1.異步讀取
function?fsRead(path)?{
????return?new?Promise((resolve,?reject)?=>?{
????????fs.readFile(path,?{?flag:?'r',?encoding:?'utf-8'?},?function?(err,?data)?{
????????????if?(err)?{
????????????????reject(err)
????????????}?else?{
????????????????resolve(data)
????????????}
????????})
????})
}
調(diào)用：
async?function?ReadList()?{
????let w1?=?await?fsRead('hello.txt')
}
ReadList()
2.異步寫入
function?writes(path,content)?{
????return?new?Promise((resolve,reject)=>{
????????fs.writeFile(path,?content,?{?flag:?'a',?encoding:?'utf-8'?},?function?(err)?{
????????????if?(err)?{
????????????????console.log('寫入出錯(cuò)');
????????????????reject(err)
????????????}?else?{
????????????????console.log('寫入成功');
????????????????resolve()
????????????}
????????})??
????})
}
調(diào)用：
async?function?writeList()?{
????await?writes('lhy.html','<h1>1今天七月1日</h1>')
????await?writes('lhy.html','<h1>2明天七月2日</h1>')
}
writeList(）
