#鸿蒙通关秘籍#如何在HarmonyOS中实现AES加密的数据持久化存储？

在HarmonyOS中使用AES加密进行数据持久化存储，可以通过封装工具类化简代码使用：

import { PreferencesUtil } from '@pura/harmony-utils';
import { JhEncryptUtils } from './JhEncryptUtils';

// AES 加密存储类
export class JhAESPreferencesUtils {
  // 存储 String 类型
  public static saveString(key: string, value: string) {
    key = JhEncryptUtils.aesEncrypt(key);
    value = JhEncryptUtils.aesEncrypt(value);
    PreferencesUtil.putSync(key, value);
  }

  // 获取 String 类型
  public static getString(key: string): string | null {
    key = JhEncryptUtils.aesEncrypt(key);
    const enValue = PreferencesUtil.getStringSync(key);
    return JhEncryptUtils.aesDecrypt(enValue);
  }

  // 存储 boolean 类型
  public static saveBool(key: string, value: boolean) {
    const newValue = value ? 'TRUE' : 'FALSE';
    JhAESPreferencesUtils.saveString(key, newValue);
  }

  // 获取 boolean 类型
  public static getBool(key: string): boolean {
    const value = JhAESPreferencesUtils.getString(key);
    return value === 'TRUE';
  }

  // 存储 number 类型
  public static saveNumber(key: string, value: number) {
    const newValue = value.toString();
    JhAESPreferencesUtils.saveString(key, newValue);
  }

  // 获取 number 类型
  public static getNumber(key: string): number {
    let value = JhAESPreferencesUtils.getString(key);
    value = value || '0';
    return Number(value);
  }

  // 存储对象
  public static saveModel(key: string, value: Object) {
    const jsonString = JSON.stringify(value);
    JhAESPreferencesUtils.saveString(key, jsonString);
  }

  // 获取对象
  public static getModel(key: string): Object | null {
    const jsonStr = JhAESPreferencesUtils.getString(key);
    return jsonStr ? JSON.parse(jsonStr) : null;
  }

  // 删除单个存储项
  public static delete(key: string) {
    key = JhEncryptUtils.aesEncrypt(key);
    PreferencesUtil.deleteSync(key);
  }

  // 清空所有存储
  public static clear() {
    PreferencesUtil.clear();
  }

  // 检查存储项是否存在
  public static has(key: string): boolean {
    key = JhEncryptUtils.aesEncrypt(key);
    return PreferencesUtil.hasSync(key);
  }
}