cn.xxywithpq.utils

类 ReflectionUtils

java.lang.Object

cn.xxywithpq.utils.ReflectionUtils

public class ReflectionUtils
extends Object

反射的Utils函数集合. 提供访问私有变量,获取泛型类型Class,提取集合中元素的属性等Utils函数.

作者:

panqian

方法概要

限定符和类型	方法和说明
static List	fetchElementPropertyToList(Collection collection, String propertyName) 提取集合中的对象的属性,组合成List.
static Type[]	getActualTypeArguments(Type t) 查找Type中的参数泛型
static List<Method>	getAllDeclaredMethods(Class clazz) 循环向上转型,获取类的所有DeclaredMethods.除了Object
protected static Field	getDeclaredField(Class clazz, String fieldName) 循环向上转型,获取类的DeclaredField.
protected static Field	getDeclaredField(Object object, String fieldName) 循环向上转型,获取对象的DeclaredField.
static Object	getFieldValue(Field field, Object object) 直接读取对象属性值,无视private/protected修饰符,不经过getter函数.
static Object	getFieldValue(Object object, String fieldName) 直接读取对象属性值,无视private/protected修饰符,不经过getter函数.
static String	getModifier(Method m)
static Class	getSuperClassGenricType(Class clazz) 通过反射,获得定义Class时声明的父类的泛型参数的类型.
static Class	getSuperClassGenricType(Class clazz, int index) 通过反射,获得定义Class时声明的父类的泛型参数的类型.
static Field	getValueFromDeclaredMethods(Class clazz) 循环向上转型,获取类的DeclaredField.
protected static void	makeAccessible(Field field) 强制转换fileld可访问.
static void	setFieldValue(Object object, String fieldName, Object value) 直接设置对象属性值,无视private/protected修饰符,不经过setter函数.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

方法详细资料

getFieldValue

public static Object getFieldValue(Object object,
                                   String fieldName)

直接读取对象属性值,无视private/protected修饰符,不经过getter函数.

getFieldValue

public static Object getFieldValue(Field field,
                                   Object object)

直接读取对象属性值,无视private/protected修饰符,不经过getter函数.

setFieldValue

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

直接设置对象属性值,无视private/protected修饰符,不经过setter函数.

getDeclaredField

protected static Field getDeclaredField(Object object,
                                        String fieldName)

循环向上转型,获取对象的DeclaredField.

getValueFromDeclaredMethods

public static Field getValueFromDeclaredMethods(Class clazz)

循环向上转型,获取类的DeclaredField.

getModifier

public static String getModifier(Method m)

getDeclaredField

protected static Field getDeclaredField(Class clazz,
                                        String fieldName)

循环向上转型,获取类的DeclaredField.

getAllDeclaredMethods

public static List<Method> getAllDeclaredMethods(Class clazz)

循环向上转型,获取类的所有DeclaredMethods.除了Object

makeAccessible

protected static void makeAccessible(Field field)

强制转换fileld可访问.

getSuperClassGenricType

public static Class getSuperClassGenricType(Class clazz)

通过反射,获得定义Class时声明的父类的泛型参数的类型. 如public UserDao extends HibernateDao

参数:

clazz - The class to introspect

返回:

the first generic declaration, or Object.class if cannot be determined

getSuperClassGenricType

public static Class getSuperClassGenricType(Class clazz,
                                            int index)

通过反射,获得定义Class时声明的父类的泛型参数的类型. 如public UserDao extends HibernateDao

参数:

clazz - clazz The class to introspect

index - the Index of the generic ddeclaration,start from 0.

返回:

the index generic declaration, or Object.class if cannot be determined

fetchElementPropertyToList

public static List fetchElementPropertyToList(Collection collection,
                                              String propertyName)
                                       throws Exception

提取集合中的对象的属性,组合成List.

参数:

collection - 来源集合.

propertyName - 要提取的属性名.

抛出:

Exception

getActualTypeArguments

public static Type[] getActualTypeArguments(Type t)

查找Type中的参数泛型

参数:

t -

返回: