不管属性是可见的还是隐藏的，或者是在给定的类，超类或已实现的接口中声明的，都将调用属性的设置器。
/* * Copyright (c) 2012 Data Harmonisation Panel * * All rights reserved. This program and the accompanying materials are made * available under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * You should have received a copy of the GNU Lesser General Public License * along with this distribution. If not, see <http://www.gnu.org/licenses/>. * * Contributors: * HUMBOLDT EU Integrated Project #030962 * Data Harmonisation Panel <http://www.dhpanel.eu> */ //package com.nowjava; /** 时代Java - nowjava.com 提供 **/ import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; public class Main { /** * Invokes a setter for a property, no matter if the setter is visible or * hidden or if it is declared in the given class or in a superclass or * implemented interface. * * @param bean the object to invoke the public setter on * @param propertyName the name of the property that shall be updated * @param value the value passed to the setter * @throws IllegalArgumentException if the argument's type is invalid * @throws IllegalAccessException if the setter is not accessible * @throws InvocationTargetException if the setter throws an exception * @throws NoSuchMethodException if there is no setter for this property */ public static void setDeepProperty(Object bean, String propertyName, Object value) throws IllegalArgumentException, IllegalAccessException, InvocationTargetException, NoSuchMethodException { Method setter = findDeepSetter(bean.getClass(), propertyName, value.getClass()); if (setter == null) { throw new NoSuchMethodException("There is " + //$NON-NLS-1$ "no setter for property " + propertyName); //$NON-NLS-1$ } invokeSetter(bean, setter, value); } /* from 时 代 Java 公 众 号 - nowjava.com*/ /** * Returns a setter method for a given property, no matter if the method is * visible or hidden or if it is declared in the given class or in a * superclass or implemented interface. * * @param c the class which would contain the setter method * @param property the property * @param propertyType the property's type * @return the setter or null if there is no setter for this property */ public static Method findDeepSetter(Class<?> c, String property, Class<?> propertyType) { if (c == Object.class || c == null) { return null; } char[] propertyNameArr = property.toCharArray(); propertyNameArr[0] = Character.toUpperCase(propertyNameArr[0]); String setterName = "set" + new String(propertyNameArr); //$NON-NLS-1$ Method result = null; // search visible and hidden methods in this class Method[] methods = c.getDeclaredMethods(); for (Method m : methods) { if (m.getName().equals(setterName) && m.getParameterTypes().length == 1 && (propertyType == null || m.getParameterTypes()[0] .isAssignableFrom(propertyType))) { result = m; break; } } // search superclass and interfaces if (result == null) { result = findDeepSetter(c.getSuperclass(), property, propertyType); if (result == null) { Class<?>[] interfaces = c.getInterfaces(); for (Class<?> inter : interfaces) { result = findDeepSetter(inter, property, propertyType); if (result != null) { break; } } } } return result; }