import java.beans.BeanInfo;

import java.beans.IntrospectionException;

import java.beans.Introspector;

import java.beans.PropertyDescriptor;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;

import org.apache.commons.beanutils.PropertyUtils;

public class IntroSpectorTest {

 /**

  * @param args

  */

 public static void main(String[] args) throws Exception {

  // TODO Auto-generated method stub

  ReflectPoint pt1 = new ReflectPoint(3,5);

  

  String propertyName = "x";

  //"x"-->"X"-->"getX"-->MethodGetX-->

  Object retVal = getProperty(pt1, propertyName);

  System.out.println(retVal);

  

  Object value = 7;

  

  setProperties(pt1, propertyName, value);

  System.out.println(BeanUtils.getProperty(pt1, "x").getClass().getName());

  BeanUtils.setProperty(pt1, "x", "9");

  System.out.println(pt1.getX());

  /*

  //java7的新特性

  Map map = {name:"zxx",age:18};

  BeanUtils.setProperty(map, "name", "lhm");

  */

  BeanUtils.setProperty(pt1, "birthday.time", "111");

  System.out.println(BeanUtils.getProperty(pt1, "birthday.time"));

  

  PropertyUtils.setProperty(pt1, "x", 9);

  System.out.println(PropertyUtils.getProperty(pt1, "x").getClass().getName());

  

 }

 private static void setProperties(Object pt1, String propertyName,

   Object value) throws IntrospectionException,

   IllegalAccessException, InvocationTargetException {

  PropertyDescriptor pd2 = new PropertyDescriptor(propertyName,pt1.getClass());

  Method methodSetX = pd2.getWriteMethod();

  methodSetX.invoke(pt1,value);

 }

 private static Object getProperty(Object pt1, String propertyName)

   throws IntrospectionException, IllegalAccessException,

   InvocationTargetException {

  /*PropertyDescriptor pd = new PropertyDescriptor(propertyName,pt1.getClass());

  Method methodGetX = pd.getReadMethod();

  Object retVal = methodGetX.invoke(pt1);*/

  

  BeanInfo beanInfo =  Introspector.getBeanInfo(pt1.getClass());

  PropertyDescriptor[] pds = beanInfo.getPropertyDescriptors();

  Object retVal = null;

  for(PropertyDescriptor pd : pds){

   if(pd.getName().equals(propertyName))

   {

    Method methodGetX = pd.getReadMethod();

    retVal = methodGetX.invoke(pt1);

    break;

   }

  }

  return retVal;

 }

}