Access to XMLHttpRequest at 'https://...' from origin 'http://...' has been blocked by CORS policy(Spring Boot & Angular 7)

I am creating a sample application using Spring Boot and Angular 7. In spring boot I am converting http to https. In angular application the client side post functionality cannot call the server Api post method.

It throws the below error

Access to XMLHttpRequest at 'https://localhost:8082/Demo/list' from origin 'http://localhost:4200' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

Client Side Angular 7

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

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

  constructor(private http: HttpClient) { }

  firstClick() {
    return console.log('clicked');
  }
  getList() {
    return this.http.get('https://localhost:8082/Demo/list');
  }
}

Client Side

  constructor(private data: DataService) {}

  ngOnInit() {
     this.data.getList().subscribe(data => {
       this.tempList = data
       console.log(this.tempList);
     });
  }

Server

@CrossOrigin(origins = "http://localhost:4200")
@Controller

As per Spring Security you should enable localhost domain to allow access, or allow all domain to access(not secure)

https://docs.spring.io/spring-security/site/docs/4.2.x/reference/html/cors.html

@EnableWebSecurity
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http
            // by default uses a Bean by the name of corsConfigurationSource
            .cors().and()
            ...
    }

    @Bean
    CorsConfigurationSource corsConfigurationSource() {
        CorsConfiguration configuration = new CorsConfiguration();
        configuration.setAllowedOrigins(Arrays.asList("https://example.com"));
        configuration.setAllowedMethods(Arrays.asList("GET","POST"));
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        source.registerCorsConfiguration("/**", configuration);
        return source;
    }
}

Updated:

https://docs.spring.io/spring-security/site/docs/current/reference/html5/#cors