Java对象序列化

悠悠 2022-08-18 15:29 167阅读 0赞

import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.OutputStream;
    import java.io.InputStream;
    import java.io.ObjectInputStream;
    import java.io.ObjectOutputStream;
    import java.io.Serializable;
    
    class Person implements Serializable
    {
    	private static final long serialVersionUID = -3569622348945012472L;
    
    	private String name; // 设置transient，name不会被序列化
    
    	private int age;
    	
    	private transient String sex;
    	
    	private String type = "美国";
    
    
    	public Person(String name, int age, String sex, String type){
    		this.name = name;
    		this.age = age;
    		this.sex = sex;
    		this.type = type;
    	}
    
    	public String toString()
    	{
    		return "  姓名:" + this.name + 
    			   ";年龄:" + this.age + 
    			   ";性别:" + this.sex +
    			   ";国家:" + this.type;
    	}
    }
    
    
    public class Test
    {
    	public static void main(String[] args) throws Exception
    	{
    		ser();
    		dser();
    	}
    
    	public static void ser() throws Exception
    	{
    		File f = new File("E:" + File.separator + "ss.txt");
    		
    		OutputStream out = new FileOutputStream(f);
    		ObjectOutputStream oos = new ObjectOutputStream(out);
    		
    		Person per1[][] = {
       {new Person("张一", 30, "男", "美国"),
    							new Person("张二", 31, "女", "美国"),
    							new Person("张三", 32, "男", "俄罗斯")},
    							{new Person("王一", 40, "男", "美国"),
    							new Person("王二", 41, "男", "美国"),
    							new Person("王五", 42, "女", "俄罗斯")}};
    		
    		oos.writeObject(per1);
    		
    		oos.flush();
    		oos.close();
    		out.close();
    	}
    
    	public static void dser() throws Exception
    	{
    		File f = new File("E:" + File.separator + "ss.txt");
    		
    		InputStream ipt = new FileInputStream(f);
    		ObjectInputStream ois = new ObjectInputStream(ipt);
    		
    		Object ps = ois.readObject();
    		if(ps != null)
    		{
    			for(Object o : (Object[][])ps)
    			{
    				for(Object p : (Object[])o)
    				{
    					System.out.print(p);
    				}
    				System.out.println();
    			}
    		}
    		
    		ois.close();
    		ipt.close();
    	}
    }