一、react-router 4.x

先使用withRouter对组件进行装饰
然后就可以使用this.props.location.pathname获取到了

使用@withRouter语法不支持的话使用export default withRouter(App)

import React from 'react';
import { withRouter } from 'react-router-dom';

@withRouter
export default class App extends React.Component {
    //...
    getPathname = () => {
        console.log(this.props.location.pathname);
    }
    //...
}

二、react-router 5.x

import { useLocation } from 'react-router-dom'

function Breadcrumb() {
  const location = useLocation();
  console.log(location.pathname);
  return (<div>Path : {location.pathname}</div>);
}