1.把文件放在项目目录src/assets文件下

2.在项目是用a标签下载

        <a:href="require('@/assets/download.pdf')"download="使用说明.pdf"target="_blank"><img src="@/assets/banner.png" class="bannerimg"/></a>

以上项目运行会报错

Failed to compile.
./src/assets/download.pdf 1:0 Module parse failed: Unexpected token (1:0) You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders (Source code omitted for this binary file)

3.需要在vue.config.js中配置！！！

具体配置代码：
 

 configureWebpack: {name: name,resolve: {alias: {'@': resolve('src')}},module: {rules: [{test: /\.pdf$/,use: [{loader: 'url-loader',options: {name: 'files/[name].[ext]'}}]}]}},