灏天阁

NODEJS[06]:fs模块_文件读取

· Yin灏

文件读取

方法 说明
readFile 异步读取
readFileSync 同步读取
createReadStream 流式读取

readFile 异步读取

fs.readFile("./file.txt", (err, data) => {
  if (err) {
    console.log("读取失败");
    return;
  }
  console.log(data.toString());
});

readFileSync 同步读取

let data = fs.readFileSync("./file.txt");
console.log(data.toString());

createReadStream 流式读取

const rs = fs.createReadStream("../video.mp4");
rs.on("data", (chunk) => {
  console.log(chunk.length);
});
rs.on("end", () => {
  console.log("读取完成");
});

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