1.序列化

1.什么是序列化

      Java的序列化说白了就是把普通的I/O流的字符串对象变成了其它的任务抽象数据类型。用ObjectOutputStream和ObjectInputStream把实现细节进行封装，以达到减少程序员的工作量的目的。

2.序列化的对象

     序列化要求实现Serializable接口：

package com.taoistwar.jpa.test;

import java.io.Serializable;

public class SerObject implements Serializable {
	private static final long serialVersionUID = 2129765528253670319L;
	private String username;
	private String password;

	public SerObject() {
		super();
	}

	public String getUsername() {
		return username;
	}

	public void setUsername(String username) {
		this.username = username;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public static long getSerialVersionUID() {
		return serialVersionUID;
	}

}

 3.序列化的读写操作

package com.taoistwar.jpa.test;

import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

public class Test {
	public static void main(String[] args) {
		String path = "c:/serializable.dat";
		SerObject so = new SerObject();
		so.setUsername("taoistwar");
		so.setPassword("test");
		Test test = new Test();
		try {
			test.writeObject(path, so);
			System.out.println("================");
			SerObject so2 = (SerObject) test.getObject(path);
			System.out.println(so2.getUsername());
			System.out.println(so2.getPassword());
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public <T> void writeObject(String path, T t) throws Exception {
		FileOutputStream fos = new FileOutputStream(path);
		writeObject(fos, t);
	}

	public <T> void writeObject(FileOutputStream fos, T t) throws Exception {
		ObjectOutputStream oos = new ObjectOutputStream(fos);
		SerObject so = new SerObject();
		so.setUsername("TaoistWar");
		so.setPassword("19880910");
		oos.writeObject(so);
	}

	public Object getObject(String path) throws IOException,
			ClassNotFoundException {
		return getObject(new FileInputStream(path));
	}

	@SuppressWarnings("unchecked")
	public Object getObject(FileInputStream fis) throws IOException,
			ClassNotFoundException {
		ObjectInputStream ois = new ObjectInputStream(fis);
		Object object = ois.readObject();
		ois.close();
		return object;
	}
}