Java序列化与反序列化三种格式存取

上一篇 / 下一篇 2012-08-15 10:17:15 / 个人分类：Java

U6B"Ie/a(ge0VHm0　　什么是序列化

s0K1X&d2ex0　　Java中的序列化（serialization）机制能够将一个实例对象的状态信息写入到一个字节流中，使其可以通过socket进行传输、或者持久化存储到数据库或文件系统中；然后在需要的时候，可以根据字节流中的信息来重构一个相同的对象。序列化机制在Java中有着广泛的应用，EJB、RMI等技术都是以此为基础的。

　　正确使用序列化机制51Testing软件测试网CPcU!u(B&[M

Z-wF*s:[bj)W}0　　一般而言，要使得一个类可以序列化，只需简单实现java.io.Serializable接口即可（还要实现无参数的构造方法）。该接口是一个标记式接口，它本身不包含任何内容，实现了该接口则表示这个类准备支持序列化的功能。如下例定义了类Person，并声明其可以序列化。

public class Person implements Serializable {

@9V qFW0`*p(h5W:E0 private static final long serialVersionUID = 1L;
U CgL.K0 51Testing软件测试网8v_2M,cjtA
private String name;;
!W0v'g`|-y0 private int age;51Testing软件测试网jhj z0K~m
public Person(){
qlysI,n}0
1H{!qWl0 }
?)wX*w(ogY/H0 public Person(String str,int n){
hX#FGc6U(P#?V0  System.out.println("Inside Person's Constructor");
j%@1@[_ aW0  name = str;
6xu"t(y'U0  age = n;
2FP9\rP#@0 }
/f n%{'q@RF0 public String getName() {
*f'act*b;w0  return name;
3^t^2J/[qf%|hd0 }
'[{#B~j~u0 public int getAge() {
VEakJmp}0  return age;
4@$[Le0?0 }51Testing软件测试网B h&v)U.}q)hr
}51Testing软件测试网3e6Z0M F?tu

XW'do'e:{X|7z:m0　　下面为三种格式转换的代码：51Testing软件测试网L ~|L\q$f

　　1、默认格式51Testing软件测试网.c5}ieb0n4\

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:\\person.txt");
   ObjectOutputStream os = new ObjectOutputStream(fos);
   System.out.println("Person--Jay,24---Written");

   oos.writeObject(myPerson);
   oos.flush();
   oos.close();
  }catch(Exception e){
   e.printStackTrace();
  }
}

@SuppressWarnings("resource")
public void restorePerson(){
  try{
   FileInputStream fls = new FileInputStream("E:\\person.txt");
   ObjectInputStream is = new ObjectInputStream(fls);

   Person myPerson = (Person)ois.readObject();
   System.out.println("\n---------------------\n");
   System.out.println("Person --read:");
   System.out.println("Name is:"+myPerson.getName());
   System.out.println("Age is :"+myPerson.getAge());

  }catch(Exception e){
   e.printStackTrace();
  }
}
}

\(O ]"SO7T0　　输出结果： sr test.serializable.Person I ageL namet Ljava/lang/String;xp t Jay

　2、XML格式51Testing软件测试网 YO-EX"{

uD*t$v"i pY3K'\Ym051Testing软件测试网b.y;@d"PD

//参考:http://www.cnblogs.com/bluesky5304/archive/2010/04/07/1706061.html
public class SerializeXML {51Testing软件测试网;e:nA!x\A

