既然到了后台，只要你有权限就可以为所欲为了！
创建文件夹
//fs.jsvar fs = require('fs');fs.mkdirSync('a', 0755);fs.mkdirSync('a/b', 0755);fs.mkdirSync('a/b/c', 0755); 那么它会在fs.js所在目录中创建一个a目录，a目录下再创建b目录，b目录下创建c目录。mkdirSync是一个同步方法，拥有三个参数，第一个是路径，第二个是，第三个是回调
但这样做有点不妥，如果指定目录已存在，就报错。如果要建立多级目录，一层层判定此目录是否存在，立即会陷入“回调地狱”的境地。虽然node.js对于IO操作的方法都提供了两个版本，一个是同步的，一个是异步的。想了想，搞出我自己的mkdirSync函数，实现比的作者好很多。
var fs = require('fs');function mkdirSync(url,mode,cb){ var path = require("path"), arr = url.split("/"); mode = mode || 0755; cb = cb || function(){}; if(arr[0]==="."){//处理 ./aaa arr.shift(); } if(arr[0] == ".."){//处理 ../ddd/d arr.splice(0,2,arr[0]+"/"+arr[1]) } function inner(cur){ if(!path.existsSync(cur)){//不存在就创建一个 fs.mkdirSync(cur, mode) } if(arr.length){ inner(cur + "/"+arr.shift()); }else{ cb(); } } arr.length && inner(arr.shift());}//测试代码mkdirSync("aaa/ddd/dd",0,function(e){ if(e){ console.log('出错了'); }else{ console.log("创建成功") }}); 有关目录的创建的讨论，详见
创建文件与写入内容
创建文件的方法fs.open(path, flags, [mode], [callback])好像所有语言都很一致，可能是想与最原始的C语言的方法保持一致。这是个异步方法，其同步版本，与其他同步方法一样，就是少了个回调。说一下flags中w与a的不同，w会把已存在的同名文件删除再创建一个，因此要注意。
fs.open("test.txt", "w"); 写入内容。这有几种方法，比如fs.write，不过它的第一个参数要求类型为Buffer，而fs.openSync不是返回一个Buffer，因此它不能与fs.write配合使用。
//fs.jsvar fs = require('fs');fs.open("test.txt","w",0644,function(e,fd){ if(e) throw e; fs.write(fd,"first fs!",0,'utf8',function(e){ if(e) throw e; fs.closeSync(fd); })}); 这时，我们就创建一个文本文件，里面写入"first fs"。不过open中间那两个参数的不是必要的。我们可以再搞一个fs2.js脚本
//fs2.jsvar fs = require('fs');fs.open("test.txt","a",0644,function(e,fd){ if(e) throw e; fs.write(fd,"second fs!",function(e){ if(e) throw e; fs.closeSync(fd); })}); 执行它，它会在test.txt追加"second fs"这句话。
fs的open, write, close有点像我们在浏览器对document的操作。此外，还有fs.writeFile与fs.writeFileSync，可惜它们不能做追加内容的操作。
var fs = require('fs');fs.writeFile("test.txt","third fs!",function(e){//会先清空原先的内容 if(e) throw e;}) 删除目录或文件
var fs = require('fs');fs.rmdir("aaa",function(e){ if(e){ console.log(e) }})/**{ stack: [Getter/Setter], arguments: undefined, type: undefined, message: 'ENOTEMPTY, Directory not empty \'aaa\'', errno: 39, code: 'ENOTEMPTY', path: 'aaa' }*/ 报错，缘由是之前我们还为aaa创建了子目录，必须逐个删除，实在不人性化，于是又造了一个轮子。
var fs = require('fs');var rmdirSync = (function(){ function iterator(url,dirs){ var stat = fs.statSync(url); if(stat.isDirectory()){ dirs.unshift(url);//收集目录 inner(url,dirs); }else if(stat.isFile()){ fs.unlinkSync(url);//直接删除文件 } } function inner(path,dirs){ var arr = fs.readdirSync(path); for(var i = 0, el ; el = arr[i++];){ iterator(path+"/"+el,dirs); } } return function(dir,cb){ cb = cb || function(){}; var dirs = []; try{ iterator(dir,dirs); for(var i = 0, el ; el = dirs[i++];){ fs.rmdirSync(el);//一次性删除所有收集到的目录 } cb() }catch(e){//如果文件或目录本来就不存在，fs.statSync会报错，不过我们还是当成没有异常发生 e.code === "ENOENT" ? cb() : cb(e); } }})();rmdirSync("aaa",function(e){ console.log("!!!"+e) console.log("删除aaa目录以及子目录成功")}) 上面的rmdirSync还可以分解出一个方法，取得给定目录下的所有目录与文件。
