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: 反射工具类 * @author: gaoshuai * @date: 2015年8月5日 下午4:51:49 */public class ReflectionUtil{ /** * * @title: setField * @description: 设置某个成员遍历的值 * @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: 可以设置父类的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); } /** * 得到某个对象的公共属性 * * @param owner * , fieldName * @return 该属性对象 * @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; } /** * 得到某类的静态公共属性 * * @param className * 类名 * @param fieldName * 属性名 * @return 该属性对象 * @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; } /** * 执行某对象方法 * * @param owner * 对象 * @param methodName * 方法名 * @param args * 参数 * @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) { //一般的函数都是 int 而不是Integer argsClass[i] = int.class; } else if (args[i].getClass() == Float.class) { //一般的函数都是 int 而不是Integer argsClass[i] = float.class; } else if (args[i].getClass() == Double.class) { //一般的函数都是 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: 调用所有的函数, 包括父类的所有函数 * @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) { //一般的函数都是 int 而不是Integer argsClass[i] = int.class; } else if (args[i].getClass() == Float.class) { //一般的函数都是 int 而不是Integer argsClass[i] = float.class; } else if (args[i].getClass() == Double.class) { //一般的函数都是 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); } /** * 执行某类的静态方法 * * @param className * 类名 * @param methodName * 方法名 * @param args * 参数数组 * @return 执行方法返回的结果 * @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); } /** * 新建实例 * * @param className * 类名 * @param args * 构造函数的参数 如果无构造参数，args 填写为 null * @return 新建的实例 * @throws Exception */ public static Object newInstance(String className, Object[] args) throws NoSuchMethodException, SecurityException, ClassNotFoundException, InstantiationException, IllegalAccessException, IllegalArgumentException, InvocationTargetException { return newInstance(className, args, null); } /** * 新建实例 * * @param className * 类名 * @param args * 构造函数的参数 如果无构造参数，args 填写为 null * @return 新建的实例 * @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); } } /** * 是不是某个类的实例 * * @param obj * 实例 * @param cls * 类 * @return 如果 obj 是此类的实例，则返回 true */ public static boolean isInstance(Object obj, Class cls) { return cls.isInstance(obj); } /** * 得到数组中的某个元素 * * @param array * 数组 * @param index * 索引 * @return 返回指定数组对象中索引组件的值 */ public static Object getItemInArray(Object array, int index) { return Array.get(array, index); } /** * * @title: GetClassListByPackage * @description: 获取包下的所有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.调用getMethods方法输出的是自身的public方法和父类Object的public方法。调用getDeclaredMethods方法输出的是自身的public、protected、private方法。
2.如果想获取父类的私有函数
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; }