java.lang.Object
- org.apache.dubbo.common.utils.ReflectUtils

public final class ReflectUtils
extends Object

ReflectUtils

字段概要

字段
修饰符和类型	字段	说明
`static String`	`ARRAY_DESC`
`static String`	`CLASS_DESC`
`static Pattern`	`DESC_PATTERN`
`static String`	`DESC_REGEX`
`static Class<?>[]`	`EMPTY_CLASS_ARRAY`
`static Pattern`	`GETTER_METHOD_DESC_PATTERN`
`static Pattern`	`IS_HAS_CAN_METHOD_DESC_PATTERN`
`static String`	`JAVA_IDENT_REGEX`
`static String`	`JAVA_NAME_REGEX`
`static char`	`JVM_BOOLEAN`	boolean(Z).
`static char`	`JVM_BYTE`	byte(B).
`static char`	`JVM_CHAR`	char(C).
`static char`	`JVM_DOUBLE`	double(D).
`static char`	`JVM_FLOAT`	float(F).
`static char`	`JVM_INT`	int(I).
`static char`	`JVM_LONG`	long(J).
`static char`	`JVM_SHORT`	short(S).
`static char`	`JVM_VOID`	void(V).
`static Pattern`	`METHOD_DESC_PATTERN`
`static String`	`METHOD_DESC_REGEX`
`static Pattern`	`SETTER_METHOD_DESC_PATTERN`

方法概要

所有方法静态方法具体方法已过时的方法
修饰符和类型	方法	说明
`static boolean`	`checkZeroArgConstructor(Class clazz)`
`static Object`	`defaultReturn(Class<?> classType)`
`static Object`	`defaultReturn(Method m)`
`static Class<?>`	`desc2class(String desc)`	desc to class.
`static Class<?>[]`	`desc2classArray(String desc)`	get class array instance.
`static String`	`desc2name(String desc)`	desc to name.
`static Constructor<?>`	`findConstructor(Class<?> clazz, Class<?> paramType)`
`static <T> Set<Class<T>>`	`findHierarchicalTypes(Class<?> sourceClass, Class<T> matchType)`	Find the hierarchical types from the source `class` by specified `type`.
`static Method`	`findMethodByMethodName(Class<?> clazz, String methodName)`	已过时。 Recommend `MethodUtils.findMethod(Class, String, Class[])`
`static Method`	`findMethodByMethodSignature(Class<?> clazz, String methodName, String[] parameterTypes)`	已过时。 Recommend `MethodUtils.findMethod(Class, String, Class[])`
`static Set<ParameterizedType>`	`findParameterizedTypes(Class<?> sourceClass)`	Find the `Set` of `ParameterizedType`
`static Class<?>`	`forName(ClassLoader cl, String name)`
`static Class<?>`	`forName(String name)`
`static Map<String,Field>`	`getBeanPropertyFields(Class cl)`
`static Map<String,Method>`	`getBeanPropertyReadMethods(Class cl)`
`static Class<?>`	`getBoxedClass(Class<?> c)`
`static String`	`getCodeBase(Class<?> cls)`
`static String`	`getDesc(Class<?> c)`	get class desc.
`static String`	`getDesc(Class<?>[] cs)`	get class array desc.
`static String`	`getDesc(Constructor<?> c)`	get constructor desc. "()V", "(Ljava/lang/String;I)V"
`static String`	`getDesc(Method m)`	get method desc.
`static String`	`getDesc(javassist.CtClass c)`	get class desc.
`static String`	`getDesc(javassist.CtConstructor c)`	get constructor desc. "()V", "(Ljava/lang/String;I)V"
`static String`	`getDesc(javassist.CtMethod m)`	get method desc.
`static String[]`	`getDescArray(Method m)`
`static String`	`getDescWithoutMethodName(Method m)`	get method desc.
`static String`	`getDescWithoutMethodName(javassist.CtMethod m)`	get method desc.
`static Object`	`getEmptyObject(Class<?> returnType)`
`static Class<?>`	`getGenericClass(Class<?> cls)`
`static Class<?>`	`getGenericClass(Class<?> cls, int i)`
`static String`	`getName(Class<?> c)`	get name.
`static String`	`getName(Constructor<?> c)`	get constructor name. "()", "(java.lang.String,int)"
`static String`	`getName(Method m)`	get method name.
`static <T> T`	`getProperty(Object bean, String methodName)`	Get the value from the specified bean and its getter method.
`static String`	`getPropertyNameFromBeanReadMethod(Method method)`
`static String`	`getPropertyNameFromBeanWriteMethod(Method method)`
`static Type[]`	`getReturnTypes(Method method)`
`static String`	`getSignature(String methodName, Class<?>[] parameterTypes)`
`static boolean`	`isBeanPropertyReadMethod(Method method)`
`static boolean`	`isBeanPropertyWriteMethod(Method method)`
`static boolean`	`isCompatible(Class<?>[] cs, Object[] os)`	is compatible.
`static boolean`	`isCompatible(Class<?> c, Object o)`	is compatible.
`static boolean`	`isInstance(Object obj, String interfaceClazzName)`	Check if one object is the implementation for a given interface.
`static boolean`	`isJdk(Class clazz)`
`static boolean`	`isPrimitive(Class<?> cls)`
`static boolean`	`isPrimitives(Class<?> cls)`
`static boolean`	`isPublicInstanceField(Field field)`
`static void`	`makeAccessible(Constructor<?> ctor)`	Copy from org.springframework.util.ReflectionUtils.
`static void`	`makeAccessible(Field field)`	Copy from org.springframework.util.ReflectionUtils.
`static void`	`makeAccessible(Method method)`	Copy from org.springframework.util.ReflectionUtils.
`static Class<?>`	`name2class(String name)`	name to class.
`static String`	`name2desc(String name)`	name to desc.
`static Class[]`	`resolveTypes(Object... values)`	Resolve the types of the specified values

