com.virjar.vtoolkit

类 ReflectUtil

java.lang.Object

com.virjar.vtoolkit.ReflectUtil

public class ReflectUtil
extends Object

Created by virjar on 2018/8/28.
反射工具,可以在没有xposed的环境下，安全运行

字段概要

字段

限定符和类型	字段和说明
static Class<?>[]	EMPTY_CLASS_ARRAY
static char	INNER_CLASS_SEPARATOR_CHAR The inner class separator character: '$' == 36.
static char	PACKAGE_SEPARATOR_CHAR The package separator character: '.' == 46.

构造器概要

构造器

构造器和说明
ReflectUtil()

方法概要

限定符和类型	方法和说明
static Object	callMethod(Object obj, String methodName, Class<?>[] parameterTypes, Object... args) Calls an instance or static method of the given object.
static Object	callMethod(Object obj, String methodName, Object... args) Calls an instance or static method of the given object.
static Object	callStaticMethod(Class<?> clazz, String methodName, Class<?>[] parameterTypes, Object... args) Calls a static method of the given class.
static Object	callStaticMethod(Class<?> clazz, String methodName, Object... args) Calls a static method of the given class.
static int	compareParameterTypes(Class<?>[] left, Class<?>[] right, Class<?>[] actual)
static String	deleteWhitespace(String str) Deletes all whitespaces from a String as defined by Character.isWhitespace(char).
static Class<?>	findClass(String className, ClassLoader classLoader) Look up a class with the specified class loader.
static Class<?>	findClassIfExists(String className, ClassLoader classLoader) Look up and return a class if it exists.
static Constructor<?>	findConstructorExact(Class<?> clazz, Class<?>... parameterTypes) Look up a constructor of a class and set it to accessible.
static Constructor<?>	findConstructorExact(Class<?> clazz, Object... parameterTypes) Look up a constructor of a class and set it to accessible.
static Constructor<?>	findConstructorExact(String className, ClassLoader classLoader, Object... parameterTypes) Look up a constructor of a class and set it to accessible.
static Constructor<?>	findConstructorExactIfExists(Class<?> clazz, Object... parameterTypes) Look up and return a constructor if it exists.
static Constructor<?>	findConstructorExactIfExists(String className, ClassLoader classLoader, Object... parameterTypes) Look up and return a constructor if it exists.
static Field	findField(Class<?> clazz, String fieldName) Look up a field in a class and set it to accessible.
static Field	findFieldIfExists(Class<?> clazz, String fieldName) Look up and return a field if it exists.
static Field	findFirstFieldByExactType(Class<?> clazz, Class<?> type) Returns the first field of the given type in a class.
static Method	findMethodBestMatch(Class<?> clazz, String methodName, Class<?>... parameterTypes) Look up a method in a class and set it to accessible.
static Method	findMethodBestMatch(Class<?> clazz, String methodName, Class<?>[] parameterTypes, Object[] args) Look up a method in a class and set it to accessible.
static Method	findMethodBestMatch(Class<?> clazz, String methodName, Object... args) Look up a method in a class and set it to accessible.
static Method	findMethodExact(Class<?> clazz, String methodName, Class<?>... parameterTypes) Look up a method in a class and set it to accessible.
static Method	findMethodExact(Class<?> clazz, String methodName, Object... parameterTypes) Look up a method in a class and set it to accessible.
static Method	findMethodExact(String className, ClassLoader classLoader, String methodName, Object... parameterTypes) Look up a method in a class and set it to accessible.
static Method	findMethodExactIfExists(Class<?> clazz, String methodName, Object... parameterTypes) Look up and return a method if it exists.
static Method	findMethodExactIfExists(String className, ClassLoader classLoader, String methodName, Object... parameterTypes) Look up and return a method if it exists.
static Method[]	findMethodsByExactParameters(Class<?> clazz, Class<?> returnType, Class<?>... parameterTypes) Returns an array of all methods declared/overridden in a class with the specified parameter types.
static boolean	getBooleanField(Object obj, String fieldName) Returns the value of a boolean field in the given object instance.
static byte	getByteField(Object obj, String fieldName) Returns the value of a byte field in the given object instance.
static char	getCharField(Object obj, String fieldName) Returns the value of a char field in the given object instance.
static Class<?>	getClass(ClassLoader classLoader, String className, boolean initialize) Returns the class represented by className using the classLoader.
static Class<?>[]	getClassesAsArray(Class<?>... clazzes) Returns an array of the given classes.
static double	getDoubleField(Object obj, String fieldName) Returns the value of a double field in the given object instance.
static <T> T	getFieldValue(Object object, String fieldName)
static float	getFloatField(Object obj, String fieldName) Returns the value of a float field in the given object instance.
static int	getIntField(Object obj, String fieldName) Returns the value of an int field in the given object instance.
static int	getLength(Object array)
static long	getLongField(Object obj, String fieldName) Returns the value of a long field in the given object instance.
static Class<?>[]	getParameterTypes(Object... args) Returns an array with the classes of the given objects.
static short	getShortField(Object obj, String fieldName) Returns the value of a short field in the given object instance.
static <T> T	getStaticFiled(Class<?> clazz, String filedName)
static boolean	isAssignable(Class<?>[] classArray, Class<?>[] toClassArray, boolean autoboxing)
static boolean	isAssignable(Class<?> cls, Class<?> toClass, boolean autoboxing)
static boolean	isSameLength(Object[] array1, Object[] array2)
static Class<?>	primitiveToWrapper(Class<?> cls)
static void	setFieldValue(Object object, String fieldName, Object value)
static Class<?>	wrapperToPrimitive(Class<?> cls)

