基本概念：
序列化是将对象状态转换为可保持或传输的格式的过程。与序列化相对的是反序列化，它将流转换为对象。这两个过程结合起来，可以轻松地存储和传输数据。昨天在一本书上看到了，好好实践了一下，序列化为一般文件，也序列化为XML文件（使用XStream）。用于序列化的实体类Person.java 代码如下（记得需要实现Serializable接口）：import java.io.Serializable;@SuppressWarnings("serial")public class Person implements Serializable{ private String name; private int age; public Person(){ } public Person(String str, int n){ System.out.println("Inside Person's Constructor"); name = str; age = n; } String getName(){ return name; } int getAge(){ return age; }}序列化、反序列化为一般的文件，SerializeToFlatFile.java类的代码如下： import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.ObjectInputStream; import java.io.ObjectOutputStream; public class SerializeToFlatFile { public static void main(String[] args) { SerializeToFlatFile ser = new SerializeToFlatFile(); ser.savePerson(); ser.restorePerson(); } public void savePerson(){ Person myPerson = new Person("Jay",24); try { FileOutputStream fos = new FileOutputStream("E:\\workspace\\2010_03\\src\\myPerson.txt"); ObjectOutputStream oos = new ObjectOutputStream(fos); System.out.println("Person--Jay,24---Written"); System.out.println("Name is: "+myPerson.getName()); System.out.println("Age is: "+myPerson.getAge()); oos.writeObject(myPerson); oos.flush(); oos.close(); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } public void restorePerson() { try { FileInputStream fis = new FileInputStream("E:\\workspace\\2010_03\\src\\myPerson.txt"); ObjectInputStream ois = new ObjectInputStream(fis); Person myPerson = (Person)ois.readObject(); System.out.println("\n--------------------\n"); System.out.println("Person--Jay,24---Restored"); System.out.println("Name is: "+myPerson.getName()); System.out.println("Age is: "+myPerson.getAge()); } catch (Exception e) { // TODO: handle exception e.printStackTrace(); } } } 运行结果为（console输出），当然可以查看到myPerson.txt文件已经生成： Inside Person's Constructor Person--Jay,24---Written Name is: Jay Age is: 24 -------------------- Person--Jay,24---Restored Name is: Jay Age is: 24
序列化、反序列化为XML文件，我使用了XStream来序列化，需要引入xstream-1.3.1.jar包的支持， http://xstream.codehaus.org/download.html 处可以下载jar，然后引入到Eclipse中的build path中。 Serialize.java的代码如下： import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import com.thoughtworks.xstream.*; public class Serialize { public static void main(String[] args) { Serialize ser = new Serialize(); ser.serializeToXml(); ser.deSerializeFromXml(); } public void serializeToXml(){ Person[] myPerson = new Person[2]; myPerson[0] = new Person("Jay",24); myPerson[1] = new Person("Tom",23); XStream xstream = new XStream(); try { FileOutputStream fos = new FileOutputStream("E:\\workspace\\2010_03\\src\\myPerson.xml"); xstream.toXML(myPerson,fos); } catch (FileNotFoundException ex) { ex.printStackTrace(); } System.out.println(xstream.toXML(myPerson)); } public void deSerializeFromXml(){ XStream xs = new XStream(); Person[] myPerson = null; try { FileInputStream fis = new FileInputStream("E:\\workspace\\2010_03\\src\\myPerson.xml"); myPerson=(Person[])xs.fromXML(fis); if (myPerson != null) { int len = myPerson.length; for (int i=0;i<len;i++) { System.out.println(myPerson[i].getName()); System.out.println(myPerson[i].getAge()); } } } catch (FileNotFoundException ex) { ex.printStackTrace(); } } } 运行结果为（console输出），当然可以查看到myPerson.xml文件已经生成： Inside Person's Constructor Inside Person's Constructor <Person-array> <Person> <name>Jay</name> <age>24</age> </Person> <Person> <name>Tom</name> <age>23</age> </Person> </Person-array> Jay 24 Tom 23