如何将当前日期转换为角度为2的YYYY-MM-DD格式

我用这一行来获取当前日期

public current_date=new Date();

我得到了这个结果:

Wed Apr 26 2017 10:38:12 GMT+0100 (Afr. centrale Ouest)

我怎样才能将其转换为这种格式

YYYY-MM-DD

Parth Ghiya.. 40

按文档示例

@Component({
  selector: 'date-pipe',
  template: `

    
Today is {{today | date}}
    
Or if you prefer, {{today | date:'fullDate'}}
    
The time is {{today | date:'jmZ'}}
  
`
})
export class DatePipeComponent {
  today: number = Date.now();
}

模板

{{ dateObj | date }}               // output is 'Jun 15, 2015'
{{ dateObj | date:'medium' }}      // output is 'Jun 15, 2015, 9:43:11 PM'
{{ dateObj | date:'shortTime' }}   // output is '9:43 PM'
{{ dateObj | date:'mmss' }}        // output is '43:11'
{{dateObj  | date: 'dd/MM/yyyy'}} // 15/06/2015

要在组件中使用.

@Injectable()
import { DatePipe } from '@angular/common';
class MyService {

  constructor(private datePipe: DatePipe) {}

  transformDate(date) {
    this.datePipe.transform(myDate, 'yyyy-MM-dd'); //whatever format you need. 
  }
}

在你的app.module.ts中

providers: [DatePipe,...] 

您所要做的就是立即使用此服务.

按文档示例

@Component({
  selector: 'date-pipe',
  template: `

    
Today is {{today | date}}
    
Or if you prefer, {{today | date:'fullDate'}}
    
The time is {{today | date:'jmZ'}}
  
`
})
export class DatePipeComponent {
  today: number = Date.now();
}

模板

{{ dateObj | date }}               // output is 'Jun 15, 2015'
{{ dateObj | date:'medium' }}      // output is 'Jun 15, 2015, 9:43:11 PM'
{{ dateObj | date:'shortTime' }}   // output is '9:43 PM'
{{ dateObj | date:'mmss' }}        // output is '43:11'
{{dateObj  | date: 'dd/MM/yyyy'}} // 15/06/2015

要在组件中使用.

@Injectable()
import { DatePipe } from '@angular/common';
class MyService {

  constructor(private datePipe: DatePipe) {}

  transformDate(date) {
    this.datePipe.transform(myDate, 'yyyy-MM-dd'); //whatever format you need. 
  }
}

在你的app.module.ts中

providers: [DatePipe,...] 

您所要做的就是立即使用此服务.

对于Angular 5

app.module.ts

import {DatePipe} from '@angular/common';
.
.
.
providers: [DatePipe]

demo.component.ts

import { DatePipe } from '@angular/common';
.
.
constructor(private datePipe: DatePipe) {}

ngOnInit() {
   var date = new Date();
   console.log(this.datePipe.transform(date,"yyyy-MM-dd")); //output : 2018-02-13
}

更多信息angular/datePipe