com.alibaba.nacos.common.utils

类 ClassUtils

java.lang.Object

com.alibaba.nacos.common.utils.ClassUtils

public final class ClassUtils
extends Object

Utils for Class.

作者:

liaochuntao

字段概要

字段

限定符和类型	字段和说明
static String	ARRAY_SUFFIX

方法概要

限定符和类型	方法和说明
static String	classPackageAsResourcePath(Class<?> clazz) Given an input class object, return a string which consists of the class's package name as a pathname, i.e., all dots ('.') are replaced by slashes ('/').
static String	convertClassNameToResourcePath(String className) Convert a "."
static Class	findClassByName(String className) Finds and returns class by className.
static Class<?>	forName(String name, ClassLoader classLoader) Replacement for Class.forName() that also returns Class instances for primitives (e.g.
static String	getCanonicalName(Class cls) Gets and returns the canonical name of the underlying class.
static String	getCanonicalName(Object obj) Gets and returns the canonical name of the underlying class.
static ClassLoader	getDefaultClassLoader() Return the default ClassLoader to use: typically the thread context ClassLoader, if available; the ClassLoader that loaded the ClassUtils class will be used as fallback.
static String	getName(Class cls) Gets and returns the class name.
static String	getName(Object obj) Gets and returns className.
static String	getSimpleName(Class cls) Gets and returns the simple name of the underlying class.
static String	getSimpleName(Object obj) Gets and returns the simple name of the underlying class as given in the source code.
static boolean	isAssignableFrom(Class clazz, Class cls) Determines if the class or interface represented by this object is either the same as, or is a superclass or superinterface of, the class or interface represented by the specified parameter.
static Class<?>	resolvePrimitiveClassName(String name) Resolve the given class name as primitive class, if appropriate, according to the JVM's naming rules for primitive classes.
static String	resourcePathToConvertClassName(String className) Convert a "."

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

ARRAY_SUFFIX

public static final String ARRAY_SUFFIX

另请参阅:

常量字段值

方法详细资料

findClassByName

public static Class findClassByName(String className)

Finds and returns class by className.

参数:

className - String value for className.

返回:

class Instances of the class represent classes and interfaces.

isAssignableFrom

public static boolean isAssignableFrom(Class clazz,
                                       Class cls)

Determines if the class or interface represented by this object is either the same as, or is a superclass or superinterface of, the class or interface represented by the specified parameter.

参数:

clazz - Instances of the class represent classes and interfaces.

cls - Instances of the class represent classes and interfaces.

返回:

the value indicating whether objects of the type can be assigned to objects of this class.

getName

public static String getName(Class cls)

Gets and returns the class name.

参数:

cls - Instances of the class represent classes and interfaces.

返回:

the name of the class or interface represented by this object.

getName

public static String getName(Object obj)

Gets and returns className.

参数:

obj - Object instance.

返回:

className.

getCanonicalName

public static String getCanonicalName(Class cls)

Gets and returns the canonical name of the underlying class.

参数:

cls - Instances of the class represent classes and interfaces.

返回:

The canonical name of the underlying class.

getCanonicalName

public static String getCanonicalName(Object obj)

Gets and returns the canonical name of the underlying class.

参数:

obj - Object instance.

返回:

The canonical name of the underlying class.

getSimpleName

public static String getSimpleName(Class cls)

Gets and returns the simple name of the underlying class.

参数:

cls - Instances of the class represent classes and interfaces.

返回:

the simple name of the underlying class.

getSimpleName

public static String getSimpleName(Object obj)

Gets and returns the simple name of the underlying class as given in the source code.

参数:

obj - Object instance.

返回:

the simple name of the underlying class.

forName

public static Class<?> forName(String name,
                               ClassLoader classLoader)
                        throws ClassNotFoundException,
                               LinkageError

Replacement for Class.forName() that also returns Class instances for primitives (e.g. "int") and array class names (e.g. "String[]"). Furthermore, it is also capable of resolving nested class names in Java source style (e.g. "java.lang.Thread.State" instead of "java.lang.Thread$State").

参数:

name - the name of the Class

classLoader - the class loader to use (may be null, which indicates the default class loader)

返回:

a class instance for the supplied name

抛出:

ClassNotFoundException - if the class was not found

LinkageError - if the class file could not be loaded

另请参阅:

Class.forName(String, boolean, ClassLoader)

resolvePrimitiveClassName

public static Class<?> resolvePrimitiveClassName(String name)

Resolve the given class name as primitive class, if appropriate, according to the JVM's naming rules for primitive classes.

Also supports the JVM's internal class names for primitive arrays. Does not support the "[]" suffix notation for primitive arrays; this is only supported by forName(String, ClassLoader).

参数:

name - the name of the potentially primitive class

返回:

the primitive class, or null if the name does not denote a primitive class or primitive array class

getDefaultClassLoader

public static ClassLoader getDefaultClassLoader()

Return the default ClassLoader to use: typically the thread context ClassLoader, if available; the ClassLoader that loaded the ClassUtils class will be used as fallback.

Call this method if you intend to use the thread context ClassLoader in a scenario where you clearly prefer a non-null ClassLoader reference: for example, for class path resource loading (but not necessarily for Class.forName, which accepts a null ClassLoader reference as well).

返回:

the default ClassLoader (only null if even the system ClassLoader isn't accessible)

另请参阅:

Thread.getContextClassLoader(), ClassLoader.getSystemClassLoader()

classPackageAsResourcePath

public static String classPackageAsResourcePath(Class<?> clazz)

Given an input class object, return a string which consists of the class's package name as a pathname, i.e., all dots ('.') are replaced by slashes ('/'). Neither a leading nor trailing slash is added. The result could be concatenated with a slash and the name of a resource and fed directly to ClassLoader.getResource(). For it to be fed to Class.getResource instead, a leading slash would also have to be prepended to the returned value.

参数:

clazz - the input class. A null value or the default (empty) package will result in an empty string ("") being returned.

返回:

a path which represents the package name

另请参阅:

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

convertClassNameToResourcePath

public static String convertClassNameToResourcePath(String className)

Convert a "."-based fully qualified class name to a "/"-based resource path.

参数:

className - the fully qualified class name

返回:

the corresponding resource path, pointing to the class

resourcePathToConvertClassName

public static String resourcePathToConvertClassName(String className)

Convert a "."-based fully qualified class name to a "/"-based resource path.

参数:

className - the fully qualified class name

返回:

the corresponding resource path, pointing to the class