angular5 httpclient的示例实战

import { Injectable } from '@angular/core';import { HttpClient, HttpResponse } from '@angular/common/http';import { Observable } from 'rxjs/Observable';import { HttpDefaultOptions } from './http.default.options';@Injectable()export class Service { private static METHOD_DELTE = 'DELETE'; private static METHOD_POST = 'POST'; private static METHOD_GET = 'GET'; private static METHOD_PUT = 'PUT'; constructor(private httpClient: HttpClient) { } /**  * 将数据上传  * @param data  * @param {Function} func  */ uploadDataPost(data: any, func: Function) {  let url = '/api/test';  this.apiPost(url, data)   .subscribe((response: HttpResponse) => {    func(response);   }, error => {    func(undefined);   }); } /**  * 返回json 格式的obj 对象  * @param url  * @param body  * @param urlSearchParams  * @returns {Observable<{}>}  */ apiPost(url, body, urlSearchParams?: any): Observable<{}> {  let options = {   body: body ? body : null,   params: urlSearchParams,   responseType: 'json'  };  return this.httpClient.request(Service.METHOD_POST, url, options); } /**  * 返回一个obj 对象  * @param url  * @param urlSearchParams url 的查询参数  * @returns {Observable<{}>}  */ apiGet(url, urlSearchParams?: any): Observable<{}> {  let options = {   params: urlSearchParams,   responseType: 'json'  };  return this.httpClient.request(Service.METHOD_GET, url, options); }}