java将对象写入txt文件

可以使用Java的ObjectOutputStream将对象写入二进制文件，然后使用BufferedWriter将二进制文件转换为文本文件。以下是一个示例代码：

import java.io.*;

public class WriteObjectToFile {

   public static void main(String[] args) {
   
    // Create an instance of the object you want to serialize
    // For example, a Person object with name and age fields
    Person person = new Person("John Doe", 30);
    
    try {

        // Create a new ObjectOutputStream to write the object to a binary file
        ObjectOutputStream out = new ObjectOutputStream(new FileOutputStream("person.bin"));

        // Write the object to the binary file
        out.writeObject(person);
        out.close();

        // Convert the binary file to a text file using BufferedFile and FileWriter
        BufferedReader in = new BufferedReader(new InputStreamReader(new FileInputStream("person.bin")));
        FileWriter fw = new FileWriter("person.txt");
        String s;
        while((s = in.readLine()) != null) {
            fw.write(s);
        }
        in.close();
        fw.close();

    } catch (IOException e) {
        e.printStackTrace();
    }   
   }
}

class Person implements Serializable {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    @Override
    public String toString() {
        return "Person [name=" + name + ", age=" + age + "]";
    }   
}