- 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
来自:http://my.oschina.net/sfshine/blog/488280
- 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;
- }
来源: http://www.phpxs.com/code/1001642/