org.dromara.mendmix.common.util

类 ReflectUtils

java.lang.Object

org.dromara.mendmix.common.util.ReflectUtils

public class ReflectUtils
extends Object

反射工具

作者:

vakin

字段概要

字段

限定符和类型	字段和说明
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

限定符和类型	方法和说明
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 Method	findMethodByMethodName(Class<?> clazz, String methodName)
static Method	findMethodByMethodSignature(Class<?> clazz, String methodName, String[] parameterTypes) 根据方法签名从类中找出方法。
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 Class<?>	getClass(Type type)
static Type[]	getClassGenericTypes(Class<?> clazz)
static ClassLoader	getClassLoader()
static ClassLoader	getClassLoader(Class<?> cls)
static String	getClassName(Type type)
static String	getCodeBase(Class<?> cls)
static String	getDesc(Class<?> c) get class desc. boolean[].class => "[Z" Object.class => "Ljava/lang/Object;"
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(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	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"
static String	getDescWithoutMethodName(javassist.CtMethod m) get method desc.
static String	getDescWithoutMethodName(Method m) get method desc.
static Object	getEmptyObject(Class<?> returnType)
static Object	getEnumConstant(Class<?> clazz, String name)
static Class<?>	getFieldClass(Class<?> clazz, String name)
static Class<?>	getGenericClass(Class<?> cls)
static Class<?>	getGenericClass(Class<?> cls, int i)
static Class<?>	getMethodReturnType(Class<?> clazz, String name)
static String	getName(Class<?> c) get name. java.lang.Object[][].class => "java.lang.Object[][]"
static String	getName(Constructor<?> c) get constructor name. "()", "(java.lang.String,int)"
static String	getName(Method m) get method name.
static Object	getObjectValue(Object target, String propertyName) 获取指定某个对象指定属性的值
static String	getPropertyNameFromBeanReadMethod(Method method)
static String	getPropertyNameFromBeanWriteMethod(Method method)
static String	getSignature(String methodName, Class<?>[] parameterTypes)
static boolean	hasDefaultConstructor(Class<?> clazz)
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) 检查对象是否是指定接口的实现。
static boolean	isPrimitive(Class<?> cls)
static boolean	isPrimitives(Class<?> cls)
static boolean	isPublicInstanceField(Field field)
static Class<?>	name2class(String name) name to class.
static String	name2desc(String name) name to desc. java.util.Map[][] => "[[Ljava/util/Map;"
static Object	newInstance(Type type)

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

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.

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)

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

public static Method findMethodByMethodSignature(Class<?> clazz,
                                                 String methodName,
                                                 String[] parameterTypes)
                                          throws NoSuchMethodException,
                                                 ClassNotFoundException

根据方法签名从类中找出方法。

参数:

clazz - 查找的类。

methodName - 方法签名，形如method1(int, String)。也允许只给方法名不参数只有方法名，形如method2。

返回:

返回查找到的方法。

抛出:

NoSuchMethodException

ClassNotFoundException

IllegalStateException - 给定的方法签名找到多个方法（方法签名中没有指定参数，又有有重载的方法的情况）

findMethodByMethodName

public static Method findMethodByMethodName(Class<?> clazz,
                                            String methodName)
                                     throws NoSuchMethodException,
                                            ClassNotFoundException

抛出:

NoSuchMethodException

ClassNotFoundException

findConstructor

public static Constructor<?> findConstructor(Class<?> clazz,
                                             Class<?> paramType)
                                      throws NoSuchMethodException

抛出:

NoSuchMethodException

isInstance

public static boolean isInstance(Object obj,
                                 String interfaceClazzName)

检查对象是否是指定接口的实现。

不会触发到指定接口的Class，所以如果ClassLoader中没有指定接口类时，也不会出错。

参数:

obj - 要检查的对象

interfaceClazzName - 指定的接口名

返回:

返回true，如果对象实现了指定接口；否则返回false。

getEmptyObject

public static Object getEmptyObject(Class<?> returnType)

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)

getObjectValue

public static Object getObjectValue(Object target,
                                    String propertyName)

获取指定某个对象指定属性的值

参数:

target -

propertyName -

抛出:

SecurityException

NoSuchFieldException

getClassName

public static String getClassName(Type type)

getClass

public static Class<?> getClass(Type type)
                         throws ClassNotFoundException

抛出:

ClassNotFoundException

newInstance

public static Object newInstance(Type type)
                          throws ClassNotFoundException,
                                 InstantiationException,
                                 IllegalAccessException

抛出:

ClassNotFoundException

InstantiationException

IllegalAccessException

getClassGenericTypes

public static Type[] getClassGenericTypes(Class<?> clazz)

hasDefaultConstructor

public static boolean hasDefaultConstructor(Class<?> clazz)
                                     throws SecurityException

抛出:

SecurityException

getFieldClass

public static Class<?> getFieldClass(Class<?> clazz,
                                     String name)

getMethodReturnType

public static Class<?> getMethodReturnType(Class<?> clazz,
                                           String name)

getEnumConstant

public static Object getEnumConstant(Class<?> clazz,
                                     String name)

getClassLoader

public static ClassLoader getClassLoader(Class<?> cls)

getClassLoader

public static ClassLoader getClassLoader()