package com.siang.util;

import java.beans.BeanInfo;

import java.beans.Introspector;

import java.beans.PropertyDescriptor;

import java.lang.reflect.InvocationTargetException;

import java.lang.reflect.Method;

import java.util.HashMap;

import java.util.Map;

import org.apache.commons.beanutils.BeanUtils;

import org.apache.commons.beanutils.ConvertUtils;

import org.apache.commons.beanutils.converters.DateConverter;

public class BeanCopy {

	static

	{

		ConvertUtils.register(new DateConverter(), java.util.Date.class);

		ConvertUtils.register(new DateConverter(), java.sql.Date.class);

	}

	/**

	 * @1 map to bean

	 * @2 bean to bean

	 * @3 bean to map

	 */

	public static void 	copyProperties(Object dest, Object orig){

		try {

			if  (dest instanceof Map ) {//3 bean to map

				transBean2Map((Map)dest,orig);

			}else {

				BeanUtils.copyProperties(dest, orig);

			}

		} catch (IllegalAccessException e) {

			e.printStackTrace();

		} catch (InvocationTargetException e) {

			e.printStackTrace();

		}

	}

	/**

	 * model to map

	 * @param orig

	 */

	private static void transBean2Map(Map dest , Object orig) {

		  try {

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

	            PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();

	            for (PropertyDescriptor property : propertyDescriptors) {

	                String key = property.getName();

	                // 过滤class属性

	                if (!key.equals("class")) {

	                    // 得到property对应的getter方法

	                    Method getter = property.getReadMethod();

	                    Object value = getter.invoke(orig);

	                    dest.put(key, value);

	                }

	            }

	        } catch (Exception e) {

	            System.out.println("transBean2Map Error " + e);

	        }  

	}

	public static void main(String[] args) {

		Map<String, Object> map= new HashMap<String, Object>();

		map.put("id", "1");

		map.put("name", "穿林渡水");

		User user = new User();

		copyProperties(user , map);

		System.out.println(user.getId() + "---" + user.getName());

		User user1 = new User();

		copyProperties(user1 , user);

		System.out.println(user1.getId());

		Map<String, Object> map2= new HashMap<String, Object>();

		copyProperties(map2 , user);

		System.out.println(map2);

	}

}