react嵌套路由

1、结构目录

2、路由配置文件，参照的vue-router

config.js

import Login from '../view/Login.js';
import System from '../view/System.js';
import Bus from '../view/Bus.js';
import Bus22 from '../view/Bus22.js';

const routes = [
  {
    path: "/",
    component: Login,
    exact: true,
  },
  {
    path: "/system",
    component: System,
    auth:true,
    routes: [
      {
        path: "/system/bus",
        component: Bus,
        exact: true,
        auth:true,
      },
      {
        path: "/system/bus22",
        component: Bus22,
        exact: true,
        auth:true,
      },
    ]
  }
];
export default routes;

3、路由主体，使用react-router-dom，详细文档里面也有其它的例子和API

import routes from './config';
import React, {Component} from 'react';
import {
  BrowserRouter as Router,
  Switch,
  Route,
  Redirect,
} from "react-router-dom";

/*一级路由*/
class First extends Component {
  render() {
    return (
      <Router>
        <Switch>
          {routes.map((route, i) => {
              if (route.auth) {//根据配置是否检测登录
                return (
                  <PrivateRoute key={i} path={route.path}>
                    <route.component/>
                  </PrivateRoute>
                )
              } else {
                return (<RouteWithSubRoutes key={i} {...route} />)
              }
            }
          )}
        </Switch>
      </Router>
    );
  }
}
/*二级路由*/
class SystemRouter extends Component {
  render() {
    return (
        <Switch>
          {routes[1].routes.map((route, i) => {
            if (route.auth) {//根据配置是否检测登录
              return (
                <PrivateRoute  key={i} path={route.path}>
                  <route.component/>
                </PrivateRoute>
              )
            } else {
              return (<RouteWithSubRoutes key={i} {...route} />)
            }
          })}
        </Switch>
    );
  }
}

export {
  First, SystemRouter
};
// A special wrapper for <Route> that knows how to
// handle "sub"-routes by passing them in a `routes`
// prop to the component it renders.
/*开放路由*/
function RouteWithSubRoutes(route) {
  return (
    <Route
      exact={route.exact}
      path={route.path}
      render={props => (
        // pass the sub-routes down to keep nesting
        <route.component {...props} routes={route.routes}/>
      )}
    />
  );
}
/*登录检测路由*/
function PrivateRoute({children, ...rest}) {
  let isAuthenticated = sessionStorage.auth;
  return (
    <Route
      {...rest}
      render={({location}) =>
        isAuthenticated ? (
          children
        ) : (
          <Redirect
            to={{
              pathname: "/",
              state: {from: location}
            }}
          />
        )
      }
    />
  );
}

4、一级路由的使用，在App.js

import React from 'react';
import './App.css';
import {First} from './router/index';

function App() {
  return (
    <First/>
  );
}

export default App;

5、二级路由的使用，在一级路由的组件文件中，本例是System.js

import React,{Component} from 'react';
import {SystemRouter} from '../router/index';
import {
  withRouter
} from "react-router-dom";
import { Menu, Icon } from 'antd';

const { SubMenu } = Menu;
class System extends Component  {
  componentDidMount() {

  }

  handleClick = e => {
    this.props.history.push(e.key)
  };
  render() {
    return (
      <div>
        <header>
          嵌套路由
        </header>
        <Menu
          onClick={this.handleClick}
          style={{  256,float:'left' }}
          defaultSelectedKeys={['1']}
          defaultOpenKeys={['sub1']}
          mode="inline"
        >
          <SubMenu
            key="sub1"
            title={
              <span>
              <Icon type="mail" />
              <span>Navigation One</span>
            </span>
            }
          >
            <Menu.Item key="/system/bus">bus</Menu.Item>
            <Menu.Item key="/system/bus22">bus22</Menu.Item>
          </SubMenu>
      
        </Menu>
        <SystemRouter  style={{ float:'left' }}/>
      </div>
    );
  }
}
export default withRouter(System);

最后来俩效果图，页面分三部分，头部、左侧导航、右侧内容，切换时只有右侧内容变化。