java使用类序列化反序列化(读写文件)

developer 2021年02月13日编程语言 416 0

创建类：Role

package com.wbg.springRedis.entity; 
 
import java.io.Serializable; 
 
public class Role implements Serializable { 
    private int id; 
    private String roleName; 
    private String note; 
    @Override 
    public String toString() { 
        return "Role{" + 
                "id=" + id + 
                ", roleName='" + roleName + '\'' + 
                ", note='" + note + '\'' + 
                '}'; 
    } 
 
    public Role() { 
    } 
 
    public Role(String roleName, String note) { 
        this.roleName = roleName; 
        this.note = note; 
    } 
 
    public Role(int id, String roleName, String note) { 
        this.id = id; 
        this.roleName = roleName; 
        this.note = note; 
    } 
 
    public int getId() { 
        return id; 
    } 
 
    public void setId(int id) { 
        this.id = id; 
    } 
 
    public String getRoleName() { 
        return roleName; 
    } 
 
    public void setRoleName(String roleName) { 
        this.roleName = roleName; 
    } 
 
    public String getNote() { 
        return note; 
    } 
 
    public void setNote(String note) { 
        this.note = note; 
    } 
}

View Code

一、序列化写文件：

　　　　List<Role> list = new ArrayList<>(); 
        for (int i = 0; i < 20; i++) { 
            Role role = new Role(i, "roleName" + i, "note" + i); 
            list.add(role); 
        } 
 
        FileOutputStream fileInputStream = new FileOutputStream(new File("g:/role.class")); 
        ObjectOutputStream stream = new ObjectOutputStream(fileInputStream); 
        stream.writeObject(list); 
        stream.close();

二、反序列化读取文件：

  FileInputStream fileInputStream = new FileInputStream(new File("g:/role.class")); 
       ObjectInputStream objectInputStream = new ObjectInputStream(fileInputStream); 
        System.out.println(objectInputStream.readObject());