Angular2中如何处理多个http请求的结果？

Question

比如有多个http请求:

this.http.get(url1).subscribe(res1=>console.log(res1))
this.http.get(url2).subscribe(res2=>console.log(res2))
this.http.get(url3).subscribe(res3=>console.log(res3))

请问es6/rxjs中有没有什么写法可以等待三个请求结束，然后再进行处理呢？

我在网上找了好几个方案，试了一下都不好使

let http1 = this.http.get(url1).subscribe(res1=>console.log(res1))
let http2 = this.http.get(url2).subscribe(res2=>console.log(res2))
let http3 = this.http.get(url3).subscribe(res3=>console.log(res3))

Observable.fornJoin([http1,http2,http3]).subscribe(res=>console.log(res))
Observable.zip(http1,http2,http3).subscribe(res=>console.log(res))
Observable.merge([http1,http2,http3]).subscribe(res=>console.log(res))

请问该如何实现呢？

Answer 1

解决了https://my.oschina.net/eima/blog/1797481