我在一个springboot应用程序中使用了以下代码：

try {
            System.out.println("StartListener.onApplicationEvent()");
            HttpRequest request = HttpRequest.newBuilder().GET()
                    .uri(URI.create(
                            "https://fr.ftp.opendatasoft.com/openscol/fr-en-calendrier-scolaire/Zone-A-B-C-Corse.ics"))
                    .build();
            HttpClient httpClient = HttpClient.newBuilder().version(HttpClient.Version.HTTP_2).build();
            HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
            System.out.println(response.body());
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }

我每次都有一个连接异常：
java. net。Java中的ConnectException。net. http/jdk。内部的net. http. HttpClientImpl. send（HttpClientImpl.java：573）at java. net. http/jdk.内部的net. http. HttpClientFacade。send（HttpClientFacade.java：123）at fr. utensilia。covoit。后退配置StartListener。onApplicationEvent（StartListener.java：42）at java. java中的base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0（Native Method）。base/jdk.内部的反思NativeMethodAccessorImpl.在java中调用（NativeMethodAccessorImpl.java：77）。base/jdk.内部的反思DelegatingMethodAccessorImpl.在java中调用（DelegatingMethodAccessorImpl.java：43）。base/java. lang。反思方法。在org调用（Method.java：568）。SpringFramework上下文事件。ApplicationListenerMethodAdapter。org上的doInvoke（ApplicationListenerMethodAdapter.java：344）。SpringFramework上下文事件。ApplicationListenerMethodAdapter。org上的processEvent（ApplicationListenerMethodAdapter.java：229）。SpringFramework背景。事件。ApplicationListenerMethodAdapter。onApplicationEvent（ApplicationListenerMethodAdapter.java：166）at org. SpringFramework背景。事件。SimpleApplicationEventMulticaster。org上的documentkeyboard（SimpleApplicationEventMulticaster.java：176）。SpringFramework。上下文事件。SimpleApplicationEventMulticaster。在org上的invokeLog（SimpleApplicationEventMulticaster.java：169）。SpringFramework上下文事件。SimpleApplicationEventMulticaster。multicastEvent（SimpleApplicationEventMulticaster.java：143）at org. SpringFramework上下文支持。AbstractApplicationContext。在org上的AbstractApplicationContext.java：421。SpringFramework上下文支持。AbstractApplicationContext。publishEvent（AbstractApplicationContext.java：378）at org. SpringFramework上下文支持。AbstractApplicationContext。finishRefresh（AbstractApplicationContext.java：938）at org. SpringFramework上下文支持。AbstractApplicationContext.在org上刷新（AbstractApplicationContext.java：586）。SpringFramework Boot 。web. servlet。上下文ServletWebServerApplicationContext。在org上刷新（ServletWebServerApplicationContext.java：147）。SpringFramework Boot SpringApplication.在org上刷新（SpringApplication.java：734）。SpringFramework Boot 。SpringApplication。refreshContext（SpringApplication.java：408）at www.example.com java. nio.渠道。Java中的ClosedChannelException。基地/太阳nio。ch. SocketChannelImpl. java中的ensureOpen（SocketChannelImpl.java：195）。基地/太阳nio。ch. SocketChannelImpl. beginConnect（SocketChannelImpl.java：760）at java.基地/太阳nio。ch. SocketChannelImpl. connect（SocketChannelImpl.java：848）at java. net. http/jdk.internal.net.http.PlainHttpConnection.plainHttpConnection.java：183）at java. base/java.安全访问控制器。doPrivileged（AccessController.java：569）at java. net. http/jdk.内部的net. http. PlainHttpConnection。connectAsync（PlainHttpConnection.java：185）. org.springframework.boot.SpringApplication.run
如果我在一个简单的类（没有Spring）中使用相同的代码，就可以了：

import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;

public class Test {

    public static void main(String[] args) {
        try {
            System.out.println("StartListener.onApplicationEvent()");
            HttpRequest request = HttpRequest.newBuilder().GET()
                    .uri(URI.create(
                            "https://fr.ftp.opendatasoft.com/openscol/fr-en-calendrier-scolaire/Zone-A-B-C-Corse.ics"))
                    .build();
            HttpClient httpClient = HttpClient.newBuilder().version(HttpClient.Version.HTTP_2).build();
            HttpResponse<String> response = httpClient.send(request, HttpResponse.BodyHandlers.ofString());
            System.out.println(response.body());
        } catch (IOException | InterruptedException e) {
            e.printStackTrace();
        }

    }

}

我可以在浏览器中打开它，但例外情况与此不同：java.net.ConnectException while Source Validation in Java
有什么想法吗？