工作空间的相对路径和绝对路径

java

1. 相对路径：src/com/leetcode/xqf/hah.txt
2. 绝对路径就要把盘符加上

参考博文

1.不规范的序列化

class Student implements Serializable {
    private String name;
    private int age;
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }
    public String toString() {
        return "name :" + name + "   " + "age :" + age;
    }
}
public class Test {
    public static void main(String[] args) {
        File file = new File("src/com/leetcode/xqf/hah.txt");
        FileInputStream fileIn = null;
        try {
            fileIn = new FileInputStream(file);
            FileOutputStream fileOut = new FileOutputStream(file);
            ObjectOutputStream objectOut = new ObjectOutputStream(fileOut);
            objectOut.writeObject(new Student("XQF", 23));
            objectOut.writeObject(new Student("WLY", 20));
            ObjectInputStream objectIn = new ObjectInputStream(fileIn);
            Student s1 = (Student) objectIn.readObject();
            System.out.println(s1);
            Student s2 = (Student) objectIn.readObject();
            System.out.println(s2);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

2.规范的序列化（UUID）

ublic class Serializable01 extends Object implements Serializable{  
    private static final long serialVersionUID = -1466479389299512377L;  
    public byte b = 12;  
    public byte getB() {  
        return b;  
    }  
    public void setB(byte b) {  
        this.b = b;  
    }  
    public static void main(String[] args) {  
        try {  
            FileOutputStream fos = new FileOutputStream(new File("E:\\tmp\\demo2.txt"));  
            ObjectOutputStream os = new ObjectOutputStream(fos);  
            Serializable01 s = new Serializable01();  
            os.writeObject(s);  
            os.flush();  
            os.close();  
            FileInputStream fis = new FileInputStream(new File("E:\\tmp\\demo2.txt"));  
            ObjectInputStream ois = new ObjectInputStream(fis);  
            Serializable01 s2 = (Serializable01)ois.readObject();  
            System.out.println(s2.getB());  
            ois.close();  
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        } catch (ClassNotFoundException e) {  
            e.printStackTrace();  
        }  
    }  
}