ionic 网络请求 get ,post

1）post请求
getDefaultAjaxHeaders(): Headers {
var headers = new Headers({
'Content-Type': "application/x-www-form-urlencoded; charset=UTF-8"
})
return headers;
}
let params: URLSearchParams = new URLSearchParams();
let header =getDefaultAjaxHeaders();
let options = new RequestOptions({ headers: header });
return this.http.post(url, params, options).map(res => res.json());
2）get请求
let params: URLSearchParams = new URLSearchParams();
return this.http.get(url, { search: params })
.map(res => res.json());