Angular 4 http通讯 解决服务器参数无法接收问题

1.导入

import { Component, OnInit } from '@angular/core';
import {Observable} from 'rxjs/Observable';
import {Http, RequestOptions, Headers, URLSearchParams} from '@angular/http';
import 'rxjs/add/operator/map';

　　

2. 代码

  clickPost() {
    const url = '接口地址';
    const headers = new Headers({'Content-Type': 'application/x-www-form-urlencoded; charset=UTF-8'});

    const d1 = new URLSearchParams();
    d1.append('param1',  'param1' );
    d1.append('param2',   ' param2' );
    d1.append('param3',   'param3' );

    const options = new RequestOptions({ headers: headers });

    this.http.post(url, d1, options )
      .map(res =>  res.json())
      .subscribe(function (data) {
      console.log(data);
    });

  }

　　参考：https://stackoverflow.com/questions/35212341/angular2-http-post-request-parameters