从类继承的方法 java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - JVM_VOID
```
public static final char JVM_VOID
```
    void(V).
    
    另请参阅:
    
    常量字段值
  - JVM_BOOLEAN
```
public static final char JVM_BOOLEAN
```
    boolean(Z).
    
    另请参阅:
    
    常量字段值
  - JVM_BYTE
```
public static final char JVM_BYTE
```
    byte(B).
    
    另请参阅:
    
    常量字段值
  - JVM_CHAR
```
public static final char JVM_CHAR
```
    char(C).
    
    另请参阅:
    
    常量字段值
  - JVM_DOUBLE
```
public static final char JVM_DOUBLE
```
    double(D).
    
    另请参阅:
    
    常量字段值
  - JVM_FLOAT
```
public static final char JVM_FLOAT
```
    float(F).
    
    另请参阅:
    
    常量字段值
  - JVM_INT
```
public static final char JVM_INT
```
    int(I).
    
    另请参阅:
    
    常量字段值
  - JVM_LONG
```
public static final char JVM_LONG
```
    long(J).
    
    另请参阅:
    
    常量字段值
  - JVM_SHORT
```
public static final char JVM_SHORT
```
    short(S).
    
    另请参阅:
    
    常量字段值
  - EMPTY_CLASS_ARRAY
```
public static final Class<?>[] EMPTY_CLASS_ARRAY
```
  - JAVA_IDENT_REGEX
```
public static final String JAVA_IDENT_REGEX
```
    另请参阅:
    
    常量字段值
  - JAVA_NAME_REGEX
```
public static final String JAVA_NAME_REGEX
```
    另请参阅:
    
    常量字段值
  - CLASS_DESC
```
public static final String CLASS_DESC
```
    另请参阅:
    
    常量字段值
  - ARRAY_DESC
```
public static final String ARRAY_DESC
```
    另请参阅:
    
    常量字段值
  - DESC_REGEX
```
public static final String DESC_REGEX
```
    另请参阅:
    
    常量字段值
  - DESC_PATTERN
```
public static final Pattern DESC_PATTERN
```
  - METHOD_DESC_REGEX
```
public static final String METHOD_DESC_REGEX
```
    另请参阅:
    
    常量字段值
  - METHOD_DESC_PATTERN
```
public static final Pattern METHOD_DESC_PATTERN
```
  - GETTER_METHOD_DESC_PATTERN
```
public static final Pattern GETTER_METHOD_DESC_PATTERN
```
  - SETTER_METHOD_DESC_PATTERN
```
public static final Pattern SETTER_METHOD_DESC_PATTERN
```
  - IS_HAS_CAN_METHOD_DESC_PATTERN
```
public static final Pattern IS_HAS_CAN_METHOD_DESC_PATTERN
```
- 方法详细资料
  - isPrimitives
```
public static boolean isPrimitives(Class<?> cls)
```
  - isPrimitive
```
public static boolean isPrimitive(Class<?> cls)
```
  - getBoxedClass
```
public static Class<?> getBoxedClass(Class<?> c)
```
  - isCompatible
```
public static boolean isCompatible(Class<?> c,
                                   Object o)
```
    is compatible.
    
