p2 =  (Person)org.apache.commons.lang3.ObjectUtils.cloneBean(p);

     Person p2 =  new Person();

      p2 =  (Person)org.apache.commons.lang3.ObjectUtils.cloneBean(p);

     System.out.println(p2);

     p2.name = "wewr";

     System.out.println(p2);

     System.out.println(p);

Person{age=1, name='adfa', p=null}

Person{age=1, name='wewr', p=null}

Person{age=1, name='adfa', p=null}

package asdfasdf;

import org.apache.commons.beanutils.BeanUtils;

import org.apache.commons.lang3.ObjectUtils;

import org.apache.hadoop.mapreduce.lib.input.LineRecordReader;

import org.junit.Test;

import java.io.*;

import java.lang.reflect.InvocationTargetException;

/**

 * Hello world!

 *

 */

public class App

{

    @Test

   public void test1() throws InvocationTargetException, NoSuchMethodException, InstantiationException, IllegalAccessException {

        Person p = new Person();

        p.age = 1;

        p.name = "adfa";

     Person p2 =  new Person();

      p2 =  (Person)org.apache.commons.beanutils.BeanUtils.cloneBean(p);

     System.out.println(p2);

     p2.name = "wewr";

     System.out.print(p2);

     System.out.print(p);

   }

   @Test

   public void test2() throws IOException, ClassNotFoundException {

       Person p = new Person();

       p.age = 1;

       p.name = "adfa";

       Person p2 =  null;

       ByteArrayOutputStream baos = new ByteArrayOutputStream();

       ObjectOutputStream oos = new ObjectOutputStream(baos);

       oos.writeObject(p);

       // 将流序列化成对象

       ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());

       ObjectInputStream ois = new ObjectInputStream(bais);

       p2 = (Person) ois.readObject();

       System.out.println(p2);

       p2.name = "wewr";

       System.out.println(p2);

       System.out.println(p);

   }

}

public class Person implements Serializable{

    private static final long serialVersionUID = 369285298572941L;  //最好是显式声明ID

    int age;

    String name;

    Person p;