Question

怎么用JAVA文件流读取文件然后保存到对象中?

Answer 1

应用public ObjectInputStream(InputStream in)构造一个ObjectionInputStream对象ois，再应用ois的public final Object readObject()读取一个Object对象强制转换为你对象。
ObjectionInputStream ois=new ObjectionInputStream(in);
Object o=ois.readeObject();

追问

您能不能跟我举一个详细的例子？麻烦了！

追答

package com;

import java.io.Serializable;
//注意需要实现Serializable接口，否则无法写入文件中
public class Person implements Serializable{

private static final long serialVersionUID = 1L;
public int id;
public String name;
public Person(){}
}

package com;

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

public class Test {
public static void main(String[] args) {
try {
File f=new File("d://temp.txt");
f.createNewFile();
Person p=new Person();
p.id=1;
p.name="test";
FileOutputStream fos=new FileOutputStream(f);
ObjectOutputStream oos=new ObjectOutputStream(fos);
oos.writeObject(p);
fos.flush();
fos.close();
FileInputStream fis=new FileInputStream(f);
ObjectInputStream ois=new ObjectInputStream(fis);

Person p1=new Person();
p1=(Person)ois.readObject();

fis.close();
System.out.println("person'id is :"+p1.id+" and person'name is :"+p1.name);
} catch (Exception e) {
e.printStackTrace();
}
}
}