java 对象序列化要序列化那些内容

1.java的对象序列化，只保存对象的类型信息和属性类型和属性值，三部分数据。对象中的方法，不管有多少，都不会进行序列化。

 package com.hs.javafan;import java.io.Serializable;public class SerializableObject implements Serializable {private String name;private int age;private String address;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String toString(){return "test";}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}}

去除：

 public String toString(){
  return "test";
 }

package com.hs.javafan;import java.io.Serializable;public class SerializableObject implements Serializable {private String name;private int age;private String address;public String getName() {return name;}public void setName(String name) {this.name = name;}public int getAge() {return age;}public void setAge(int age) {this.age = age;}public String getAddress() {return address;}public void setAddress(String address) {this.address = address;}}

 

package com.hs.javafan;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectOutputStream;public class SerializableTest {/** * @param args */public static void main(String[] args) {SerializableObject serializableObject = new SerializableObject();serializableObject.setName("kaiserfan");serializableObject.setAge(30);serializableObject.setAddress("hangzhou");try {FileOutputStream out = new FileOutputStream("test.txt");ObjectOutputStream objectOut = new ObjectOutputStream(out);objectOut.writeObject(serializableObject);out.close();objectOut.close();} catch (FileNotFoundException e) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}}

文件大小结果一样。

 

不管SerializableObject对象中增加多少方法，序列化时，只会保存对象类型，属性类型和属性值，这三个数据信息。