change default locale to chinese

src/router.js

 import React from 'react';
 import { Router, Route, Redirect } from 'dva/router';
+import { LocaleProvider } from 'antd';
+import zhCN from 'antd/lib/locale-provider/zh_CN';
 import navData from './common/nav';
 
 function getRoutes(data, level = 0) {
@@ -38,9 +40,11 @@ function getRoutes(data, level = 0) {
 
 function RouterConfig({ history }) {
   return (
+    <LocaleProvider locale={zhCN}>
       <Router history={history}>
         {getRoutes(navData)}
       </Router>
+    </LocaleProvider>
   );
 }