在hexo的根目录下执行以下命令：

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npm install gulp -g
npm install gulp-minify-css gulp-uglify gulp-htmlmin gulp-htmlclean gulp --save

接着，在hexo的根目录下新建文件gulpfile.js

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vim gulpfile.js

填入如下内容

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var gulp = require('gulp');
var minifycss = require('gulp-minify-css');
var uglify = require('gulp-uglify');
var htmlmin = require('gulp-htmlmin');
var htmlclean = require('gulp-htmlclean');
// 压缩 public 目录 css
gulp.task('minify-css', function() {
    return gulp.src('./public/**/*.css')
        .pipe(minifycss())
        .pipe(gulp.dest('./public'));
});
// 压缩 public 目录 html
gulp.task('minify-html', function() {
  return gulp.src('./public/**/*.html')
    .pipe(htmlclean())
    .pipe(htmlmin({
         removeComments: true,
         minifyJS: true,
         minifyCSS: true,
         minifyURLs: true,
    }))
    .pipe(gulp.dest('./public'))
});
// 压缩 public/js 目录 js
gulp.task('minify-js', function() {
    return gulp.src('./public/**/*.js')
        .pipe(uglify())
        .pipe(gulp.dest('./public'));
});
// 执行 gulp 命令时执行的任务
gulp.task('default', [
    'minify-html','minify-css','minify-js'
]);

此时，在执行完hexo g之后，执行gulp命令即可对静态资源（JS\CSS）进行打包

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gulp
[21:47:32] Using gulpfile ~/blog/gulpfile.js
[21:47:32] Starting 'minify-html'...
[21:47:32] Starting 'minify-css'...
[21:47:32] Starting 'minify-js'...
[21:47:36] Finished 'minify-css' after 3.79 s
[21:47:44] Finished 'minify-js' after 12 s
[21:47:46] Finished 'minify-html' after 14 s
[21:47:46] Starting 'default'...
[21:47:46] Finished 'default' after 33 μs

以后发布文章的时候使用如下命令：

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hexo clean
hexo g
gulp
hexo d