    参数:
    
    c - class.
    
    o - instance.
    
    返回:
    
    compatible or not.
  - isCompatible
```
public static boolean isCompatible(Class<?>[] cs,
                                   Object[] os)
```
    is compatible.
    
    参数:
    
    cs - class array.
    
    os - object array.
    
    返回:
    
    compatible or not.
  - getCodeBase
```
public static String getCodeBase(Class<?> cls)
```
  - getName
```
public static String getName(Class<?> c)
```
    get name. java.lang.Object[][].class => "java.lang.Object[][]"
    
    参数:
    
    c - class.
    
    返回:
    
    name.
  - getGenericClass
```
public static Class<?> getGenericClass(Class<?> cls)
```
  - getGenericClass
```
public static Class<?> getGenericClass(Class<?> cls,
                                       int i)
```
  - getName
```
public static String getName(Method m)
```
    get method name. "void do(int)", "void do()", "int do(java.lang.String,boolean)"
    
    参数:
    
    m - method.
    
    返回:
    
    name.
  - getSignature
```
public static String getSignature(String methodName,
                                  Class<?>[] parameterTypes)
```
  - getName
```
public static String getName(Constructor<?> c)
```
    get constructor name. "()", "(java.lang.String,int)"
    
    参数:
    
    c - constructor.
    
    返回:
    
    name.
  - getDesc
```
public static String getDesc(Class<?> c)
```
    get class desc. boolean[].class => "[Z" Object.class => "Ljava/lang/Object;"
    
    参数:
    
    c - class.
    
    返回:
    
    desc.
    
    抛出:
    
    javassist.NotFoundException
  - getDesc
```
public static String getDesc(Class<?>[] cs)
```
    get class array desc. [int.class, boolean[].class, Object.class] => "I[ZLjava/lang/Object;"
    
    参数:
    
    cs - class array.
    
    返回:
    
    desc.
    
    抛出:
    
    javassist.NotFoundException
  - getDesc
```
public static String getDesc(Method m)
```
    get method desc. int do(int arg1) => "do(I)I" void do(String arg1,boolean arg2) => "do(Ljava/lang/String;Z)V"
    
    参数:
    
    m - method.
    
    返回:
    
    desc.
  - getDescArray
```
public static String[] getDescArray(Method m)
```
  - getDesc
```
public static String getDesc(Constructor<?> c)
```
    get constructor desc. "()V", "(Ljava/lang/String;I)V"
    
    参数:
    
    c - constructor.
    
    返回:
    
    desc
  - getDescWithoutMethodName
```
public static String getDescWithoutMethodName(Method m)
```
    get method desc. "(I)I", "()V", "(Ljava/lang/String;Z)V"
    
    参数:
    
    m - method.
    
    返回:
    
    desc.
  - getDesc
```
public static String getDesc(javassist.CtClass c)
                      throws javassist.NotFoundException
```
    get class desc. Object.class => "Ljava/lang/Object;" boolean[].class => "[Z"
    
    参数:
    
    c - class.
    
    返回:
    
    desc.
    
    抛出:
    
    javassist.NotFoundException
  - getDesc
```
public static String getDesc(javassist.CtMethod m)
                      throws javassist.NotFoundException
```
    get method desc. "do(I)I", "do()V", "do(Ljava/lang/String;Z)V"
    
    参数:
    
    m - method.
    
    返回:
    
    desc.
    
    抛出:
    
    javassist.NotFoundException
  - getDesc
```
public static String getDesc(javassist.CtConstructor c)
                      throws javassist.NotFoundException
```
    get constructor desc. "()V", "(Ljava/lang/String;I)V"
    
    参数:
    
    c - constructor.
    
    返回:
    
    desc
    
    抛出:
    
    javassist.NotFoundException
  - getDescWithoutMethodName
```
public static String getDescWithoutMethodName(javassist.CtMethod m)
                                       throws javassist.NotFoundException
```
    get method desc. "(I)I", "()V", "(Ljava/lang/String;Z)V".
    
    参数:
    
    m - method.
    
    返回:
    
    desc.
    
    抛出:
    
    javassist.NotFoundException
  - name2desc
```
public static String name2desc(String name)
```
    name to desc. java.util.Map[][] => "[[Ljava/util/Map;"
    
    参数:
    
    name - name.
    
    返回:
    
    desc.
  - desc2name
```
public static String desc2name(String desc)
```
    desc to name. "[[I" => "int[][]"
    
    参数:
    
    desc - desc.
    
