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java 对象写入文件头,java使用ObjectOutputStream将对象写入到文件,,下面是要写入类Perso...

邹祺
2023-12-01

java使用ObjectOutputStream将对象写入到文件,,下面是要写入类Perso

下面是要写入类Person的定义,此类需要实现Serializable接口import java.io.Serializable;/** * * @author byrx.net */public class Person implements Serializable { private String firstName; private String lastName; private int age; /** * Creates a new instance of Person */ public Person() { } public String getFirstName() { return firstName; } public void setFirstName(String firstName) { this.firstName = firstName; } public String getLastName() { return lastName; } public void setLastName(String lastName) { this.lastName = lastName; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } //Overriding toString to be able to print out the object in a readable way //when it is later read from the file. public String toString() { StringBuffer buffer = new StringBuffer(); buffer.append(firstName); buffer.append("\n"); buffer.append(lastName); buffer.append("\n"); buffer.append(age); buffer.append("\n"); return buffer.toString(); }}

下面代码使用ObjectOutputStream将对象写入到文件:import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;import java.io.ObjectOutputStream;/** * * @author byrx.net */public class Main { /** * Example method for using the ObjectOutputStream class */ public void writePersons(String filename) { ObjectOutputStream outputStream = null; try { //Construct the LineNumberReader object outputStream = new ObjectOutputStream(new FileOutputStream(filename)); Person person = new Person(); person.setFirstName("James"); person.setLastName("Ryan"); person.setAge(19); outputStream.writeObject(person); person = new Person(); person.setFirstName("Obi-wan"); person.setLastName("Kenobi"); person.setAge(30); outputStream.writeObject(person); } catch (FileNotFoundException ex) { ex.printStackTrace(); } catch (IOException ex) { ex.printStackTrace(); } finally { //Close the ObjectOutputStream try { if (outputStream != null) { outputStream.flush(); outputStream.close(); } } catch (IOException ex) { ex.printStackTrace(); } } } /** * @param args the command line arguments */ public static void main(String[] args) { new Main().writePersons("myFile.txt"); }}

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