package com.su.dolphin.utils;import java.lang.reflect.Array;import java.lang.reflect.Constructor;import java.lang.reflect.Field;import java.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;/** * * @className: ReflectionUtil * @description: 反射工具類 * @author: gaoshuai * @date: 2015年8月5日 下午4:51:49 */public class ReflectionUtil{ /** * * @title: setField * @description: 設(shè)置某個成員遍歷的值 * @param owner * @param fieldName * @param value * @throws Exception * @return: void */ public static void setField(Object owner, String fieldName, Object value) throws Exception { Class<?> ownerClass = owner.getClass(); Field field = ownerClass.getDeclaredField(fieldName); field.setAccessible(true); field.set(owner, value); } /** * * @title: setFieldAll * @description: 可以設(shè)置父類的field的值 * @param owner * @param fieldName * @param value * @throws Exception * @return: void */ public static void setFieldAll(Object owner, String fieldName, Object value) throws Exception { Class<?> ownerClass = owner.getClass(); Field field = null; for (Class<?> clazz = ownerClass; clazz != Object.class; clazz = clazz.getSuperclass()) { try { field = clazz.getDeclaredField(fieldName); LogUtil.d(field + " find : in " + clazz.getName()); break; } catch (Exception e) { LogUtil.d(fieldName + " not find in " + clazz.getName()); } } field.setAccessible(true); field.set(owner, value); } /** * 得到某個對象的公共屬性 * * @param owner * , fieldName * @return 該屬性對象 * @throws Exception * */ public static Object getField(Object owner, String fieldName) throws Exception { Class<?> ownerClass = owner.getClass(); Field field = ownerClass.getField(fieldName); Object property = field.get(owner); return property; } /** * 得到某類的靜態(tài)公共屬性 * * @param className * 類名 * @param fieldName * 屬性名 * @return 該屬性對象 * @throws Exception */ public static Object getStaticField(String className, String fieldName) throws Exception { Class<?> ownerClass = Class.forName(className); Field field = ownerClass.getField(fieldName); Object property = field.get(ownerClass); return property; } /** * 執(zhí)行某對象方法 * * @param owner * 對象 * @param methodName * 方法名 * @param args * 參數(shù) * @return 方法返回值 * @throws Exception */ public static Object invokeMethod(Object owner, String methodName, Object... args) throws Exception { Class<?> ownerClass = owner.getClass(); Class<?>[] argsClass = new Class[args.length]; for (int i = 0, j = args.length; i < j; i++) { if (args[i].getClass() == Integer.class) { //一般的函數(shù)都是 int 而不是Integer argsClass[i] = int.class; } else if (args[i].getClass() == Float.class) { //一般的函數(shù)都是 int 而不是Integer argsClass[i] = float.class; } else if (args[i].getClass() == Double.class) { //一般的函數(shù)都是 int 而不是Integer argsClass[i] = double.class; } else { argsClass[i] = args[i].getClass(); } } Method method = ownerClass.getDeclaredMethod(methodName, argsClass); method.setAccessible(true); return method.invoke(owner, args); } /** * * @title: invokeMethodAll * @description: 調(diào)用所有的函數(shù), 包括父類的所有函數(shù) * @param owner * @param methodName * @param args * @return * @throws Exception * @return: Object */ public static Object invokeMethodAll(Object owner, String methodName, Object... args) throws Exception { Class<?> ownerClass = owner.getClass(); Class<?>[] argsClass = new Class[args.length]; for (int i = 0, j = args.length; i < j; i++) { if (args[i].getClass() == Integer.class) { //一般的函數(shù)都是 int 而不是Integer argsClass[i] = int.class; } else if (args[i].getClass() == Float.class) { //一般的函數(shù)都是 int 而不是Integer argsClass[i] = float.class; } else if (args[i].getClass() == Double.class) { //一般的函數(shù)都是 int 而不是Integer argsClass[i] = double.class; } else { argsClass[i] = args[i].getClass(); } } Method method = null; for (Class<?> clazz = ownerClass; clazz != Object.class; clazz = clazz.getSuperclass()) { try { method = clazz.getDeclaredMethod(methodName, argsClass); LogUtil.d(method + " find : in " + clazz.getName()); return method; } catch (Exception e) { //e.printStackTrace(); LogUtil.d(methodName + " not find in " + clazz.getName()); } } method.setAccessible(true); return method.invoke(owner, args); } /** * 執(zhí)行某類的靜態(tài)方法 * * @param className * 類名 * @param methodName * 方法名 * @param args * 參數(shù)數(shù)組 * @return 執(zhí)行方法返回的結(jié)果 * @throws Exception */ public static Object invokeStaticMethod(String className, String methodName, Object... args) throws Exception { Class<?> ownerClass = Class.forName(className); Class<?>[] argsClass = new Class[args.length]; for (int i = 0, j = args.length; i < j; i++) { argsClass[i] = args[i].getClass(); } Method method = ownerClass.getMethod(methodName, argsClass); method.setAccessible(true); return method.invoke(null, args); } /** * 新建實例 * * @param className * 類名 * @param args * 構(gòu)造函數(shù)的參數(shù) 如果無構(gòu)造參數(shù)，args 填寫為 null * @return 新建的實例 * @throws Exception */ public static Object newInstance(String className, Object[] args) throws NoSuchMethodException, SecurityException, ClassNotFoundException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { return newInstance(className, args, null); } /** * 新建實例 * * @param className * 類名 * @param args * 構(gòu)造函數(shù)的參數(shù) 如果無構(gòu)造參數(shù)，args 填寫為 null * @return 新建的實例 * @throws Exception */ public static Object newInstance(String className, Object[] args, Class<?>[] argsType) throws NoSuchMethodException, SecurityException, ClassNotFoundException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { Class<?> newoneClass = Class.forName(className); if (args == null) { return newoneClass.newInstance(); } else { Constructor<?> cons; if (argsType == null) { Class<?>[] argsClass = new Class[args.length]; for (int i = 0, j = args.length; i < j; i++) { argsClass[i] = args[i].getClass(); } cons = newoneClass.getConstructor(argsClass); } else { cons = newoneClass.getConstructor(argsType); } return cons.newInstance(args); } } /** * 是不是某個類的實例 * * @param obj * 實例 * @param cls * 類 * @return 如果 obj 是此類的實例，則返回 true */ public static boolean isInstance(Object obj, Class<?> cls) { return cls.isInstance(obj); } /** * 得到數(shù)組中的某個元素 * * @param array * 數(shù)組 * @param index * 索引 * @return 返回指定數(shù)組對象中索引組件的值 */ public static Object getItemInArray(Object array, int index) { return Array.get(array, index); } /** * * @title: GetClassListByPackage * @description: 獲取包下的所有Class * @param pPackage * @return * @return: Class<?> */ public static Class<?> getClassListByPackage(String pPackage) { Package _Package = Package.getPackage(pPackage); Class<?> _List = _Package.getClass(); return _List; }}
注意:
1.調(diào)用getMethods方法輸出的是自身的public方法和父類Object的public方法。調(diào)用getDeclaredMethods方法輸出的是自身的public、protected、private方法。
2.如果想獲取父類的私有函數(shù)
public static Method getDeclaredMethod(Object object, String methodName, Class<?> ... parameterTypes){ Method method = null ; for(Class<?> clazz = object.getClass() ; clazz != Object.class ; clazz = clazz.getSuperclass()) { try { method = clazz.getDeclaredMethod(methodName, parameterTypes) ; return method ; } catch (Exception e) { } } return null; }
