Java的深度复制与浅层复制（二）

编程技术  /  houtizong 发布于 3年前   62

也可利用序列化与反序列化对对象进行深度复制

   1. public class Student implements Serializable {     2.      3.     private String name;     4.     private String tel;     5.     private int age;     6.          7.     //set and get.....     8. }     9.     10. public class Teacher implements Serializable {    11.     12.     private String name;    13.     private int age;    14.     private List<Student> stuList;    15.     16.     //set and get....    17.     18. }    19.     20. import java.io.ByteArrayInputStream;    21. import java.io.ByteArrayOutputStream;    22. import java.io.IOException;    23. import java.io.ObjectInputStream;    24. import java.io.ObjectOutputStream;    25. import java.util.ArrayList;    26. import java.util.List;    27.     28. public class Test {    29.     30.         31.     public static void main(String[] args) {    32.         Student s1 = new Student();    33.         s1.setName("Wang");    34.         s1.setAge(25);    35.         s1.setTel("110");    36.         Student s2 = new Student();    37.         s2.setName("Li");    38.         s2.setAge(35);    39.         s2.setTel("119");    40.             41.             42.         Teacher t = new Teacher();    43.         t.setName("Zhang");    44.         t.setAge(50);    45.         List<Student> stuList = new ArrayList<Student>();    46.         stuList.add(s1);    47.         stuList.add(s2);    48.         t.setStuList(stuList);          49.         System.out.println("t: "+t);    50.         System.out.println("s1: "+s1);    51.         System.out.println("s2: "+s2);    52.         System.out.println("after clone--------------");    53.         Teacher t2 = (Teacher) depthClone(t);    54.         System.out.println("t2: "+t2);    55.         System.out.println("t: "+t);    56.             57.         Student s3 = t2.getStuList().get(0);    58.         Student s4 = t2.getStuList().get(1);    59.         System.out.println("s3: "+s3);    60.         System.out.println("s1: "+s1);    61.         System.out.println("s4: "+s4);    62.         System.out.println("s2: "+s2);    63.             64.         System.out.println("after change--------------");    65.         t2.setAge(55);    66.         t2.setName("Zhao");    67.             68.         System.out.println("t2 Name: "+t2.getName()+" t2 age"+t2.getAge());    69.         System.out.println("t Name: "+t.getName()+" t age"+t.getAge());    70.     71.     }    72.         73.     private static Object depthClone(Object srcObj){    74.         Object cloneObj = null;    75.         try {    76.             ByteArrayOutputStream out = new ByteArrayOutputStream();    77.             ObjectOutputStream oo = new ObjectOutputStream(out);    78.             oo.writeObject(srcObj);    79.                 80.             ByteArrayInputStream in = new ByteArrayInputStream(out.toByteArray());    81.             ObjectInputStream oi = new ObjectInputStream(in);    82.             cloneObj = oi.readObject();             83.         } catch (IOException e) {    84.             e.printStackTrace();    85.         } catch (ClassNotFoundException e) {    86.             e.printStackTrace();    87.         }    88.         return cloneObj;    89.     }    90.     91. }  

输入结果：
t: jame.jsp.bean.Teacher@affc70
s1: jame.jsp.bean.Student@1e63e3d
s2: jame.jsp.bean.Student@1004901
after clone--------------
t2: jame.jsp.bean.Teacher@1f14ceb
t: jame.jsp.bean.Teacher@affc70
s3: jame.jsp.bean.Student@f0eed6
s1: jame.jsp.bean.Student@1e63e3d
s4: jame.jsp.bean.Student@1d05c81
s2: jame.jsp.bean.Student@1004901
after change--------------
t2 Name: Zhao t2 age55
t Name: Zhang t age50

* 本文内容摘自 http://qhhhn.iteye.com/blog/189498