回:

the class loaded; never null

抛出:

ClassNotFoundException - if failed to load the class

getResourceAsStream

public static InputStream getResourceAsStream(String resource,
                              Class<?>... classes)

Retrieves the resource as an input stream via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the class loader of ClassLoaderHelper as the last resort.

参数:

resource - resource to be loaded

classes - class loader providers

返回:

the resource loaded as an input stream or null if not found.

getResourceAsStream

public static InputStream getResourceAsStream(String resource,
                              boolean classesFirst,
                              Class<?>... classes)

If classesFirst is false, retrieves the resource as an input stream via the context class loader of the current thread, and if not found, via the class loaders of the optionally specified classes in the order of their specification, and if not found, from the class loader of ClassLoaderHelper as the last resort.

If classesFirst is true, retrieves the resource as an input stream via the optionally specified classes in the order of their specification, and if not found, via the context class loader of the current thread, and if not found, from the class loader of ClassLoaderHelper as the last resort.

参数:

resource - resource to be loaded

classesFirst - true if the class loaders of the optionally specified classes take precedence over the context class loader of the current thread; false if the opposite is true.

classes - class loader providers

返回:

the resource loaded as an input stream or null if not found.