java 序列化对象 serializable 读写数据的实例

序列化对象：

package com.chen.seriaizable;

import java.io.serializable;
import java.util.list;

@suppresswarnings("serial")
public class student implements serializable
{
 private string name;

 private string id;

 private int age;

 private list<student> students;

 public string getname()
 {
  return name;
 }

 public void setname(string name)
 {
  this.name = name;
 }

 public string getid()
 {
  return id;
 }

 public void setid(string id)
 {
  this.id = id;
 }

 public int getage()
 {
  return age;
 }

 public void setage(int age)
 {
  this.age = age;
 }

 public list<student> getstudents()
 {
  return students;
 }

 public void setstudents(list<student> students)
 {
  this.students = students;
 }

 @override
 public string tostring()
 {
  stringbuffer stringbuffer = new stringbuffer();
  stringbuffer.append("id：" + this.id).append("\n");
  stringbuffer.append("name：" + this.name).append("\n");
  stringbuffer.append("age：" + this.age).append("\n");

  return stringbuffer.tostring();
 }
}

package com.chen.seriaizable;

import java.io.fileinputstream;
import java.io.fileoutputstream;
import java.io.ioexception;
import java.io.objectinputstream;
import java.io.objectoutputstream;
import java.util.arraylist;
import java.util.list;

public class savestudent
{
 private student student;
 // 序列化文件保存位置
 private string path = "c:/student.serializable";

 public void writestudent()
 {
  list<student> students = new arraylist<student>();
  student = new student();

  student student1 = new student();
  student1.setage(1);
  student1.setid("1");
  student1.setname("张1");
  students.add(student1);

  student student2 = new student();
  student2.setage(2);
  student2.setid("2");
  student2.setname("张2");
  students.add(student2);

  student student3 = new student();
  student3.setage(3);
  student3.setid("3");
  student3.setname("张3");
  students.add(student3);

  student student4 = new student();
  student4.setage(4);
  student4.setid("4");
  student4.setname("张4");

  student student41 = new student();
  student41.setage(41);
  student41.setid("41");
  student41.setname("张41");
  list<student> students4 = new arraylist<student>();
  students4.add(student41);

  student4.setstudents(students4);

  students.add(student4);
 

  student.setage(500);
  student.setid("100");
  student.setname("张a000");
  student.setstudents(students);
  try
  {
   objectoutputstream objectoutputstream = new objectoutputstream(new fileoutputstream(path));

   objectoutputstream.writeobject(student);

   objectoutputstream.close();
  }
  catch (ioexception e)
  {
   // todo auto-generated catch block
   e.printstacktrace();
  }
  system.out.println("写完");
 }

 public void readstudent()
 {
  try
  {
   objectinputstream objectinputstream = new objectinputstream(new fileinputstream(path));

   student = (student) objectinputstream.readobject();

   system.out.println(student.getage());

   objectinputstream.close();
  }
  catch (exception e)
  {
   e.printstacktrace();
  }
  system.out.println("读完");
 }

 @override
 public string tostring()
 {
  readstudent();
  stringbuffer stringbuffer = new stringbuffer(100);

  studenttostring(stringbuffer, student);

  return stringbuffer.tostring();
 }

 public void studenttostring(stringbuffer stringbuffer, student studentobj)
 {
  if (student != null)
  {
   stringbuffer.append("id：" + studentobj.tostring()).append("\n");
   if (studentobj.getstudents() != null)
   {
    stringbuffer.append("\n[\n");
    for (student bean : studentobj.getstudents())
    {
     studenttostring(stringbuffer, bean);
    }
    stringbuffer.append("\n]\n");
   }
  }
 }

}

测试类：

package com.chen.seriaizable;

public class test
{
 /**
  * @param args
  */
 public static void main(string[] args)
 {
  savestudent savestudent = new savestudent();
  // 1 先执行写入文件
//  savestudent.writestudent();
  // 2 再读取
  system.out.println(savestudent);
  system.out.println("读完");
 }

}