HarmonyOS鸿蒙Next中如何压缩和解压公共目录Documents里面的某个文件夹

通过Environment模块获取Documents目录路径后，将整个文件夹一次性拷贝到沙箱路径，再进行压缩/解压操作

实现步骤

1/获取Documents目录路径并申请权限

import { Environment } from '@kit.CoreFileKit';
import { BusinessError } from '@kit.BasicServicesKit';

async function getDocumentsDir() {
  try {
    const docPath = await Environment.getUserDocumentDir();
    console.info("Documents Path:", docPath);
    return docPath;
  } catch (error) {
    console.error("Error code:", (error as BusinessError).code);
  }
}

在module.json5中添加：

"requestPermissions": [
  {
    "name": "ohos.permission.READ_WRITE_DOCUMENTS_DIRECTORY"
  }
]

2/批量拷贝文件夹到沙箱

import { fileIo as fs } from '@kit.CoreFileKit';

async function copyFolderToSandbox(sourceDir: string, targetDir: string) {
  try {
    // 创建目标目录
    fs.mkdirSync(targetDir);
    // 遍历源目录
    const files = fs.listFileSync(sourceDir);
    files.forEach(file => {
      const srcPath = `${sourceDir}/${file}`;
      const destPath = `${targetDir}/${file}`;
      if (fs.statSync(srcPath).isDirectory()) {
        copyFolderToSandbox(srcPath, destPath); // 递归处理子目录
      } else {
        fs.copyFileSync(srcPath, destPath);
      }
    });
  } catch (error) {
    console.error("Copy failed:", (error as BusinessError).message);
  }
}

3/执行压缩操作

import { zlib } from '@kit.BasicServicesKit';

async function compressFolder() {
  const docPath = await getDocumentsDir();
  const sandboxPath = getContext().filesDir + "/temp_compress";
  
  // 拷贝整个文件夹到沙箱
  await copyFolderToSandbox(docPath + "/target_folder", sandboxPath);
  
  // 压缩文件夹
  const zipPath = getContext().filesDir + "/compressed.zip";
  try {
    await zlib.compressFile(sandboxPath, zipPath);
    // 将压缩包移回Documents目录
    fs.copyFileSync(zipPath, docPath + "/compressed.zip");
  } catch (error) {
    console.error("Compress error:", (error as BusinessError).message);
  }
}

4/执行解压操作

async function decompressFile() {
  const docPath = await getDocumentsDir();
  const zipPath = docPath + "/compressed.zip";
  const sandboxZipPath = getContext().filesDir + "/temp.zip";
  const sandboxUnzipPath = getContext().filesDir + "/uncompressed";
  
  // 拷贝压缩包到沙箱
  fs.copyFileSync(zipPath, sandboxZipPath);
  
  try {
    await zlib.decompressFile(sandboxZipPath, sandboxUnzipPath);
    // 将解压结果移回Documents目录
    await copyFolderToSandbox(sandboxUnzipPath, docPath + "/restored_folder");
  } catch (error) {
    console.error("Decompress error:", (error as BusinessError).message);
  }
}