testserializable.java

一个java聊天室程序 包括服务器端和用户端

package Day25;//序列化 实例

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.Serializable;
import java.util.Date;



public class TestSerializable {

	public TestSerializable() {
	}

	public static void main(String[] args) throws Exception {
		Date d1 = test1();
		Date d2 = test2();
		
		System.out.println(d1==d2);//比较的是对象，得到false
		System.out.println(d1.equals(d2));//比较的是内容，值相同 true

	}

	private static Date test1() throws IOException, FileNotFoundException {
		Date d = new Date();
	    System.out.println(d);
	    
	   ObjectOutputStream out = new ObjectOutputStream(
			   new BufferedOutputStream(
					   new FileOutputStream("c:\\test.dat",true)));//true为覆盖 false是追加
	
	   out.writeObject(d);//对象的序列化一定要用ObjectOutputStream 对象的方法
	   out.flush();
	   out.close();
	   
	   return d;
	}
	
	public static Date test2() throws Exception{
		  ObjectInputStream in = new ObjectInputStream(
				new BufferedInputStream(
					 new FileInputStream("c:\\test.dat")));
		  
		  Date d =(Date)in.readObject();//读保存过的对象 转型回Date型
		  System.out.println(d);
		  in.close();	
		  
		  return d;
	}
}