    返回:
    
    name.
  - forName
```
public static Class<?> forName(String name)
```
  - forName
```
public static Class<?> forName(ClassLoader cl,
                               String name)
```
  - name2class
```
public static Class<?> name2class(String name)
                           throws ClassNotFoundException
```
    name to class. "boolean" => boolean.class "java.util.Map[][]" => java.util.Map[][].class
    
    参数:
    
    name - name.
    
    返回:
    
    Class instance.
    
    抛出:
    
    ClassNotFoundException
  - desc2class
```
public static Class<?> desc2class(String desc)
                           throws ClassNotFoundException
```
    desc to class. "[Z" => boolean[].class "[[Ljava/util/Map;" => java.util.Map[][].class
    
    参数:
    
    desc - desc.
    
    返回:
    
    Class instance.
    
    抛出:
    
    ClassNotFoundException
  - desc2classArray
```
public static Class<?>[] desc2classArray(String desc)
                                  throws ClassNotFoundException
```
    get class array instance.
    
    参数:
    
    desc - desc.
    
    返回:
    
    Class class array.
    
    抛出:
    
    ClassNotFoundException
  - findMethodByMethodSignature
```
@Deprecated
public static Method findMethodByMethodSignature(Class<?> clazz,
                                                 String methodName,
                                                 String[] parameterTypes)
                                          throws NoSuchMethodException,
                                                 ClassNotFoundException
```
    已过时。
    Recommend MethodUtils.findMethod(Class, String, Class[])
    
    Find method from method signature
    
    参数:
    
    clazz - Target class to find method
    
    methodName - Method signature, e.g.: method1(int, String). It is allowed to provide method name only, e.g.: method2
    
    返回:
    
    target method
    
    抛出:
    
    NoSuchMethodException
    
    ClassNotFoundException
    
    IllegalStateException - when multiple methods are found (overridden method when parameter info is not provided)
  - findMethodByMethodName
```
@Deprecated
public static Method findMethodByMethodName(Class<?> clazz,
                                            String methodName)
                                     throws NoSuchMethodException,
                                            ClassNotFoundException
```
    已过时。
    Recommend MethodUtils.findMethod(Class, String, Class[])
    
    参数:
    
    clazz - Target class to find method
    
    methodName - Method signature, e.g.: method1(int, String). It is allowed to provide method name only, e.g.: method2
    
    返回:
    
    target method
    
    抛出:
    
    NoSuchMethodException
    
    ClassNotFoundException
    
    IllegalStateException - when multiple methods are found (overridden method when parameter info is not provided)
  - findConstructor
```
public static Constructor<?> findConstructor(Class<?> clazz,
                                             Class<?> paramType)
                                      throws NoSuchMethodException
```
    抛出:
    
    NoSuchMethodException
  - isInstance
```
public static boolean isInstance(Object obj,
                                 String interfaceClazzName)
```
    Check if one object is the implementation for a given interface.
    This method will not trigger classloading for the given interface, therefore it will not lead to error when the given interface is not visible by the classloader
    
    参数:
    
    obj - Object to examine
    
    interfaceClazzName - The given interface
    
    返回:
    
    true if the object implements the given interface, otherwise return false
  - getEmptyObject
```
public static Object getEmptyObject(Class<?> returnType)
```
  - defaultReturn
```
public static Object defaultReturn(Method m)
```
  - defaultReturn
```
public static Object defaultReturn(Class<?> classType)
```
  - isBeanPropertyReadMethod
```
public static boolean isBeanPropertyReadMethod(Method method)
```
  - getPropertyNameFromBeanReadMethod
```
public static String getPropertyNameFromBeanReadMethod(Method method)
```
  - isBeanPropertyWriteMethod
```
public static boolean isBeanPropertyWriteMethod(Method method)
```
  - getPropertyNameFromBeanWriteMethod
```
public static String getPropertyNameFromBeanWriteMethod(Method method)
```
  - isPublicInstanceField
```
public static boolean isPublicInstanceField(Field field)
```
  - getBeanPropertyFields
```
public static Map<String,Field> getBeanPropertyFields(Class cl)
```
  - getBeanPropertyReadMethods
```
public static Map<String,Method> getBeanPropertyReadMethods(Class cl)
```
  - getReturnTypes
```
public static Type[] getReturnTypes(Method method)
```
  - findParameterizedTypes
```
public static Set<ParameterizedType> findParameterizedTypes(Class<?> sourceClass)
```
    Find the Set of ParameterizedType
    
    参数:
    
    sourceClass - the source class
    
    返回:
    
    non-null read-only Set
    
    从以下版本开始:
    
    2.7.5
  - findHierarchicalTypes
```
public static <T> Set<Class<T>> findHierarchicalTypes(Class<?> sourceClass,
                                                      Class<T> matchType)
```
    Find the hierarchical types from the source class by specified type.
    
