js 遍历文件夹中文件内容

const fs = require('fs');
const path = require('path');

function traverseDirectory(dir, callback) {
  fs.readdir(dir, { withFileTypes: true }, (err, files) => {
    if (err) {
      return callback(err);
    }

    let pending = files.length;
    if (!pending) {
      return callback(null);
    }

    files.forEach(file => {
      const filePath = path.join(dir, file.name);

      if (file.isDirectory()) {
        traverseDirectory(filePath, err => {
          if (err) {
            return callback(err);
          }
          if (!--pending) {
            callback(null);
          }
        });
      } else {
        fs.readFile(filePath, 'utf8', (err, data) => {
          if (err) {
            return callback(err);
          }
          console.log(`File: ${filePath}, Content: ${data}`);
          if (!--pending) {
            callback(null);
          }
        });
      }
    });
  });
}

// 使用示例
traverseDirectory('./my-directory', err => {
  if (err) {
    console.error('Error:', err);
  } else {
    console.log('Traversal completed.');
  }
});

if (fs.existsSync(filePath)) {
  // 执行读取操作
}

const util = require('util');
const readdir = util.promisify(fs.readdir);
const readFile = util.promisify(fs.readFile);

async function traverseDirectoryAsync(dir) {
  try {
    const files = await readdir(dir, { withFileTypes: true });
    for (const file of files) {
      const filePath = path.join(dir, file.name);
      if (file.isDirectory()) {
        await traverseDirectoryAsync(filePath);
      } else {
        const data = await readFile(filePath, 'utf8');
        console.log(`File: ${filePath}, Content: ${data}`);
      }
    }
  } catch (err) {
    console.error('Error:', err);
  }
}

// 使用示例
traverseDirectoryAsync('./my-directory');