3.Java核心API---序列化

1.为什么要序列化

在开发中，经常需要将对象的信息保存到磁盘中以便于以后检索。如果逐一的对对象的属性进行操作通常是非常繁琐的，而且容易出错。简单的说，序列化就是将对象的状态存储到特定的存储介质中的过程，也就是将对象状态转换为可保持或可传输的过程。其实，就是把对象转换为流，写入到文件中。反序列化就是把写入文件的内容读取出来。

2.实例

package IO;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectOutputStream;import java.io.Serializable;class Student implements Serializable {String name;String age;public String getName() {return name;}public void setName(String name) {this.name = name;}public String getAge() {return age;}public void setAge(String age) {this.age = age;}}public class Serial_ext {public static void main(String[] args) {ObjectOutputStream oos = null;try {oos = new ObjectOutputStream(new FileOutputStream("E:\\stu.txt"));Student stu = new Student();stu.setName("李白");stu.setAge("20");oos.writeObject(stu);} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} finally {if (oos != null) {try {oos.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}}}

package IO;import java.io.FileInputStream;import java.io.IOException;import java.io.ObjectInputStream;public class Serial_get {public static void main(String[] args) throws ClassNotFoundException {ObjectInputStream ois = null;try {ois = new ObjectInputStream(new FileInputStream("E:\\stu.txt"));Student stu = (Student) ois.readObject();System.out.println("学生姓名：" + stu.getName());System.out.println("学生年龄:" + stu.getAge());} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}}