如何在Angular 7中使用http发布请求获取数据 [英] How to fetch data using http post request in Angular 7
问题描述
我正在Angular7中处理搜索表单"方案.我使用了http POST插入的http GET,尽管它需要通过使用angular作为前端和spring-boot作为后端从mysql数据库中获取json对象数组.所有后端部分都已实现,由于我使用了Http POST请求,因此我无法将这些数据传递到前端.
I am working on a "Searching Forms" scenario in Angular7. I have used http POST insted http GET although it needs to fetch an json object arrays from mysql database by using angular as frontend and spring-boot as backend. All the backend part is implemented and I'm having trouble to get those data to front end because i have used Http POST request.
我也尝试使用Http GET.但是我需要传递一个json嵌套对象.所以我用了POST.
I tried to use Http GET too. But i need to pass an json nested object. So i used POST.
这是我的Spring Boot后端代码:
This is my Spring boot Backend code:
SearchOutput[] search_output;
@PostMapping(value="/service")
@CrossOrigin(origins = "http://localhost:4200",allowedHeaders = "*")
public ArrayList<SearchOutput> SearchContract(@RequestBody SearchContract search_input) throws InterruptedException {
rooms_adults[] rooms_adults2 = search_input.getRooms_adults();
ArrayList<SearchOutput> OutputArray = new ArrayList<SearchOutput>();
SearchOutput singleOutput;
List<Integer> hotel_ids ;
for (rooms_adults r_a : rooms_adults2) {
hotel_ids= trueContdao.getHotelId(search_input.getCheck_in_date(), search_input.getCheck_out_date());
for (int id:hotel_ids){
List<Room_Type> roomTypes = roomTypedao.getHotelRoomType(id,r_a.getTotal_rooms(), r_a.getTotal_adults());
for(Room_Type room:roomTypes){
singleOutput=new SearchOutput(hotelContdao.getHotelName(room.getHotel_id()),room.getRoom_type(), (float) (room.getPrice()*search_input.getTotal_nights()*r_a.getTotal_adults()*r_a.getTotal_rooms()*1.15));
OutputArray.add(singleOutput);
}
}
}
return OutputArray;
}
我的前端代码是
import { Injectable } from '@angular/core';
import { HttpClient ,HttpErrorResponse, HttpHeaders} from '@angular/common/http';
import { SearchOutput } from './SearchOutput.model';
@Injectable({
providedIn: 'root'
})
export class SearchService {
uri = 'http://localhost:9090/tickets';
searchOut: SearchOutput[]
reqHeader = new HttpHeaders({ 'Content-Type': 'application/json','No-Auth':'True' });
constructor(private http: HttpClient) { }
postSearch(SearchData){
return this.http.post<any>(this.uri+'/service',SearchData);
}
}
SearchOutput.model.ts是:
SearchOutput.model.ts is:
export class SearchOutput {
hotel_name: string;
room_type: string;
price: Float32Array;
}
请帮助.预先感谢
推荐答案
1)订阅请求
2)将请求标头作为第三个参数传递到httpOptions中,请参考 http
2) Pass the request headers as third parameter inside httpOptions, refer http
3)使用Proxy.config启用cors,以获取托管在不同主机(HttpVerb +主机名+端口)上的服务的响应,请参考
3) Use Proxy.config to enable cors, to get the response of service hosted on different host(HttpVerb+hostname+port), refer Proxy Configuration
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