java 物件序列化要序列化那些內容

1.java的物件序列化，只儲存物件的型別資訊和屬性型別和屬性值，三部分資料。物件中的方法，不管有多少，都不會進行序列化。

 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(); } } }

檔案大小結果一樣。

 

不管SerializableObject物件中增加多少方法，序列化時，只會儲存物件型別，屬性型別和屬性值，這三個資料資訊。