【发布时间】：2024-01-08 11:51:01
【问题描述】：
当我尝试将 post 请求从 Angular 发送到 Spring Boot 时遇到问题。我必须面对 404 Not Found 错误。这是我的角度服务代码：
import { DonatorDTO } from '../models/donatorDTO';
import { HttpHeaders, HttpClient } from "@angular/common/http";
import { Injectable } from '@angular/core';
import { BehaviorSubject, Observable } from 'rxjs';
@Injectable({
providedIn: 'root'
})
export class DonatorsService {
private watKrewDonationUrl = "http://localhost:8080/donators";
constructor(private _http: HttpClient){}
public addDonator(donatorDTO: DonatorDTO): Observable<DonatorDTO>{
return this._http.post<DonatorDTO>(this.watKrewDonationUrl, donatorDTO);
}
}
这里是角度组件代码：
import { DonatorDTO } from './../../models/donatorDTO';
import { DonatorsService } from './../../services/donators.service';
import { Component, OnInit } from '@angular/core';
import { FormBuilder, FormControl, FormGroup, NgForm, Validators } from '@angular/forms';
@Component({
selector: 'app-donators',
templateUrl: './donators.component.html',
styleUrls: ['./donators.component.css']
})
export class DonatorsComponent implements OnInit {
donatorForm: NgForm;
constructor(private donatorService: DonatorsService) {}
ngOnInit(): void {
}
donatorDTO: DonatorDTO = new DonatorDTO();
companies: string [] =['1. kompania','2. kompania','3. kompania','4. kompania','5. kompania','6. kompania','7. kompania','8. kompania',
'9. kompania','10. kompania','11. kompania','12. kompania','13. kompania','14. kompania','15. kompania','16. kompania',
'17. kompania','18. kompania','19. kompania','20. kompania','21. kompania'];
bloodGroups: string [] = ['A+', 'A-', 'B+', 'B-', 'AB+', 'AB-', '0+', '0-'];
ranks: string [] = ['szer. pchor.', 'st. szer. pchor.', 'kpr. pchor.', 'st. kpr. pchor.', 'plut. pchor.', 'sierż. pchor.'];
createDonator() {
console.log(this.donatorDTO);
this.donatorService.addDonator(this.donatorDTO).subscribe(data => {
console.log(data)
})
}
}
这是.html代码
<!DOCTYPE html>
<html lang="pl-PL">
<body>
<div class="container">
<div class="col-md-6">
<form #donatorForm="ngForm" (ngSubmit) = "createDonator()" >
<div class="form-group">
<input type="text" class = "form-control" [(ngModel)]="donatorDTO.name" name="name" placeholder="np. Jan" >
<small id="nameHelp" class="form-text text-muted">Podaj imię dawcy</small>
</div>
<div class="form-group">
<input type="text" class = "form-control" [(ngModel)]="donatorDTO.surname" name="surname" placeholder="np. Kowalski" >
<small id="surnameHelp" class="form-text text-muted">Podaj nazwisko dawcy</small>
</div>
<div class="form-group">
<input type="email" class = "form-control" [(ngModel)]="donatorDTO.email" name="email" placeholder="np. jan.kowalski@wp.pl" >
<small id="emailHelp" class="form-text text-muted">Podaj email na którego dawca będzie otrzymywał wiadomości związane z HDK</small>
</div>
<div class="form-group">
<select class="form-control" [(ngModel)]="donatorDTO.militaryRank" name="militaryRank">
<option *ngFor="let rank of ranks" [ngValue]="rank">{{rank}}</option>
</select>
<small id="rankHelp" class="form-text text-muted">Podaj stopień wojskowy</small>
</div>
<div class="form-group">
<select [(ngModel)]="donatorDTO.companyName" name="company" >
<option *ngFor="let cmp of companies" [ngValue]="cmp">{{cmp}}</option>
</select>
<small id="companyHelp" class="form-text text-muted">Wybierz pododdział dawcy</small>
</div>
<div class="form-group">
<select [(ngModel)]="donatorDTO.bloodGroup" name="bloodGroup" >
<option *ngFor="let blood of bloodGroups" [ngValue]="blood">{{blood}}</option>
</select>
</div>
<div class="form-group">
<button class = "btn btn-success" type="submit">Dodaj dawcę do bazy</button>
</div>
</form>
</div>
</div>
</body>
</html>
这是模型组件：
export class DonatorDTO {
name: string;
surname: string;
email: string;
militaryRank: string;
companyName: string;
bloodGroup: string;
}
现在是springboot服务代码：
public void addDonator(DonatorDTO donatorDTO) throws MailException {
if (donatorRepository.existsByEmail(donatorDTO.getEmail())) {
throw new RuntimeException("User with this e-mail already exists in db");
} else {
Donator donator = new Donator();
Company company = companyRepository.findByCompanyName(donatorDTO.getCompanyName()).orElseThrow(() -> new ResourceNotFoundException("Company not found"));
BloodGroup blood = bloodGroupRepository.findBloodGroupByBloodType(donatorDTO.getBloodGroup()).orElseThrow(() -> new ResourceNotFoundException("Blood group not found"));
donator.setName(firstLetterToUpperCase(donatorDTO.getName()));
donator.setSurname(firstLetterToUpperCase(donatorDTO.getSurname()));
donator.setEmail(donatorDTO.getEmail());
donator.setMilitaryRank(donatorDTO.getMilitaryRank());
donator.setCompany(company);
donator.setBloodGroup(blood);
blood.setNumberOfDonators(blood.getNumberOfDonators() + 1);
donator.setNextDonationDate(LocalDate.now());
donator.setIsCapable(true);
donatorRepository.save(donator);
try {
mailService.helloNotification(donatorDTO);
} catch (MailException mailException) {
logger.error("Can't send email with confirmation of addition donator in a database");
logger.error(mailException.getMessage());
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (MessagingException e) {
e.printStackTrace();
}
}
}
和控制器代码：
@RestController
public class DonatorController {
@Autowired
private final DonatorService donatorService;
private final MailService mailService;
public DonatorController(DonatorService donatorService, MailService mailService) {
this.donatorService = donatorService;
this.mailService = mailService;
}
@PostMapping(value = "donators")
public ResponseEntity addDonator(@RequestBody DonatorDTO donatorDTO) {
donatorService.addDonator(donatorDTO);
return new ResponseEntity<>(HttpStatus.OK);
}
}
如果有人解决我的问题，我将不胜感激
【问题讨论】：
标签： angular spring-boot post httprequest http-status-code-404