使用setter方法将成员设置为值；如果未找到成员，则使用成员访问将成员设置为值
/** * Copyright (c) 2003-2009, Xith3D Project Group all rights reserved. * * Portions based on the Java3D interface, Copyright by Sun Microsystems. * Many thanks to the developers of Java3D and Sun Microsystems for their * innovation and design. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * Neither the name of the 'Xith3D Project Group' nor the names of its * contributors may be used to endorse or promote products derived from this * software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) A * RISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE */ import java.lang.reflect.Method; public class Main{// 来自 时 代 J a v a - nowjava.com public static void main(String[] argv) throws Exception{ Object object = "nowjava.com"; String member = "nowjava.com"; Object value = "nowjava.com"; set(object,member,value); } /** * Sets a member to a value using a setter method, or if none found, * using member access if the member is public * * @param object * The object of which to set the member * @param member * The member to change * @param value * The value to set the member to */ public static void set(Object object, String member, Object value) { try { /** from NowJava.com**/ // try to find a setter Method met = getSetter(object, member); try { met.invoke(object, new Object[] { value }); } catch (Exception e) { throw new Error(e); } } catch (NoSetterException e) { try { // try to set it via member access object.getClass().getField(member).set(object, value); } catch (NoSuchFieldException ex) { throw new Error("Couldn't find setter nor member of name " + member + " in object of type : " + object.getClass().getSimpleName()); } catch (Exception ex) { throw new Error(ex); } } } /** * Finds the appropriate setter for the member of an object. * * @param object The object * @param member Its member * @return The setter * @throws NoSetterException if no setter can be found */ public static Method getSetter(Object object, String member) throws NoSetterException { StringBuffer buffer = new StringBuffer(member.length() + 4); buffer.append("set"); buffer.append(member.substring(0, 1).toUpperCase()); buffer.append(member.substring(1)); String name = buffer.toString(); Method met = null; try { // First try to get the most evident method, getMethod(memberType); Class<?> clazz = object.getClass().getDeclaredField(member) .getType(); // Try to find the method met = object.getClass().getMethod(name, new Class[] { clazz }); } catch (Exception e) { // Didn't work ? Well, let's try another way..