var fs = require('fs');var getAllFolersAndFiles = (function(){ function iterator(url, folders, files){ var stat = fs.statSync(url); if(stat.isDirectory()){ folders.unshift(url);//收集目录 inner(url,folders, files); }else if(stat.isFile()){ files.unshift(url);//收集文件 } } function inner(path,folders,files){ var arr = fs.readdirSync(path); for(var i = 0, el ; el = arr[i++];){ iterator(path+"/"+el,folders,files); } } return function(dir){ var folders = [], files = []; try{ iterator(dir,folders,files); }catch(e){ }finally{ return { folders : folders, files : files } } }})() 如果我们只想取得指定目下的所有文件，还可以更精简些！
function getAllFiles(root) { var result = [], files = fs.readdirSync(root) files.forEach(function(file) { var pathname = root+ "/" + file , stat = fs.lstatSync(pathname) if (stat === undefined) return // 不是文件夹就是文件 if (!stat.isDirectory()) { result.push(pathname) // 递归自身 } else { result = result.concat(getAllFiles(pathname)) } }); return result} 监听文件的改动
就是使用watchFile及其同步版本。
var fs = require("fs"),sys = require("util");fs.open("aaa.js","w",0644,function(e,fd){ fs.writeSync(fd,"console.log(1111);"); fs.closeSync(fd);})fs.watchFile("aaa.js", function(curr, prev) { sys.puts("\n\ttest_file.txt has been edited"); sys.puts("\tThe current mtime is: " + curr.mtime); sys.puts("\tThe previous mtime was: " + prev.mtime + "\n");});fs.open("aaa.js","a",0644,function(e,fd){ fs.writeSync(fd,"console.log(2222)"); fs.closeSync(fd);}); 此外，node.js还提供了修改了目录文件权限的操作，但这些都是不值一提。自己看看文档就会了。
//合并脚本var fs = require("fs")var path = require("path") //不同的操作系统，其 文件目录 分割符是不一样的，不能直接使用 + "/"来实现var curDir = process.cwd() //当前目录var otherDir = curDir.replace(/avalon[\/\\]src/, "")console.log("otherDir " + otherDir)var Buffer = require('buffer').Buffervar now = new Datevar date = now.getFullYear() + "." + now.getMonth() + "." + now.getDate()function directive(name) { return path.join("15 directive", name)}//avalon.js 所需要合并的子文件var compatibleFiles = [ "00 inter", "01 variable", "01 variable.share", "02 core", "03 es5.shim", "04 dom.polyfill", "05 configuration", "06 EventBus", "06 findNodes", "07 modelFactory", "07 modelFactory.shim", "08 Collection", "09 dispatcher", "10 HTML", "12 scan", "12 scanTag", "12 scanNode", "12 scanAttr", "12 scanText", "13 dom", "14 parser", "14 parser.share", directive("skip"), directive("controller"), directive("important"), directive("attr"), directive("include"), directive("class.hover.active"), directive("data"), directive("text"), directive("html"), directive("if"), directive("visible"), directive("on"), directive("widget"), directive("duplex.1"), directive("duplex.2"), directive("duplex.3"), directive("repeat.each.with"), "16 filter", "17 loader", "18 domReady", "19 outer"]//avalon.modern.js 所需要合并的子文件var modernFiles = [ "00 inter", "01 variable.modern", "01 variable.share", "02 core.modern", "04 dom.polyfill.modern", "05 configuration", "06 EventBus", "06 findNodes.modern", "07 modelFactory", "08 Collection", "09 dispatcher", "10 HTML.modern", "12 scan", "12 scanTag", "12 scanNode", "12 scanAttr.modern", "12 scanText", "13 dom.modern", "14 parser.modern", "14 