📅  最后修改于: 2020-11-04 07:05:20             🧑  作者: Mango
BasicDynaBean和BasicDynaClass的实现指定了动态属性动态提供属性集的能力。您可以从DynaClass开始以建立属性集。 newInstance()方法将为DynaClass创建一个新的DynaBean实例,并占用其初始值,如下面的示例所示。
下面的示例显示基本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();
}
}
让我们执行以下步骤,看看上面的代码如何工作:
将上面的第一个代码另存为DynaBeanExample.java 。
现在,使用“运行”选项或Ctrl + f11执行代码,并显示以下输出。