react-router的4.X版本的方法引入和网上常见教程有了一些区别，建议最好看官网文档
import { Link } from ‘react-router-dom‘
<Link to="/about">About</Link>
import { Router } from ‘react-router‘
import createBrowserHistory from ‘history/createBrowserHistory‘
const history = createBrowserHistory()
<Router history={history}>
<App/>
</Router>
import { BrowserRouter as Router, Route } from ‘react-router-dom
原文：http://www.cnblogs.com/aprilwind/p/7404026.html