安裝： npm install react-router-dom –save

<Provider store={store}>
        <BrowserRouter>
            <div>
                <ul>
                    <li>
                        <Link to='/'>一營</Link>
                    </li>
                    <li>
 

                        <Link to="erying">二營</Link>
                    </li>
                    <li>
                        <Link to="sanying">三營</Link>
                    </li>
                </ul>
                <Route path="/" exact component={App}
 
></Route>
                <Route path="/erying" exact component={Erying}></Route>
                <Route path="/sanying" exact component={Sanying}></Route>
            </div>
        </BrowserRouter>
    </Provider>