问未定义的ReferenceError:链接未定义

EN

Uncaught ReferenceError: Link is not defined

import React from 'react'
import { Link } from 'react-router'

export default React.createClass({
  render() {
    return <Link {...this.props} activeClassName="active"/>
  }
})

var webpack = require('webpack')

module.exports = {
  entry: './src/client/js/index.js',

  output: {
    path: 'public',
    filename: 'bundle.js',
    publicPath: '/'
  },

  resolve: {
    extensions: ['', '.js', '.jsx']
  },

  plugins: process.env.NODE_ENV === 'production' ? [
    new webpack.optimize.DedupePlugin(),
    new webpack.optimize.OccurrenceOrderPlugin(),
    new webpack.optimize.UglifyJsPlugin()
  ] : [],

  module: {
    loaders: [
      { test: /\.js$/, exclude: /node_modules/, loader: 'babel-loader?presets[]=es2015&presets[]=react' },
      { test: /\.scss$/, loaders: ['style', 'css', 'sass']}
    ]
  },

}

import router from 'react-router'
console.info(router); //undefined