Typescript 无法将从服务器接收的JSON对象转换为所需的类型，因此可以分析数据

这是因为您需要将employees变量初始化为空数组，因为它总是在第一次加载时运行，只有在单击按钮之后，您才能获得数组集.

employees: any = [];

这是一个模拟的堆叠闪电战，效果很好.需要注意的几点是:

1. If the 服务 is provided in root, then you need to inject the dependencies

就像这样.

private http = Inject(HttpClient);

服务

import { HttpClient } from '@angular/common/http';
import { Inject, Injectable } from '@angular/core';
import { of } from 'rxjs';

@Injectable({
  providedIn: 'root',
})
export class TestService {
  private http = Inject(HttpClient);
  constructor() {}

  getAllEmployees() {
    console.log('Inside get ALL Employees Method.');
    return of([
      {
        firstName: 'test',
        lastName: 'test',
        address: 'test',
        project: 'test',
        ssn: 'test',
        joinDate: 'test',
        status: 'test',
      },
      {
        firstName: 'test',
        lastName: 'test',
        address: 'test',
        project: 'test',
        ssn: 'test',
        joinDate: 'test',
        status: 'test',
      },
      {
        firstName: 'test',
        lastName: 'test',
        address: 'test',
        project: 'test',
        ssn: 'test',
        joinDate: 'test',
        status: 'test',
      },
      {
        firstName: 'test',
        lastName: 'test',
        address: 'test',
        project: 'test',
        ssn: 'test',
        joinDate: 'test',
        status: 'test',
      },
    ]); //this.http.get("https://localhost:9090/employee/getAllEmployees",{responseType:'text' as 'json'});
  }
}

双手

import { CommonModule } from '@angular/common';
import { HttpClientModule } from '@angular/common/http';
import { Component } from '@angular/core';
import { bootstrapApplication } from '@angular/platform-browser';
import 'zone.js';
import { AddEmployee } from './add-employee';
import { TestService } from './test.服务';

@Component({
  selector: 'app-root',
  standalone: true,
  imports: [HttpClientModule, CommonModule],
  template: `
    <p>Inside Employee Component.</p>
<button type="submit" class="btn btn-login float-center" (click)="getAllEmployees1()">getAllEmployees</button>

<div>
    <h2>Employee List</h2>
     {{ employees  | json}}
     
     <table border="1">

  <thead>
    <th *ngFor="let column of columns">
      {{column}}
    </th>
  </thead>

  <tbody>
    <tr *ngFor="let row of employees; index as i">
      <td *ngFor="let column of columns; index as j">
        {{row[column]}}
      </td>
    </tr>
  </tbody>

</table>
  </div>
  `,
})
export class App {
  columns = [
    'firstName',
    'lastName',
    'address',
    'project',
    'ssn',
    'joinDate',
    'status',
  ];
  employees: Array<AddEmployee> = [];

  constructor(private testService: TestService) {}
  ngOnInit() {}

  public getAllEmployees1() {
    this.testService.getAllEmployees().subscribe({
      next: (data) => {
        this.employees = data;
        console.log('Response: ' + this.employees);
      },
      error: (error) => {
        console.error('Error fetching employees: ', error);
      },
    });
  }
}

bootstrapApplication(App);

stackblitz个