java 使用BeanInfo实现bean实体与map之间的互相转换

java 使用BeanInfo实现bean实体与map之间的互相转换。
public interface BeanInfo希望提供有关其 bean 的显式信息的 bean 实现者可以提供某个 BeanInfo 类，该类实现此 BeanInfo 接口并提供有关其 bean 的方法、属性、事件等显式信息。

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.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Map.Entry;

import com.bh.bean.User;

public class Test {

	/**
	 * bean转map
	 */
	public Test() {
		try {
			Map user=beanTransformToMap(new User(1, "zs"));
			Iterator> iterator = user.entrySet().iterator();
			while(iterator.hasNext()){
				Entry next = iterator.next();
				System.out.println(next.getKey()+" "+next.getValue());
			}

		} catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException
				| IntrospectionException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	/**map转实体
	 * @param map
	 * @return
	 * @throws IllegalAccessException
	 * @throws IllegalArgumentException
	 * @throws InvocationTargetException
	 * @throws IntrospectionException
	 */
	private User mapTransformToBean(Map map) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, IntrospectionException{
		
		User user=new User();
		BeanInfo beanInfo = Introspector.getBeanInfo(user.getClass());  
        PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();  
        for (PropertyDescriptor property : propertyDescriptors) {  
            String key = property.getName();  
            if (map.containsKey(key)) {  
                Object value = map.get(key);  
                //得到property对应的setter方法  
                Method setter = property.getWriteMethod();  
                setter.invoke(user, value);  
            }  
        }
		return user;  
	}
	/**实体转map
	 * @param user
	 * @return
	 * @throws IllegalAccessException
	 * @throws IllegalArgumentException
	 * @throws InvocationTargetException
	 * @throws IntrospectionException
	 */
	private Map beanTransformToMap(User user) throws IllegalAccessException, IllegalArgumentException, InvocationTargetException, IntrospectionException{

		Map map = new HashMap();
		BeanInfo beanInfo = Introspector.getBeanInfo(user.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(user);  
				map.put(key, value);  
			}  
		}
		return map;  
	}
	public static void main(String[] args) {

		new Test();
	}
}

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