    类型参数:
    
    T - the type to match
    
    参数:
    
    sourceClass - the source class
    
    matchType - the type to match
    
    返回:
    
    non-null read-only Set
    
    从以下版本开始:
    
    2.7.5
  - getProperty
```
public static <T> T getProperty(Object bean,
                                String methodName)
```
    Get the value from the specified bean and its getter method.
    
    类型参数:
    
    T - the type of property value
    
    参数:
    
    bean - the bean instance
    
    methodName - the name of getter
    
    返回:
    
    从以下版本开始:
    
    2.7.5
  - resolveTypes
```
public static Class[] resolveTypes(Object... values)
```
    Resolve the types of the specified values
    
    参数:
    
    values - the values
    
    返回:
    
    If can't be resolved, return empty class array
    
    从以下版本开始:
    
    2.7.6
  - makeAccessible
```
public static void makeAccessible(Method method)
```
    Copy from org.springframework.util.ReflectionUtils. Make the given method accessible, explicitly setting it accessible if necessary. The setAccessible(true) method is only called when actually necessary, to avoid unnecessary conflicts with a JVM SecurityManager (if active).
    
    参数:
    
    method - the method to make accessible
    
    另请参阅:
    
    Method.setAccessible(boolean)
  - makeAccessible
```
public static void makeAccessible(Field field)
```
    Copy from org.springframework.util.ReflectionUtils. Make the given field accessible, explicitly setting it accessible if necessary. The setAccessible(true) method is only called when actually necessary, to avoid unnecessary conflicts with a JVM SecurityManager (if active).
    
    参数:
    
    field - the field to make accessible
    
    另请参阅:
    
    Field.setAccessible(boolean)
  - makeAccessible
```
public static void makeAccessible(Constructor<?> ctor)
```
    Copy from org.springframework.util.ReflectionUtils. Make the given constructor accessible, explicitly setting it accessible if necessary. The setAccessible(true) method is only called when actually necessary, to avoid unnecessary conflicts with a JVM SecurityManager (if active).
    
    参数:
    
    ctor - the constructor to make accessible
    
    另请参阅:
    
    Constructor.setAccessible(boolean)
  - checkZeroArgConstructor
```
public static boolean checkZeroArgConstructor(Class clazz)
```
  - isJdk
```
public static boolean isJdk(Class clazz)
```

类 ReflectUtils

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

JVM_VOID

JVM_BOOLEAN

JVM_BYTE

JVM_CHAR

JVM_DOUBLE

JVM_FLOAT

JVM_INT

JVM_LONG

JVM_SHORT

EMPTY_CLASS_ARRAY

JAVA_IDENT_REGEX

JAVA_NAME_REGEX

CLASS_DESC

ARRAY_DESC

DESC_REGEX

DESC_PATTERN

METHOD_DESC_REGEX

METHOD_DESC_PATTERN

GETTER_METHOD_DESC_PATTERN

SETTER_METHOD_DESC_PATTERN

IS_HAS_CAN_METHOD_DESC_PATTERN

方法详细资料

isPrimitives

isPrimitive

getBoxedClass

isCompatible

isCompatible

getCodeBase

getName

getGenericClass

getGenericClass

getName

getSignature

getName

getDesc

getDesc

getDesc

getDescArray

getDesc

getDescWithoutMethodName

getDesc

getDesc

getDesc

getDescWithoutMethodName

name2desc

desc2name

forName

forName

name2class

desc2class

desc2classArray

findMethodByMethodSignature

findMethodByMethodName

findConstructor

isInstance

getEmptyObject

defaultReturn

defaultReturn

isBeanPropertyReadMethod

getPropertyNameFromBeanReadMethod

isBeanPropertyWriteMethod

getPropertyNameFromBeanWriteMethod

isPublicInstanceField

getBeanPropertyFields

getBeanPropertyReadMethods

getReturnTypes

findParameterizedTypes

findHierarchicalTypes

getProperty

resolveTypes

makeAccessible

makeAccessible

makeAccessible

checkZeroArgConstructor

isJdk