场景：vue启动需要一个端口，服务端启动需要一个端口，需要让vue应用访问服务器的端口

'use strict'
// Template version: 1.3.1
// see http://vuejs-templates.github.io/webpack for documentation.
const path = require('path');
module.exports = {
  dev: {
    // Paths
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    // Various Dev Server settings
    host: 'localhost', // can be overwritten by process.env.HOST
    port: 8081, // vue启动端口
    autoOpenBrowser: true,
    errorOverlay: true,
    notifyOnErrors: true,
    poll: false, // https://webpack.js.org/configuration/dev-server/#devserver-watchoptions-
    proxyTable: {
      '/api': {
        target: 'http://localhost:8080',//vue访问后台服务的端口
        changeOrigin: true,
        pathRewrite: {
          '^/api': '/api'
        }
      }
    },
    devtool: 'cheap-module-eval-source-map',
    cacheBusting: true,
    cssSourceMap: true
  },
  build: {
    index: path.resolve(__dirname, '../dist/index.html'),
    assetsRoot: path.resolve(__dirname, '../dist'),
    assetsSubDirectory: 'static',
    assetsPublicPath: '/',
    productionSourceMap: true,
    devtool: '#source-map',
    productionGzip: false,
    productionGzipExtensions: ['js', 'css'],
    bundleAnalyzerReport: process.env.npm_config_report
  }
}

  '^/api': '/api'  改为    '^/api': ''  成功了