b a^A6[ m0 public static void main(String[] args) {51Testing软件测试网v~5v8]ww
  SerializeXML ser = new SerializeXML();
  ser.serializeToXml();51Testing软件测试网4i'GPT aG e
  ser.deSerializeFromXml();
iP}4bB`+KY0 }
msM `5ysE3s \T0 public void serializeToXml(){
C]d*gn W&P8n8K0  Person[] myPersons = new Person[2];
W3`{3t.r0  myPersons[0] = new Person("Jay", 24);51Testing软件测试网F4u%o+Vn
  myPersons[1] = new Person("Tom", 23);
  51Testing软件测试网?!kd9}EZ.wW
  XStream xStream = new XStream();
'FuV/[2b0f0  xStream.alias("Person", Person.class);
6J#[!Tt&f,U,j2T6n0  try{51Testing软件测试网XPG)Tq8^`
   FileOutputStream foStream = new FileOutputStream("E:\\persons.xml");51Testing软件测试网[7I6i'P1YC
   xStream.toXML(myPersons,foStream);
?v4N:qJJLg0  }catch(Exception e){
OR E*l?nqD0   e.printStackTrace();
g&k)u\o4M0  }
$L5_Fe6i6b6`0K0 }51Testing软件测试网4b3yy"]E
public void deSerializeFromXml(){
  XStream xStream = new XStream();51Testing软件测试网~ X2QA2|
  xStream.alias("Person", Person.class);
+v ^!oPR0  Person[] myPersons = null;
  try{
F'kn,N3\1a.Sy0   FileInputStream flStream = new FileInputStream("E:\\persons.xml");51Testing软件测试网 mc5In5w:U&L
   myPersons = (Person[])xStream.fromXML(flStream);
{fBWF(C0   if(myPersons!=null){
hBi1DA"^Zc_0    for(Person person:myPersons){51Testing软件测试网4x.\r'P~c
     System.out.println(person.getName());51Testing软件测试网JEh8^%\ n
     System.out.println(person.getAge());51Testing软件测试网R j!V4Zd&M_
    }51Testing软件测试网6dz^t'R'd
   }
7?^Rj%fC+z0  }catch(Exception e){
"Fa;qk-k,AD0   e.printStackTrace();51Testing软件测试网W'v?us
  }
bb_#cn {X;SE0 }51Testing软件测试网u9E/~Iv:{
}

;Gy/A-DN,XyWe7e0　　输出结果：

7RG5J8^B#LE051Testing软件测试网,XI#N Q CJI

<Person-array>
<Person>
    <name>Jay</name>
    <age>24</age>
</Person>
<Person>
    <name>Tom</name>
    <age>23</age>
</Person>
</Person-array>
　3、JSON格式

/}#l9Had7a.\?051Testing软件测试网7I` kYk*G0f

//参考:http://www.cnblogs.com/hoojo/archive/2011/04/22/2025197.html
public class SerializeJSON {51Testing软件测试网QmLE*~y

qIq;Z;V7u6kU0 public static void main(String[] args) {
Wo%~o'z'Q.kW7Lu0  SerializeJSON serializeJSON = new SerializeJSON();
  serializeJSON.writeJSON();
  serializeJSON.readJSON();
~7[3o/w'Ci"hd#{K0 }

%u6f-Y:IS2_0 public void writeJSON(){
IT0F+}$sd0  XStream xStream = new XStream(new JettisonMappedXmlDriver());
{iw4G'H_/IK0  Person person = new Person("geniushehe", 16);
  try {
\-_\)XxC_0   FileOutputStream fos = new FileOutputStream("E:\\json.js");
N:R4wB B9Yg;I&Dk,H0   xStream.setMode(XStream.NO_REFERENCES);
   xStream.alias("Person", Person.class);51Testing软件测试网b*gHk WJ]-^
   xStream.toXML(person, fos);51Testing软件测试网+Sg`P1}
  } catch (FileNotFoundException e) {
B%\z;N_$j0   e.printStackTrace();51Testing软件测试网 p*zeC7p+U4t
  }
3i2a}eXB0 }
public void readJSON(){51Testing软件测试网.\_WK,M"tJ
  XStream xStream = new XStream(new JettisonMappedXmlDriver());
nfbmM;RN0  Person person = null;51Testing软件测试网\V)|,D%s!} Y
  try {
"O1q~.S9K4X0   FileInputStream fis = new FileInputStream("E:\\json.js");51Testing软件测试网(`;^;S&Q-sP
   xStream.setMode(XStream.NO_REFERENCES);
G)Q.Dz0Y'N V([0   xStream.alias("Person", Person.class);
   person = (Person)xStream.fromXML(fis);
   System.out.println(person.getName());51Testing软件测试网Z i+la.GdG
   System.out.println(person.getAge());51Testing软件测试网Uwc+i_ w1N
  } catch (FileNotFoundException e) {
R:M9aC3pn6j0   e.printStackTrace();51Testing软件测试网7[6G;|/`5c6G
  }
'N~)A-?g+{0 }
-Lk0b ~N+Z_k0}

　　输出结果：

{"Person":{"name":"geniushehe","age":16}}

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bob123654

不要让那些真正对你好的人，慢慢的从你的生活中消失，无论爱情还是友情，都需要用心经营。

Java序列化与反序列化三种格式存取

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