我是否可以在angular 2+；中不使用cookies的情况下向restApi发送json对象；

我试图在一个（angular2+springMvc+java）web项目中向rest服务发送一个json类型的对象，但这似乎非常困难。我也不会用饼干

是的，请记住设置正确的内容类型标题

constructor(http: HttpClient) {
    let headers = new HttpHeaders();
    headers = headers.set('Content-Type', 'application/json');

   this.http.post(<url>, {jsonData}, { headers });
}

构造函数（http:HttpClient）{
let headers=新的HttpHeaders（）；
headers=headers.set（'Content-Type'，'application/json'）；
this.http.post（，{jsonData}，{headers}）；
}

正如我从您的问题中了解到的，您正在试图找到一种在您的Angular项目中处理http请求的方法

让我们先看看您的项目结构。您必须有一个单独的目录，其中包含与给定模块相关的所有服务

在该目录中，您可以使用

ng g s service name

创建服务，在本例中可以处理http请求

import {Injectable} from '@angular/core';
import {HttpClient, HttpHeaders} from "@angular/common/http";
import {environment} from "../../../../environments/environment";

const BASE_URL = environment.API_PATH;
const WAR = environment.API_WAR;

@Injectable({
  providedIn: 'root'
})
export class ServiceNameService {
  httpOptions = {
    headers: new HttpHeaders({
      'Content-Type': 'application/json',
      'Authorization': 'my-auth-token'
    })
  };

  constructor(private http: HttpClient) {
  }

  getCall() {
    return this.http.get(`${BASE_URL}/${WAR}/your/path/all`);
  }

  getByIdCall(id) {
    return this.http.get(`${BASE_URL}/${WAR}/your/path?id=${id}`);
  }

  deleteByIdCall(id) {
    return this.http.delete(`${BASE_URL}/${WAR}/your/path/delete?id=${id}`);
  }

  postCall(payload: any) {
    return this.http.post(`${BASE_URL}/${WAR}/your/path/save`, payload);
  }

  putCall(id, payload) {
    return this.http.put(`${BASE_URL}/${WAR}/your/path/update?id=${id}`, payload);
  }

}

import {Component, OnInit} from '@angular/core';
import {ServiceNameService} from '../../../services/http-services/service-name.service';

@Component({
  selector: 'app-config-view',
  templateUrl: './config-view.component.html',
  styleUrls: ['./config-view.component.scss']
})
export class ConfigViewComponent implements OnInit {

  constructor(private serviceNameService: ServiceNameService) {
  }

  ngOnInit() {
  }

  loadAll() {
    this.serviceNameService.getCall()
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

  loadById(id) {
    this.serviceNameService.getByIdCall(id)
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

  deleteById(id) {
    this.serviceNameService.deleteByIdCall(id)
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

  save() {
    const payload = {
      test: "test value"
    }
    this.serviceNameService.postCall(payload)
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

  update() {
    const payload = {
      test: "test value updated"
    }
    this.serviceNameService.putCall(id, payload)
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

}

现在您必须在组件中调用它，您需要执行http请求

import {Injectable} from '@angular/core';
import {HttpClient, HttpHeaders} from "@angular/common/http";
import {environment} from "../../../../environments/environment";

const BASE_URL = environment.API_PATH;
const WAR = environment.API_WAR;

@Injectable({
  providedIn: 'root'
})
export class ServiceNameService {
  httpOptions = {
    headers: new HttpHeaders({
      'Content-Type': 'application/json',
      'Authorization': 'my-auth-token'
    })
  };

  constructor(private http: HttpClient) {
  }

  getCall() {
    return this.http.get(`${BASE_URL}/${WAR}/your/path/all`);
  }

  getByIdCall(id) {
    return this.http.get(`${BASE_URL}/${WAR}/your/path?id=${id}`);
  }

  deleteByIdCall(id) {
    return this.http.delete(`${BASE_URL}/${WAR}/your/path/delete?id=${id}`);
  }

  postCall(payload: any) {
    return this.http.post(`${BASE_URL}/${WAR}/your/path/save`, payload);
  }

  putCall(id, payload) {
    return this.http.put(`${BASE_URL}/${WAR}/your/path/update?id=${id}`, payload);
  }

}

import {Component, OnInit} from '@angular/core';
import {ServiceNameService} from '../../../services/http-services/service-name.service';

@Component({
  selector: 'app-config-view',
  templateUrl: './config-view.component.html',
  styleUrls: ['./config-view.component.scss']
})
export class ConfigViewComponent implements OnInit {

  constructor(private serviceNameService: ServiceNameService) {
  }

  ngOnInit() {
  }

  loadAll() {
    this.serviceNameService.getCall()
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

  loadById(id) {
    this.serviceNameService.getByIdCall(id)
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

  deleteById(id) {
    this.serviceNameService.deleteByIdCall(id)
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

  save() {
    const payload = {
      test: "test value"
    }
    this.serviceNameService.postCall(payload)
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

  update() {
    const payload = {
      test: "test value updated"
    }
    this.serviceNameService.putCall(id, payload)
      .subscribe((data: any) => {
          console.log(data);
        }, error => {
          console.log(error);
        }
      );
  }

}

现在，您可以根据需要调用这些方法

希望这有帮助

---

祝你好运

添加更多信息，并尝试告诉您尝试了什么以及isuuesHere：我使用此指南来获得有关可能性的概述，但别忘了阅读以下内容：问题：我无法将json对象从angular端传递到rest服务。另外，从rest获取该对象后，需要进行一些修改，然后再次将其发送到后端