新增键值型数据库，简单封装

+import { distributedKVStore } from '@kit.ArkData';
+import { BusinessError } from '@kit.BasicServicesKit';
+import { AppUtils } from './AppUtils';
+import { Logger } from './Logger';
+
+const TAG = 'KVStoreHelper'
+
+/**
+ * 键值型数据库管理类，类似sp，存储变大，单条数据，value<4M
+ */
+export class KVStoreHelper {
+  private static _context: Context;
+  // TODO 待优化，可以指定数据库名，创建多个数据库。当前没有需求，只创建一个，缓存接口数据用。
+  private static _default_store_id: string = 'default_kv_store';
+  private kvManager: distributedKVStore.KVManager | undefined = undefined;
+  private kvStore: distributedKVStore.SingleKVStore | undefined = undefined;
+
+  private constructor() {
+    Logger.error(TAG, 'constructor')
+  }
+
+  static init(context: Context) {
+    Logger.error(TAG, 'init')
+    KVStoreHelper._context = context;
+    KVStoreHelper.default.createKVManager()
+    KVStoreHelper.default.createKVStore()
+  }
+
+  // 静态属性
+  static default: KVStoreHelper = new KVStoreHelper();
+
+  private createKVManager() {
+    if (this.kvManager) {
+      return
+    }
+    if (!KVStoreHelper._context) {
+      Logger.fatal(TAG, 'context is null, must be initialized first')
+      return
+    }
+    let context: Context = KVStoreHelper._context;
+    const kvManagerConfig: distributedKVStore.KVManagerConfig = {
+      context: context,
+      bundleName: AppUtils.getPackageName(context)
+    };
+    try {
+      // 创建KVManager实例
+      this.kvManager = distributedKVStore.createKVManager(kvManagerConfig);
+      Logger.info(TAG, 'Succeeded in creating KVManager.');
+      // 继续创建获取数据库
+    } catch (e) {
+      let error = e as BusinessError;
+      Logger.error(TAG, `Failed to create KVManager. Code:${error.code},message:${error.message}`);
+    }
+  }
+
+  private createKVStore() {
+    if (this.kvStore) {
+      return
+    }
+    if (!this.kvManager) {
+      this.createKVManager()
+      // 直接拦截，避免陷入循环
+      Logger.error(TAG, 'kvManager is null, please re-create it and try again')
+      return
+    }
+    try {
+      const options: distributedKVStore.Options = {
+        createIfMissing: true,
+        encrypt: false,
+        backup: false,
+        autoSync: false,
+        // kvStoreType不填时，默认创建多设备协同数据库
+        kvStoreType: distributedKVStore.KVStoreType.SINGLE_VERSION,
+        securityLevel: distributedKVStore.SecurityLevel.S1
+      };
+      this.kvManager?.getKVStore<distributedKVStore.SingleKVStore>(KVStoreHelper._default_store_id, options,
+        (err, store: distributedKVStore.SingleKVStore) => {
+          if (err) {
+            Logger.error(TAG, `Failed to get KVStore: Code:${err.code},message:${err.message}`);
+            return;
+          }
+          Logger.info(TAG, 'Succeeded in getting KVStore.');
+          this.kvStore = store;
+          // 请确保获取到键值数据库实例后，再进行相关数据操作
+        });
+    } catch (e) {
+      let error = e as BusinessError;
+      Logger.error(TAG, `An unexpected error occurred. Code:${error.code},message:${error.message}`);
+    }
+  }
+
+  private checkStoreCreated() {
+    if (!this.kvManager) {
+      this.createKVManager()
+    }
+    if (!this.kvStore) {
+      this.createKVStore()
+    }
+  }
+
+  get(key: string, def: boolean | string | number | Uint8Array): Promise<boolean | string | number | Uint8Array> {
+    // this.checkStoreCreated()
+    return new Promise<boolean | string | number | Uint8Array>((success, failed) => {
+      try {
+        this.kvStore?.get(key, (err, data) => {
+          if (err != undefined) {
+            Logger.debug(TAG, `Failed to get data. Code:${err.code},message:${err.message}`);
+            success(def)
+            return;
+          }
+          success(data)
+          Logger.debug(TAG, `Succeeded in getting data. Data:${data}`);
+        });
+      } catch (e) {
+        success(def)
+        let error = e as BusinessError;
+        Logger.error(TAG, `Failed to get data. Code:${error.code},message:${error.message}`);
+      }
+    });
+  }
+
+  put(key: string, value: boolean | string | number | Uint8Array) {
+    // this.checkStoreCreated()
+    try {
+      this.kvStore?.put(key, value, (err) => {
+        if (err !== undefined) {
+          Logger.debug(TAG, `Failed to put data. Code:${err.code},message:${err.message}`);
+          return;
+        }
+        Logger.debug(TAG, 'Succeeded in putting data.');
+      });
+    } catch (e) {
+      let error = e as BusinessError;
+      Logger.error(TAG, `An unexpected error occurred. Code:${error.code},message:${error.message}`);
+    }
+  }
+
+  del(key: string) {
+    // this.checkStoreCreated()
+    try {
+      this.kvStore?.delete(key, (err) => {
+        if (err !== undefined) {
+          Logger.debug(TAG, `Failed to delete data. Code:${err.code},message:${err.message}`);
+          return;
+        }
+        Logger.debug(TAG, 'Succeeded in deleting data.');
+      });
+    } catch (e) {
+      let error = e as BusinessError;
+      Logger.error(TAG, `An unexpected error occurred. Code:${error.code},message:${error.message}`);
+    }
+  }
+}
\ No newline at end of file

@@ -4,7 +4,7 @@ import { Logger } from './Logger';
 const TAG = 'SPHelper'
 
 /**
- * sp存储
+ * sp存储，单条数据，value<1k；业务数据超过1k的，建议使用KVStoreHelper
  */
 export class SPHelper {
   private static context: Context;