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

PACKAGE_SEPARATOR_CHAR

public static final char PACKAGE_SEPARATOR_CHAR

The package separator character: '.' == 46.

另请参阅:

常量字段值

INNER_CLASS_SEPARATOR_CHAR

public static final char INNER_CLASS_SEPARATOR_CHAR

The inner class separator character: '$' == 36.

另请参阅:

常量字段值

EMPTY_CLASS_ARRAY

public static final Class<?>[] EMPTY_CLASS_ARRAY

构造器详细资料

ReflectUtil

public ReflectUtil()

方法详细资料

getBooleanField

public static boolean getBooleanField(Object obj,
                                      String fieldName)

Returns the value of a boolean field in the given object instance. A class reference is not sufficient! See also findField(java.lang.Class<?>, java.lang.String).

getByteField

public static byte getByteField(Object obj,
                                String fieldName)

Returns the value of a byte field in the given object instance. A class reference is not sufficient! See also findField(java.lang.Class<?>, java.lang.String).

getCharField

public static char getCharField(Object obj,
                                String fieldName)

Returns the value of a char field in the given object instance. A class reference is not sufficient! See also findField(java.lang.Class<?>, java.lang.String).

getDoubleField

public static double getDoubleField(Object obj,
                                    String fieldName)

Returns the value of a double field in the given object instance. A class reference is not sufficient! See also findField(java.lang.Class<?>, java.lang.String).

getFloatField

public static float getFloatField(Object obj,
                                  String fieldName)

Returns the value of a float field in the given object instance. A class reference is not sufficient! See also findField(java.lang.Class<?>, java.lang.String).

getIntField

public static int getIntField(Object obj,
                              String fieldName)

Returns the value of an int field in the given object instance. A class reference is not sufficient! See also findField(java.lang.Class<?>, java.lang.String).

getLongField

public static long getLongField(Object obj,
                                String fieldName)

Returns the value of a long field in the given object instance. A class reference is not sufficient! See also findField(java.lang.Class<?>, java.lang.String).

getShortField

public static short getShortField(Object obj,
                                  String fieldName)

Returns the value of a short field in the given object instance. A class reference is not sufficient! See also findField(java.lang.Class<?>, java.lang.String).

setFieldValue

public static void setFieldValue(Object object,
                                 String fieldName,
                                 Object value)

getFieldValue

public static <T> T getFieldValue(Object object,
                                  String fieldName)

getStaticFiled

public static <T> T getStaticFiled(Class<?> clazz,
                                   String filedName)

callMethod

public static Object callMethod(Object obj,
                                String methodName,
                                Object... args)

Calls an instance or static method of the given object. The method is resolved using findMethodBestMatch(Class, String, Object...).

参数:

obj - The object instance. A class reference is not sufficient!

methodName - The method name.

args - The arguments for the method call.

抛出:

NoSuchMethodError - In case no suitable method was found.

callMethod

public static Object callMethod(Object obj,
                                String methodName,
                                Class<?>[] parameterTypes,
                                Object... args)

Calls an instance or static method of the given object. See callMethod(Object, String, Object...).

This variant allows you to specify parameter types, which can help in case there are multiple methods with the same name, especially if you call it with null parameters.

callStaticMethod

public static Object callStaticMethod(Class<?> clazz,
                                      String methodName,
                                      Object... args)

Calls a static method of the given class. The method is resolved using findMethodBestMatch(Class, String, Object...).

参数:

clazz - The class reference.

methodName - The method name.

args - The arguments for the method call.

