鸿蒙实现获取应用缓存和清理缓存

static async getCacheSize(context:Context): Promise<CacheInfo>{
    let cacheInfo = new CacheInfo();
    // let cacheSize: number = 0;
    let cacheSizeStr: string = "0B";
    let bundleStats = await storageStatistics.getCurrentBundleStats();
    let cacheSize = bundleStats.cacheSize;
     console.log("==================cacheDir>>>>>>>>>"+cacheSize);
     if(cacheSize > (1024*1024*1024)) {
       cacheSizeStr = (cacheSize/(1024*1024*1024)).toFixed(2) + "G";
     }else if(cacheSize > (1024*1024) && cacheSize < (1024*1024*1024)){
       cacheSizeStr = (cacheSize/(1024*1024)).toFixed(2) + "M";
     }else if (cacheSize > 1024 && cacheSize < 1024*1024) {
      cacheSizeStr = (cacheSize/1024).toFixed(2) + "K";
     }else {
      cacheSizeStr = cacheSize + "B";
    }
    cacheInfo.cache_size = cacheSizeStr; // 单位B
    let applicationContext = context.getApplicationContext();
    let cacheDir = applicationContext.cacheDir;
    cacheInfo.cache_path = cacheDir;
    return cacheInfo;
  }

class CacheInfo {
  cache_path: string = "";
  cache_size: string = "";
}

 static clearCache(context:Context){
    let applicationContext = context.getApplicationContext();
    let cacheDir = applicationContext.cacheDir;
    console.log("==================cacheDir>>>>>>>>>"+cacheDir);
    fs.rmdirSync(cacheDir)
    }