1.app.module.ts中注入：

import { FormsModule, ReactiveFormsModule } from '@angular/forms';

@NgModule({declarations: [],imports: [FormsModule,ReactiveFormsModule]
})

2.app.component.ts中注入：

import { FormGroup, FormControl, Validators } from '@angular/forms';

定义校验规则：

ngOnInit() {this.formData = new FormGroup({name: new FormControl(this.name, Validators.compose([Validators.required,])),score: new FormControl(this.score, Validators.compose([Validators.required,this.scoreValueValidator]))});}scoreValueValidator(control: FormControl): any {if (control.value < 0 || control.value > 100) {return { value: {info: '分数必须大于等于0，小于等于100'} };}}

3.app.component.html中使用：

    <form [formGroup]="formData" (ngSubmit) = "onsubmit(formData.value)"><div class="form-group"><label for="name">姓名</label><em>*</em>
字符串<input type="text" class="form-control" [formControlName]="'name'" id="name"><div [hidden]="formData.get('name').valid || formData.get('name').untouched" class="small"><p [hidden]="!formData.hasError('required', 'threshold')">必填项</p></div></div><div class="form-group"><label for="score">分数</label><em>*</em><input type="number" min="0" max="100" class="form-control" formControlName="score" id="score">变量<div [hidden]="formData.get('score').valid || formData.get('score').untouched" class="small"><p [hidden]="!formData.hasError('required', 'score')">必填项</p><p [hidden]="!formData.hasError('value', 'score')">{{formData.getError('value', 'score')?.info}}</p></div><button type="submit" [disabled]="!formData.valid" class="btn btn-sm btn-primary">提交</button></div></form>