学步园

以前总听说对象的序列化，反序列化，只知道这些概念，并没深入理解其用途，今天在项目中想到用序列化来保存信息。。。

希望和大家能分享一下代码

User.class

package com.object;</p> <p>import java.io.Serializable;</p> <p>public class User implements Serializable{<br /> private String fisrtName;<br /> private String lastName;<br /> private String location;<br /> public String getFisrtName() {<br /> return fisrtName;<br /> }<br /> public void setFisrtName(String fisrtName) {<br /> this.fisrtName = fisrtName;<br /> }<br /> public String getLastName() {<br /> return lastName;<br /> }<br /> public void setLastName(String lastName) {<br /> this.lastName = lastName;<br /> }<br /> public String getLocation() {<br /> return location;<br /> }<br /> public void setLocation(String location) {<br /> this.location = location;<br /> }<br /> @Override<br /> public String toString() {<br /> // TODO Auto-generated method stub<br /> return "用户名："+lastName+"."+fisrtName+" 住址:"+location;<br /> }</p> <p>}<br />

ObjectClass.java

package com.object;</p> <p>import java.io.Serializable;<br /> import java.util.ArrayList;</p> <p>public class ObjectClass implements Serializable{<br /> private ArrayList<User> user;</p> <p> public ArrayList<User> getUser() {<br /> return user;<br /> }</p> <p> public void setUser(ArrayList<User> user) {<br /> this.user = user;<br /> }</p> <p>}<br />

Main.java

package com.object;</p> <p>import java.io.FileInputStream;<br /> import java.io.FileOutputStream;<br /> import java.io.ObjectInputStream;<br /> import java.io.ObjectOutputStream;<br /> import java.util.ArrayList;<br /> import java.util.Iterator;</p> <p>public class Main {<br /> public static void main(String[] args) {</p> <p> //saveObj();<br /> readObj();</p> <p> }<br /> public static void saveObj()<br /> {<br /> try<br /> {<br /> FileOutputStream fos = new FileOutputStream("D:/class.data",true);<br /> ObjectOutputStream oos = new ObjectOutputStream(fos);<br /> ObjectClass oc = new ObjectClass();<br /> ArrayList<User> list = new ArrayList<User>();<br /> for(int i=100;i<150;i++)<br /> {<br /> User u = new User();<br /> u.setFisrtName("Jack"+i);<br /> u.setLastName("Zhang");<br /> u.setLocation(String.valueOf(Math.random()));<br /> list.add(u);<br /> }<br /> oos.writeObject(list);<br /> oos.flush();<br /> oos.close();<br /> }catch(Exception e)<br /> {<br /> e.printStackTrace();<br /> }<br /> }<br /> public static void readObj()<br /> {<br /> try<br /> {<br /> FileInputStream fis = new FileInputStream("D:/class.data");<br /> ObjectInputStream ois = new ObjectInputStream(fis);<br /> ArrayList<User> list = (ArrayList<User>)ois.readObject();<br /> for(Iterator<User> it = list.iterator();it.hasNext();)<br /> {<br /> User u = it.next();<br /> System.out.println(u.toString());<br /> }</p> <p> }catch(Exception e)<br /> {<br /> e.printStackTrace();<br /> }<br /> }<br /> }<br />