Angular如何使用REST处理来自Spring JPA数据的数据

import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';

@Injectable({
  providedIn: 'root'
})
export class DataApiService {
  private apiUrl = 'http://your-api-url'; // 后端服务器的API地址

  constructor(private http: HttpClient) { }

  // 发起GET请求获取数据
  getData() {
    return this.http.get(this.apiUrl);
  }

  // 发起POST请求创建新数据
  createData(data: any) {
    return this.http.post(this.apiUrl, data);
  }

  // 发起PUT请求更新数据
  updateData(id: number, data: any) {
    return this.http.put(`${this.apiUrl}/${id}`, data);
  }

  // 发起DELETE请求删除数据
  deleteData(id: number) {
    return this.http.delete(`${this.apiUrl}/${id}`);
  }
}

import { Component, OnInit } from '@angular/core';
import { DataApiService } from '路径到/DataApiService';

@Component({
  selector: 'app-data',
  templateUrl: './data.component.html',
  styleUrls: ['./data.component.css']
})
export class DataComponent implements OnInit {
  data: any[];

  constructor(private dataApiService: DataApiService) { }

  ngOnInit() {
    this.loadData();
  }

  loadData() {
    this.dataApiService.getData().subscribe((response: any[]) => {
      this.data = response;
    });
  }

  createData() {
    const newData = { /* 新数据对象 */ };
    this.dataApiService.createData(newData).subscribe(() => {
      this.loadData(); // 创建数据后重新加载数据
    });
  }

  updateData(id: number) {
    const updatedData = { /* 更新后的数据对象 */ };
    this.dataApiService.updateData(id, updatedData).subscribe(() => {
      this.loadData(); // 更新数据后重新加载数据
    });
  }

  deleteData(id: number) {
    this.dataApiService.deleteData(id).subscribe(() => {
      this.loadData(); // 删除数据后重新加载数据
    });
  }
}