parser.share", directive("skip"), directive("controller"), directive("important"), directive("attr"), directive("include"), directive("class.hover.active"), directive("data"), directive("text.modern"), directive("html"), directive("if"), directive("visible"), directive("on"), directive("widget"), directive("duplex.1"), directive("duplex.2.modern"), directive("duplex.3"), directive("repeat.each.with"), "16 filter", "17 loader", "18 domReady.modern", "19 outer"]//avalon.shim.js 所需要合并的子文件var shimFiles = [ "00 inter", "01 variable", "01 variable.share", "02 core", "03 es5.shim", "04 dom.polyfill", "05 configuration", "06 EventBus", "06 findNodes", "07 modelFactory", "07 modelFactory.shim", "08 Collection", "09 dispatcher", "10 HTML", "12 scan", "12 scanTag", "12 scanNode", "12 scanAttr", "12 scanText", "13 dom", "14 parser", "14 parser.share", directive("skip"), directive("controller"), directive("important"), directive("attr"), directive("include"), directive("class.hover.active"), directive("data"), directive("text"), directive("html"), directive("if"), directive("visible"), directive("on"), directive("widget"), directive("duplex.1"), directive("duplex.2"), directive("duplex.3"), directive("repeat.each.with"), "16 filter", "18 domReady.noop", "19 outer"]var writable = fs.createWriteStream(path.join(curDir, 'avalon.js'), { encoding: "utf8"});writable.setMaxListeners(100) //默认只有添加11个事件，很容易爆栈compatibleFiles.forEach(function(fileName) { var filePath = path.join(curDir, fileName + ".js") var readable = fs.createReadStream(filePath) if (fileName == "00 inter") { readable.on('data', function(chunk) { var str = chunk.toString("utf8") var offset = (new Buffer(str.slice(0, str.indexOf("!!")), "utf8")).length chunk.write(" build in " + date + " \n", offset) }) } // readable.push("//都会插到新文件的最前面") // writable.write("//都会插到新文件的最前面 ") readable.pipe(writable) readable.on("readable", function() { writable.write("\n") console.log("add " + filePath) }) //更新avalon.test中的文件 writable.on("finish", function() { var readable3 = fs.createReadStream(path.join(curDir, 'avalon.js')) var writable3 = fs.createWriteStream(path.join(otherDir, 'avalon.test', "src", "avalon.js")) readable3.pipe(writable3) });})var writable2 = fs.createWriteStream(path.join(curDir, 'avalon.modern.js'), { encoding: "utf8"})writable2.setMaxListeners(100) //默认只有添加11个事件，很容易爆栈modernFiles.forEach(function(fileName) { var filePath = path.join(curDir, fileName + ".js") var readable = fs.createReadStream(filePath) if (fileName == "00 inter") { readable.on('data', function(chunk) { var str = chunk.toString("utf8") var offset = (new Buffer(str.slice(0, str.indexOf("!!")), "utf8")).length chunk.write(" build in " + date + " \n", offset) }) } // readable.push("//都会插到新文件的最前面") // writable.write("//都会插到新文件的最前面 ") readable.pipe(writable2) readable.on("readable", function() { writable2.write("\n") console.log("add " + filePath) }) //更新avalon.test中的文件 writable2.on("finish", function() { var readable3 = fs.createReadStream(path.join(curDir, 'avalon.modern.js')) var writable3 = fs.createWriteStream(path.join(otherDir, 'avalon.test', "src", "avalon.modern.js")) readable3.pipe(writable3) });})