抛出:

NoSuchMethodError - In case no suitable method was found.

callStaticMethod

public static Object callStaticMethod(Class<?> clazz,
                                      String methodName,
                                      Class<?>[] parameterTypes,
                                      Object... args)

Calls a static method of the given class. See callStaticMethod(Class, String, Object...).

This variant allows you to specify parameter types, which can help in case there are multiple methods with the same name, especially if you call it with null parameters.

findMethodExact

public static Method findMethodExact(Class<?> clazz,
                                     String methodName,
                                     Object... parameterTypes)

Look up a method in a class and set it to accessible. See findMethodExact(String, ClassLoader, String, Object...) for details.

findMethodExactIfExists

public static Method findMethodExactIfExists(Class<?> clazz,
                                             String methodName,
                                             Object... parameterTypes)

Look up and return a method if it exists. See findMethodExactIfExists(String, ClassLoader, String, Object...) for details.

findMethodExact

public static Method findMethodExact(String className,
                                     ClassLoader classLoader,
                                     String methodName,
                                     Object... parameterTypes)

Look up a method in a class and set it to accessible. The method must be declared or overridden in the given class.

the method and parameter type resolution.

参数:

className - The name of the class which implements the method.

classLoader - The class loader for resolving the target and parameter classes.

methodName - The target method name.

parameterTypes - The parameter types of the target method.

返回:

A reference to the method.

抛出:

NoSuchMethodError - In case the method was not found.

findMethodExactIfExists

public static Method findMethodExactIfExists(String className,
                                             ClassLoader classLoader,
                                             String methodName,
                                             Object... parameterTypes)

Look up and return a method if it exists. Like findMethodExact(String, ClassLoader, String, Object...), but doesn't throw an exception if the method doesn't exist.

参数:

className - The name of the class which implements the method.

classLoader - The class loader for resolving the target and parameter classes.

methodName - The target method name.

parameterTypes - The parameter types of the target method.

返回:

A reference to the method, or null if it doesn't exist.

findMethodExact

public static Method findMethodExact(Class<?> clazz,
                                     String methodName,
                                     Class<?>... parameterTypes)

Look up a method in a class and set it to accessible. See findMethodExact(String, ClassLoader, String, Object...) for details.

This variant requires that you already have reference to all the parameter types.

findMethodsByExactParameters

public static Method[] findMethodsByExactParameters(Class<?> clazz,
                                                    Class<?> returnType,
                                                    Class<?>... parameterTypes)

Returns an array of all methods declared/overridden in a class with the specified parameter types.

The return type is optional, it will not be compared if it is null. Use void.class if you want to search for methods returning nothing.

参数:

clazz - The class to look in.

returnType - The return type, or null (see above).

parameterTypes - The parameter types.

返回:

An array with matching methods, all set to accessible already.

findMethodBestMatch

public static Method findMethodBestMatch(Class<?> clazz,
                                         String methodName,
                                         Class<?>... parameterTypes)

Look up a method in a class and set it to accessible.

This does'nt only look for exact matches, but for the best match. All considered candidates must be compatible with the given parameter types, i.e. the parameters must be assignable to the method's formal parameters. Inherited methods are considered here.

参数:

clazz - The class which declares, inherits or overrides the method.

methodName - The method name.

parameterTypes - The types of the method's parameters.

返回:

A reference to the best-matching method.

抛出:

NoSuchMethodError - In case no suitable method was found.

findMethodBestMatch

public static Method findMethodBestMatch(Class<?> clazz,
                                         String methodName,
                                         Object... args)

Look up a method in a class and set it to accessible.

See findMethodBestMatch(Class, String, Class...) for details. This variant determines the parameter types from the classes of the given objects.

findMethodBestMatch

public static Method findMethodBestMatch(Class<?> clazz,
                                         String methodName,
                                         Class<?>[] parameterTypes,
                                         Object[] args)

Look up a method in a class and set it to accessible.

See findMethodBestMatch(Class, String, Class...) for details. This variant determines the parameter types from the classes of the given objects. For any item that is null, the type is taken from parameterTypes instead.

getParameterTypes

public static Class<?>[] getParameterTypes(Object... args)

Returns an array with the classes of the given objects.

getClassesAsArray

public static Class<?>[] getClassesAsArray(Class<?>... clazzes)

Returns an array of the given classes.

findConstructorExact

public static Constructor<?> findConstructorExact(Class<?> clazz,
                                                  Object... parameterTypes)

Look up a constructor of a class and set it to accessible. See findMethodExact(String, ClassLoader, String, Object...) for details.

findConstructorExactIfExists

public static Constructor<?> findConstructorExactIfExists(Class<?> clazz,
                                                          Object... parameterTypes)

