Java/com/study/demo5/DataIO.java

package com.study.demo5;

import java.io.*;

public class DataIO {
  public void writeConfig(String path) {
    try (DataOutputStream dos = new DataOutputStream(
        new FileOutputStream(path))) {

      dos.writeUTF("李华"); // 用户名
      dos.writeInt(25); // 年龄
      dos.writeBoolean(true); // 是否启用
      dos.writeDouble(1234.56); // 余额

      System.out.println("配置写入成功: " + path);

    } catch (IOException e) {
      System.err.println("写入配置失败: " + e.getMessage());
    }
  }

  public void readConfig(String path) {
    try (DataInputStream dis = new DataInputStream(
        new FileInputStream(path))) {

      String username = dis.readUTF();
      int age = dis.readInt();
      boolean enabled = dis.readBoolean();
      double balance = dis.readDouble();

      System.out.println("用户名: " + username);
      System.out.println("年龄: " + age);
      System.out.println("是否启用: " + enabled);
      System.out.println("余额: " + balance);

    } catch (IOException e) {
      System.err.println("读取配置失败: " + e.getMessage());
    }
  }
}