Java的深度复制与浅层复制（二）

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