描述
BasicDynaBean 和 BasicDynaClass 的实现指定动态属性动态提供属性集的容量.您可以从 DynaClass 开始建立属性集. newInstance()方法将为DynaClass创建一个新的DynaBean实例并占用其初始值,如下例所示.
示例
以下示例显示了基本DynaBean实现的用法:
package com.javadb.apachecommons;import org.apache.commons.beanutils.BasicDynaClass;import org.apache.commons.beanutils.DynaBean;import org.apache.commons.beanutils.DynaClass;import org.apache.commons.beanutils.DynaProperty;public class DynaBeanExample { private final String NR_OF_WHEELS = "numberOfWheels"; private void runExample() { DynaClass dynaClass = new BasicDynaClass("Car", null, new DynaProperty[] { new DynaProperty(NR_OF_WHEELS, Integer.TYPE) }); try { DynaBean car = dynaClass.newInstance(); car.set(NR_OF_WHEELS, 4); System.out.println("Number of wheels: " + car.get(NR_OF_WHEELS)); System.out.println("DynaBean is instance of DynaClass: " + car.getDynaClass().getName()); } catch (IllegalAccessException | InstantiationException ex) { System.err.println(ex.getMessage()); } } public static void main(String[] args) { DynaBeanExample ac = new DynaBeanExample(); ac.runExample(); }}
输出
让我们执行以下步骤看看上面的代码是如何工作的:
将上面的第一个代码保存为 DynaBeanExample.java .
现在使用"运行"选项或Ctrl + f11执行代码并显示如下输出.