net.gdface.utils

类 ClassLoaderUtils

java.lang.Object

net.gdface.utils.ClassLoaderUtils

public class ClassLoaderUtils
extends java.lang.Object

根据指定的libdirs,classpath创建URLClassLoader的工具类
classpath中"${jdk_tools_jar}"代表 $java_home/lib/tools.jar
参见 toJarURLs(String...)

作者:

guyadong

嵌套类概要

嵌套类

限定符和类型	类和说明
static class	ClassLoaderUtils.ParentStrategy parent为null时策略 defaultParentLoader 使用default parent class loader,参见URLClassLoader.newInstance(URL[]) threadContextLoader 使用当前线程的Thread Context ClassLoader作为parent,参见Thread.getContextClassLoader() currentClassLoader 使用当前类(ClassLoaderUtils)的class loader

字段概要

字段

限定符和类型	字段和说明
static java.lang.String	TOOLS_JAR

构造器概要

构造器

构造器和说明
ClassLoaderUtils()

方法概要

限定符和类型	方法和说明
static java.lang.String	getJdkToolsJar() 返回 jdk/lib/tools.jar路径
static java.net.URLClassLoader	makeURLClassLoader(java.lang.ClassLoader parent, boolean recursive, java.util.Collection<java.lang.String> libdirs, java.util.Collection<java.lang.String> classpath)
static java.net.URLClassLoader	makeURLClassLoader(java.lang.ClassLoader parent, boolean recursive, java.lang.String... libdirs)
static java.net.URLClassLoader	makeURLClassLoader(java.lang.ClassLoader parent, boolean recursive, java.lang.String[] libdirs, java.lang.String[] classpath) 根据libdirs提供的lib路径和classpath创建URLClassLoader实例 如果所有的参数中都没有找URL(jar或class 文件夹),则抛出异常
static java.net.URLClassLoader	makeURLClassLoader(java.lang.ClassLoader parent, java.lang.String... classpath)
static void	setParentLoaderStrategy(ClassLoaderUtils.ParentStrategy parentLoaderStrategy)
static void	setParentLoaderStrategy(java.lang.String parentLoaderStrategy)

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

TOOLS_JAR

public static final java.lang.String TOOLS_JAR

另请参阅:

常量字段值

构造器详细资料

ClassLoaderUtils

public ClassLoaderUtils()

方法详细资料

makeURLClassLoader

public static final java.net.URLClassLoader makeURLClassLoader(java.lang.ClassLoader parent,
                                                               java.lang.String... classpath)

另请参阅:

makeURLClassLoader(ClassLoader, boolean, String[], String[])

makeURLClassLoader

public static final java.net.URLClassLoader makeURLClassLoader(java.lang.ClassLoader parent,
                                                               boolean recursive,
                                                               java.lang.String... libdirs)

另请参阅:

makeURLClassLoader(ClassLoader, boolean, String[], String[])

makeURLClassLoader

public static final java.net.URLClassLoader makeURLClassLoader(java.lang.ClassLoader parent,
                                                               boolean recursive,
                                                               java.lang.String[] libdirs,
                                                               java.lang.String[] classpath)

根据libdirs提供的lib路径和classpath创建URLClassLoader实例
如果所有的参数中都没有找URL(jar或class 文件夹),则抛出异常

参数:

parent - 指定父类加载器,为null时根据parentLoaderStrategy决定parent

recursive - 指示是否递归搜索文件夹,对 libdirs有效,see also toJarURLs(File, boolean)

libdirs - path列表,path为jar包或jar所在文件夹(such as 'lib')

classpath - jar包或class文件夹路径

返回:

URLClassLoader实例

另请参阅:

URLClassLoader.newInstance(URL[],ClassLoader), Thread.getContextClassLoader()

makeURLClassLoader

public static final java.net.URLClassLoader makeURLClassLoader(java.lang.ClassLoader parent,
                                                               boolean recursive,
                                                               java.util.Collection<java.lang.String> libdirs,
                                                               java.util.Collection<java.lang.String> classpath)

另请参阅:

makeURLClassLoader(ClassLoader, boolean, String[], String[])

setParentLoaderStrategy

public static final void setParentLoaderStrategy(ClassLoaderUtils.ParentStrategy parentLoaderStrategy)

参数:

parentLoaderStrategy - if null,ClassLoaderUtils.ParentStrategy.currentClassLoader instead

另请参阅:

makeURLClassLoader(ClassLoader, boolean, String[], String[]), parentLoaderStrategy

setParentLoaderStrategy

public static final void setParentLoaderStrategy(java.lang.String parentLoaderStrategy)

另请参阅:

setParentLoaderStrategy(ParentStrategy)

getJdkToolsJar

public static java.lang.String getJdkToolsJar()

返回 jdk/lib/tools.jar路径