利用node压缩、合并js,css,图片

1.安装nodejs

http://nodejs.org/

2.安装各自的node package

js我用的是UglifyJS github地址：https://github.com/mishoo/UglifyJS

css我用的是clean-css github地址：https://github.com/GoalSmashers/clean-css

图片用的是node-smushit    github地址：https://github.com/colorhook/node-smushit

3.编写代码

//js
var fs = require('fs');
var jsp = require("uglify-js").parser;
var pro = require("uglify-js").uglify; 

function jsMinifier(flieIn, fileOut) {
     var flieIn=Array.isArray(flieIn)? flieIn : [flieIn];
     var origCode,ast,finalCode='';
     for(var i=0; i<flieIn.length; i++) {
        origCode = fs.readFileSync(flieIn[i], 'utf8');
        ast = jsp.parse(origCode);
        ast = pro.ast_mangle(ast);
        ast= pro.ast_squeeze(ast); 
        finalCode +=';'+ pro.gen_code(ast);
     }
    fs.writeFileSync(fileOut, finalCode, 'utf8');
}

//jsMinifier('./file-src/test2.js', './file-smin/test-min.js');  //单个文件压缩
jsMinifier(['./file-src/test.js','./file-src/test2.js'], './file-smin/test-min.js'); //合并压缩


//css
var cleanCSS = require('clean-css');

function cssMinifier(flieIn, fileOut) {
     var flieIn=Array.isArray(flieIn)? flieIn : [flieIn];
     var origCode,finalCode='';
     for(var i=0; i<flieIn.length; i++) {
        origCode = fs.readFileSync(flieIn[i], 'utf8');
        finalCode += cleanCSS.process(origCode); 
     }
    fs.writeFileSync(fileOut, finalCode, 'utf8');
}
 
//cssMinifier('./file-src/indexw_20120913.css', './file-smin/index.css');  //单个文件压缩
cssMinifier(['./file-src/index_20120913.css','./file-src/indexw_20120913.css'], './file-smin/index.css');

//图片
var imgMinifier = require('node-smushit');
//imgMinifier.smushit('./file-src/images', {recursive: true}); //递归
imgMinifier.smushit('./file-src/images');

 4、编译