我正在使用MS图形Java sdk，以便从我的Java应用程序访问O365 ODFB驱动器。当我绕过企业代理服务器（连接到开放式互联网）时，便能够从API中获得所需的响应。但是当我通过代理服务器连接时，出现以下异常：
SEVERE: Throwable detail: com.microsoft.graph.core.ClientException: Error during http request
Exception in thread "main" com.microsoft.graph.core.ClientException: Error during http request
at com.microsoft.graph.http.DefaultHttpProvider.sendRequestInternal(DefaultHttpProvider.java:356)
at com.microsoft.graph.http.DefaultHttpProvider.send(DefaultHttpProvider.java:197)
at com.microsoft.graph.http.DefaultHttpProvider.send(DefaultHttpProvider.java:177)
at com.microsoft.graph.http.BaseCollectionRequest.send(BaseCollectionRequest.java:87)
at com.microsoft.graph.requests.generated.BaseDriveItemCollectionRequest.get(BaseDriveItemCollectionRequest.java:54)
at com.example.TestMain.main(TestMain.java:148)
Caused by: java.net.ConnectException: Connection timed out: connect
at java.net.DualStackPlainSocketImpl.connect0(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source)
at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source)
at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
at java.net.PlainSocketImpl.connect(Unknown Source)
at java.net.SocksSocketImpl.connect(Unknown Source)
at java.net.Socket.connect(Unknown Source)
at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source)
at sun.net.NetworkClient.doConnect(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.http.HttpClient.openServer(Unknown Source)
at sun.net.www.protocol.https.HttpsClient.<init>(Unknown …