Java序列化和反序列化 Serializable BeanUtils.copyProperties赋值属性方法
代码语言：javascript复制package com.example.core.mydemo.java;
import com.example.core.mydemo.json2.GsonUtils;
import org.springframework.beans.BeanUtils;
import java.io.*;
/**
* Java序列化和反序列化 Serializable BeanUtils.copyProperties赋值属性方法
* Serialization(序列化)：将java对象以一连串的字节保存在磁盘文件中的过程，也可以说是保存java对象状态的过程。序列化可以将数据永久保存在磁盘上(通常保存在文件中)。
*
* deserialization(反序列化)：将保存在磁盘文件中的java字节码重新转换成java对象称为反序列化。
*
* output
*Person object has been serialized.
* Deserialized Person's name is :{"firstName":"John","lastName":"Doe","sex":"男"}
* deserializedPerson=com.example.core.mydemo.java.Person@368102c8
* myPerson=John Doe
* myPerson 2={"firstName":"John","lastName":"Doe"}
*
*/
public class SerializationExample {
public static void main(String[] args) throws IOException, ClassNotFoundException {
// 创建要被序列化的对象
Person person = new Person("John", "Doe");
person.setSex("男");
// 创建输出流
FileOutputStream fileOut = new FileOutputStream("person.ser");
ObjectOutputStream out = new ObjectOutputStream(fileOut);
// 将对象写入输出流
out.writeObject(person);
// 关闭输出流
out.close();
fileOut.close();
System.out.println("Person object has been serialized.");
// 从输入流中读取并反序列化对象
FileInputStream fileIn = new FileInputStream("person.ser");
ObjectInputStream in = new ObjectInputStream(fileIn);
// 从输入流中读取对象
Person deserializedPerson = (Person)in.readObject();
// 打印反序列化后的对象信息
System.out.println("Deserialized Person's name is :" GsonUtils.toJson(deserializedPerson));
// 关闭输入流
in.close();
fileIn.close();
//序列化对象赋值
copy(deserializedPerson);
}
private static void copy(Serializable deserializedPerson) {
System.out.println("deserializedPerson=" deserializedPerson);
//根据属性值来赋值
MyPerson myPerson = new MyPerson();
// Person myPerson = new Person();
//根据属性值来赋值
BeanUtils.copyProperties(deserializedPerson,myPerson);
System.out.println("myPerson=" myPerson.getName());
System.out.println("myPerson 2=" GsonUtils.toJson(myPerson));
}
}
package com.example.core.mydemo.java;
import java.io.Serializable;
public class Person implements Serializable {
private String firstName;
private String lastName;
//transient关键字表示有理的，被修饰的数据不能进行序列化
// private transient String sex;
private String sex;
public Person(){
}
public String getSex() {
return sex;
}
public void setSex(String sex) {
this.sex = sex;
}
public Person(String fname, String lname){
this.firstName = fname;
this.lastName = lname;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFirstName(){
return firstName;
}
public String getLastName(){
return lastName;
}
public String getName(){
return firstName " " lastName;
}
}
package com.example.core.mydemo.java;
import java.io.Serializable;
public class MyPerson implements Serializable {
private String firstName;
private String lastName;
private String firstName2;
private String lastName2;
public MyPerson(){
}
public MyPerson(String fname, String lname){
this.firstName = fname;
this.lastName = lname;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getFirstName2() {
return firstName2;
}
public void setFirstName2(String firstName2) {
this.firstName2 = firstName2;
}
public String getLastName2() {
return lastName2;
}
public void setLastName2(String lastName2) {
this.lastName2 = lastName2;
}
public String getFirstName(){
return firstName;
}
public String getLastName(){
return lastName;
}
public String getName(){
return firstName " " lastName;
}
}
