深层clone必备良药

import java.io.ByteArrayInputStream;

import java.io.ByteArrayOutputStream;

import java.io.IOException;

import java.io.ObjectInputStream;

import java.io.ObjectOutputStream;
public abstract class BeanUtil {

	@SuppressWarnings("unchecked")

	public static  <T> T cloneTo(T src) throws RuntimeException {

		ByteArrayOutputStream memoryBuffer = new ByteArrayOutputStream();

		ObjectOutputStream out = null;

		ObjectInputStream in = null;

		T dist = null;

		try {

			out = new ObjectOutputStream(memoryBuffer);

			out.writeObject(src);

			out.flush();

			in = new ObjectInputStream(new ByteArrayInputStream(memoryBuffer.toByteArray()));

			dist = (T) in.readObject();

		} catch (Exception e) {

			throw new RuntimeException(e);

		} finally {

			if (out != null)

				try {

					out.close();

					out = null;

				} catch (IOException e) {

					throw new RuntimeException(e);

				}

			if (in != null)

				try {

					in.close();

					in = null;

				} catch (IOException e) {

					throw new RuntimeException(e);

				}

		}

		return dist;

	}

}