Typescript 错误：NG04002：无法匹配任何路由. URL 段：学生

我的路由应用-routing.mode.ts

import { Component, NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { Routes ,RouterModule} from '@angular/router';
import { StudentComponent } from './student/student.component';
import { StudentdetailComponent } from './studentdetail/studentdetail.component';

const routes:Routes=[
{
  path:'student',component:StudentComponent
},
{
  path:'studentdetail',component:StudentdetailComponent
}
];

@NgModule({
  declarations: [],
  imports: [
    CommonModule
  ]
})
export class AppRoutingModule { }

Student.component.html

<p>student works!</p>

Studentdetail.component.html

<p>studentdetail works!</p>

Test.component.html

 <a [routerLink] ="['/student']">Student</a><br/>
<a [routerLink] ="['/studentdetail']">Student Details</a><br/>

<div>
<router-outlet></router-outlet>
</div>

Appmodule.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import {Test} from './test.component';
import { TopComponent } from './top/top.component';
import { AppRoutingModule } from './app-routing.module';
import { StudentComponent } from './student/student.component';
import { StudentdetailComponent } from './studentdetail/studentdetail.component';
import { RouterModule } from '@angular/router';
@NgModule({
  declarations: [
    AppComponent,
    Test,
    TopComponent,
    StudentComponent,
    StudentdetailComponent
  ],
  imports: [
    BrowserModule,
    AppRoutingModule,
    RouterModule.forRoot([])
  ],
  providers: [],
  bootstrap: [Test]
})
export class AppModule { }

当我点击学生和学生详细信息链接时.我在按F12键后出现了错误

Uncaught (in promise): Error: NG04002: Cannot match any routes. URL Segment: 'student' Error: NG04002: Cannot match any routes. URL Segment: 'student'个