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标题: java 序列化对象 serializable 读写数据的经典小例子 [打印本页]

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作者: 花海1989    时间: 2013-9-11 20:08
标题: java 序列化对象 serializable 读写数据的经典小例子
序列化对象：
代码如下:
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();
}
}



代码如下:

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： 代码如下:

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");
}
}

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作者: 神之梦    时间: 2013-9-11 20:27


{:soso_e136:}

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作者: 俊潇    时间: 2014-1-4 12:35
学习一下。

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