Look up and return a constructor if it exists. See findMethodExactIfExists(String, ClassLoader, String, Object...) for details.

findConstructorExact

public static Constructor<?> findConstructorExact(String className,
                                                  ClassLoader classLoader,
                                                  Object... parameterTypes)

Look up a constructor of a class and set it to accessible. See findMethodExact(String, ClassLoader, String, Object...) for details.

findConstructorExactIfExists

public static Constructor<?> findConstructorExactIfExists(String className,
                                                          ClassLoader classLoader,
                                                          Object... parameterTypes)

Look up and return a constructor if it exists. See findMethodExactIfExists(String, ClassLoader, String, Object...) for details.

findConstructorExact

public static Constructor<?> findConstructorExact(Class<?> clazz,
                                                  Class<?>... parameterTypes)

Look up a constructor of a class and set it to accessible. See findMethodExact(String, ClassLoader, String, Object...) for details.

findClass

public static Class<?> findClass(String className,
                                 ClassLoader classLoader)

Look up a class with the specified class loader.

There are various allowed syntaxes for the class name, but it's recommended to use one of

these:

• java.lang.String
• java.lang.String[] (array)
• android.app.ActivityThread.ResourcesKey
• android.app.ActivityThread$ResourcesKey

参数:

className - The class name in one of the formats mentioned above.

classLoader - The class loader, or null for the boot class loader.

返回:

A reference to the class.

findClassIfExists

public static Class<?> findClassIfExists(String className,
                                         ClassLoader classLoader)

Look up and return a class if it exists. Like findClass(java.lang.String, java.lang.ClassLoader), but doesn't throw an exception if the class doesn't exist.

参数:

className - The class name.

classLoader - The class loader, or null for the boot class loader.

返回:

A reference to the class, or null if it doesn't exist.

findField

public static Field findField(Class<?> clazz,
                              String fieldName)

Look up a field in a class and set it to accessible.

参数:

clazz - The class which either declares or inherits the field.

fieldName - The field name.

返回:

A reference to the field.

抛出:

NoSuchFieldError - In case the field was not found.

findFieldIfExists

public static Field findFieldIfExists(Class<?> clazz,
                                      String fieldName)

Look up and return a field if it exists. Like findField(java.lang.Class<?>, java.lang.String), but doesn't throw an exception if the field doesn't exist.

参数:

clazz - The class which either declares or inherits the field.

fieldName - The field name.

返回:

A reference to the field, or null if it doesn't exist.

findFirstFieldByExactType

public static Field findFirstFieldByExactType(Class<?> clazz,
                                              Class<?> type)

Returns the first field of the given type in a class. Might be useful for Proguard'ed classes to identify fields with unique types.

参数:

clazz - The class which either declares or inherits the field.

type - The type of the field.

返回:

A reference to the first field of the given type.

抛出:

NoSuchFieldError - In case no matching field was not found.

deleteWhitespace

public static String deleteWhitespace(String str)

Deletes all whitespaces from a String as defined by Character.isWhitespace(char).

 StringUtils.deleteWhitespace(null)         = null
 StringUtils.deleteWhitespace("")           = ""
 StringUtils.deleteWhitespace("abc")        = "abc"
 StringUtils.deleteWhitespace("   ab  c  ") = "abc"
 

参数:

str - the String to delete whitespace from, may be null

返回:

the String without whitespaces, null if null String input

getClass

public static Class<?> getClass(ClassLoader classLoader,
                                String className,
                                boolean initialize)
                         throws ClassNotFoundException

Returns the class represented by className using the classLoader. This implementation supports the syntaxes "java.util.Map.Entry[]", "java.util.Map$Entry[]", "[Ljava.util.Map.Entry;", and "[Ljava.util.Map$Entry;".

参数:

classLoader - the class loader to use to load the class

className - the class name

initialize - whether the class must be initialized

返回:

the class represented by className using the classLoader

抛出:

ClassNotFoundException - if the class is not found

isSameLength

public static boolean isSameLength(Object[] array1,
                                   Object[] array2)

getLength

public static int getLength(Object array)

isAssignable

public static boolean isAssignable(Class<?>[] classArray,
                                   Class<?>[] toClassArray,
                                   boolean autoboxing)

wrapperToPrimitive

public static Class<?> wrapperToPrimitive(Class<?> cls)

primitiveToWrapper

public static Class<?> primitiveToWrapper(Class<?> cls)

isAssignable

public static boolean isAssignable(Class<?> cls,
                                   Class<?> toClass,
                                   boolean autoboxing)

compareParameterTypes

public static int compareParameterTypes(Class<?>[] left,
                                        Class<?>[] right,
                                        Class<?>[] actual)