Question

我正在尝试向我的Java Rest服务器发送一个发布请求，它可以在10个URL上正常工作，但是由于某种原因，我在提供的URL上收到错误404，并在Fiddler中将其检出，并且可以正常工作精细。我的目标是能够将JSON对象发送到服务器，但由于某些原因我不断收到错误404。

这是网址无效的服务：

    import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';
import { Coupon } from '../Entities/coupon';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class CompanyService {

  private CrtCouponURL = 'http://localhost:8080/CouponSystemWeb/rest/company/CrtCoupon'
  private RmvCouponURL ='http://localhost:8080/CouponSystemWeb/rest/company/RmvCoupon'
  private UpdtCouponURL ='http://localhost:8080/CouponSystemWeb/rest/company/UpdtCoupon'
  private GetAllCouponURL ='http://localhost:8080/CouponSystemWeb/rest/company/GetAllCoupons'
  private couponByTypeURL ='http://localhost:8080/CouponSystemWeb/rest/company/TypeCouponsGet'
  constructor(private http:HttpClient){ }

public createCoupon(coupon:Coupon):Observable<Coupon>{
  return this.http.post<Coupon>(this.CrtCouponURL, coupon ,{withCredentials:true})
}
public deleteCoupon(id:number):Observable<Coupon>{
  return this.http.delete<Coupon>(this.RmvCouponURL+'/?id='+id,{withCredentials:true})
}
public updateCoupon(coupon:Coupon):Observable<Coupon>{
  return this.http.put<Coupon>(this.UpdtCouponURL,coupon,{withCredentials:true})
}
public getAllCoupons():Observable<Coupon[]>{
  return this.http.get<Coupon[]>(this.GetAllCouponURL,{withCredentials:true})
}
public getAllCouponsByType(type:string):Observable<Coupon[]>{
  return this.http.get<Coupon[]>(this.couponByTypeURL+'/?type='+type,{withCredentials:true})
}
}

这是具有有效网址的服务：

@Injectable({
  providedIn: 'root'
})
export class AdminService {
  private companyUrl = 'http://localhost:8080/CouponSystemWeb/rest/admin/company'
  private customerUrl = 'http://localhost:8080/CouponSystemWeb/rest/admin/customer'
  private companyCrtUrl = 'http://localhost:8080/CouponSystemWeb/rest/admin/companyCrt'
  private updateCompURL = 'http://localhost:8080/CouponSystemWeb/rest/admin/UpdateComp'
  private customerCrtUrl = 'http://localhost:8080/CouponSystemWeb/rest/admin/CreateCustomer'
  private customerDelUrl = 'http://localhost:8080/CouponSystemWeb/rest/admin/RmvCustomer'
  constructor(private http: HttpClient) { }

  public createCompany(company: Company): Observable<Company> {
    return this.http.post<Company>(this.companyCrtUrl, company, { withCredentials: true })
  }
  public deleteCompany(id: number): Observable<Company> {
    return this.http.delete<Company>("http://localhost:8080/CouponSystemWeb/rest/admin/mycompany/" + id, { withCredentials: true })
  }
  public updateCompany(id: number, company: Company): Observable<Company> {
    company.id = id;
    return this.http.put<Company>(this.updateCompURL, company, { withCredentials: true })
  }
  public getCompany(id: number): Observable<Company> {
    return this.http.get<Company>(this.companyUrl + "?=id" + id, { withCredentials: true })
  }
  public getAllCompanies(): Observable<Company[]> {
    return this.http.get<Company[]>(this.companyUrl, { withCredentials: true })
  }
  public createCustomer(customer: Customer): Observable<Customer> {
    return this.http.post<Customer>(this.customerCrtUrl, customer, { withCredentials: true })
  }
  public deleteCustomer(id: number): Observable<Customer> {
    return this.http.delete<Customer>(this.customerDelUrl + '?id=' + id, { withCredentials: true })
  }
  public updateCustomer(id: number,customer: Customer): Observable<Customer> {
    return this.http.put<Customer>('http://localhost:8080/CouponSystemWeb/rest/admin/UpdtCustomer', customer, { withCredentials: true })
  }
  public getAllCustomer(): Observable<Customer[]> {
    return this.http.get<Customer[]>(this.customerUrl, { withCredentials: true })
  }
}

几点：我没有在数据库中使用SQL。我不使用：InMemoryDataService。

更新：它与Postman都不起作用。

后端代码：

@Path("company")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public class CompanyService {

    @Context
    private HttpServletRequest requst;

    @POST
    @Path(" couponCrt")
    public Response createCoupon(Coupon coupon) {
        HttpSession session = requst.getSession(false);
        CompanyFacade companyFacade = (CompanyFacade) session.getAttribute("companyFacade");
        try {
            companyFacade.createCoupon(coupon);
            return Response.status(Status.CREATED).type(MediaType.APPLICATION_JSON).build();
        } catch (Exception e) {
            throw new CouponSystemWebExeption("Error while creating Coupon : " + coupon.getTitle());
        }
    }

Answer 1

对于您的帖子或放置请求，您需要先将其转换为如下所示的json字符串

public createCustomer(customer: Customer): Observable<Customer> {
let body = JSON.stringify(customer);
    return this.http.post<Customer>(this.customerCrtUrl, body, { withCredentials: true })
  }

对于404错误，您可以在浏览器中打开任何获取URL来检查其是否正常工作吗？

即使URL正确，如何在角度7中修复错误404

1 个答案: