fs模块(二)

1. renameSync

　　01. 重命名

　　02. 移动文件夹,相当于剪切作用

 var fs = require('fs');
 // 01 文件重命名
 var renameFile = (oldFile,newFile) =>{
     let result = fs.renameSync(oldFile,newFile);
     if(!result){
         console.log(`${oldFile}文件名成功修改为${newFile}`);
     }
 }
 renameFile('./js/01 test.js','./js/01 tested.js');

 //02 文件夹移动 将js文件夹移动到public目录下
 function rename(oldPath,newPath){
     var result = fs.renameSync(oldPath,newPath);
     if(!result){
         console.log(`${oldPath}已经移入新文件夹`);
     }
 }
 rename('./public/js','./js');

2. watch

 //03 watch 文件 文件夹监听
 /* 监听文件夹
 >01.fs.watch(dirname,listener)
 >02.dirname:文件夹路径/文件路径
 >03.listener(event,filename)
 >04.event:'rename/change'
 >05.filename:改变的文件名
 */
 function listener(event, filename) {

     console.log('event', event)
     console.log('filename', filename)
 }

 function watch(dirname) {
     fs.watch(dirname, listener);
     console.log(`监听目录${dirname}`);
 }
  watch('./js');

3. watchFile

 //04 watchFile
 /*监听文件
 >01.fs.watchFile(filename,listener)
 >02.filename:文件路径
 >03.listener(curr,prev)
 >04.curr:当前文件
 >05.prev:之前文件
 >06.fs.unwatchFile(filename,listener)
 */
 var listener2 = (current,prev)=>{
     console.log('event',current);
     console.log('filename',prev)
 }
 var watchFile = (dirname)=>{
     fs.watchFile(dirname,listener2);
     console.log(`开始监听文件${dirname}`)
 }
 watchFile('./js/01 tested.js');

4. unwatchFile

配合watchFile使用

 //04 watchFile
 /*监听文件
 >01.fs.watchFile(filename,listener)
 >02.filename:文件路径
 >03.listener(curr,prev)
 >04.curr:当前文件
 >05.prev:之前文件
 >06.fs.unwatchFile(filename,listener)
 */
 var listener2 = (current,prev)=>{
     console.log('event',current);
     console.log('filename',prev)
 }
 var watchFile = (filename)=>{
     fs.watchFile(filename,listener2);
     console.log(`开始监听文件${filename}`)
 }
 watchFile('./js/01 tested.js');

 //05 unwatchFile文件监听解除
 var unwatchFile =(filename,listener)=>{
     fs.unwatchFile(filename,listener);
 }

 setTimeout(()=>{
     unwatchFile('./js/01 tested.js',listener2);
     console.log('停止监听')
 },20000)