Merge pull request #17551 in DEC/fineui from master to feature/x

* commit '6c6bc2eb1bc658fb578cc9680cebeea6adc5475e':
  无JIRA任务 路由支持base参数

src/router/router.js

@@ -3127,7 +3127,8 @@
       init: function () {
         this.$router = this._router = BI.Router.$router = $router = new VueRouter({
           mode: this.options.mode,
-          routes: this.options.routes
+          routes: this.options.routes,
+          base: this.options.base,
         });
         this.$router.beforeEach(function (to, from, next) {
           if (to.matched.length === 0) {