java--对象自定义序列化简单应用，用于性能的优化

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代码如下，先是Students类：

package TestDemo;import java.io.Serializable;import java.util.ArrayList;public class Students implements java.io.Serializable {private String number;private String name;//自定义序列化，用于可以不传递不需要的对象或者对代码进行性能的优化private    transient int age;public Students(){}public Students(String number, String name, int age) {super();this.number = number;this.name = name;this.age = age;}@Overridepublic String toString() {return "学号"+this.getNumber()+this.getName()+this.getAge();}public String getNumber() {return number;}public void setNumber(String number) {this.number = number;}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;} private void writeObject(java.io.ObjectOutputStream s)        throws java.io.IOException{  s.defaultWriteObject();//将java虚拟机默认序列化的元素进行序列化 s.writeInt(age);//自己完成age的序列化 }   private void readObject(java.io.ObjectInputStream s)        throws java.io.IOException, ClassNotFoundException {   s.defaultReadObject();   this.age=s.readInt();   }    }

将文件中保存的对象进行输出：

<pre name="code" class="java">package TestDemo;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import java.io.OutputStream;import java.lang.reflect.Array;import java.util.ArrayList;//自定义序列化public class Define {//用总计的方法进行序列化public  static  void d1() throws Exception{File file1= new  File("t3.dat");if(!file1.exists()){file1.createNewFile();}ObjectOutputStream oos= new  ObjectOutputStream(new  FileOutputStream(file1));Students stu= new Students("2018","tom",90);oos.writeObject(stu);//添加文件进对象oos.flush();oos.close();System.out.println("添加成功");//反序列化，将文件中的对象读写出来ObjectInputStream ois= new  ObjectInputStream(new  FileInputStream(file1));          Students s1=(Students)ois.readObject();System.out.println(s1);ois.close();}public static void main(String[] args) {try {d1();} catch (Exception e) {e.printStackTrace();}}}

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