java - “java.net.ConnectException：null”在一些更改后没有明显的原因

public class TermineApiClient { public static final String TOKEN_URI = "https://testapi.de/oauth/v2/token"; public static final String API_URL = "https://testapi.de/clients/2/events?startDate=2021-04-30"; public static final String CLIENT_ID = "5544zj80ghcs0o8g"; public static final String CLIENT_SECRET = "5pp5dn48k9s"; public static final String GRANT_TYPE = "client_credentials";

public static String getToken() throws IOException, InterruptedException { HttpClient client = HttpClient.newHttpClient(); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create(TOKEN_URI)) .header("Content-Type", "application/x-www-form-urlencoded") .header("Accept", "application/json") .POST(HttpRequest.BodyPublishers.ofString("client_id=" + CLIENT_ID + "&client_secret=" + CLIENT_SECRET + "&grant_type=" + GRANT_TYPE)) .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); //bind response to Authentication object ObjectMapper mapper = new ObjectMapper(); return mapper.readValue(response.body(), Authentication.class).getAccess_token(); }

@Component public class TermineApiClient { public static String TOKEN_URI; public static String API_URL; public static String CLIENT_ID; public static String CLIENT_SECRET; public static String GRANT_TYPE; @Value("${security.oauth2.client.accessTokenUri}") public void setTokenUri(String accessTokenUri){ TermineApiClient.TOKEN_URI = accessTokenUri; } @Value("${application.termineRegional.baseUrl}") public void setApiUrl(String apiUrl){ TermineApiClient.API_URL = apiUrl; } @Value("${security.oauth2.client.clientId}") public void setClientId(String clientId){ TermineApiClient.CLIENT_ID = clientId; } @Value("${security.oauth2.client.clientSecret}") public void setClientSecret(String clientSecret){ TermineApiClient.CLIENT_SECRET = clientSecret; } @Value("${security.oauth2.client.grantType}") public void setGrantType(String grantType){ TermineApiClient.GRANT_TYPE = grantType; }

java.net.ConnectException: null at java.net.http/jdk.internal.net.http.HttpClientImpl.send(HttpClientImpl.java:571) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.HttpClientFacade.send(HttpClientFacade.java:123) ~[java.net.http:na] at com.events.termineapi.Client.TermineApiClient.getToken(TermineApiClient.java:69) ~[classes/:na] at com.events.termineapi.Client.TermineApiClient.getEvents(TermineApiClient.java:49) ~[classes/:na] at com.events.termineapi.Controller.EventsController.getEvents(EventsController.java:17) ~[classes/:na] at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104) ~[na:na] at java.base/java.lang.reflect.Method.invoke(Method.java:577) ~[na:na] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.19.jar:5.3.19] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.19.jar:5.3.19] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.19.jar:5.3.19] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.19.jar:5.3.19] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.19.jar:5.3.19] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.19.jar:5.3.19] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.19.jar:5.3.19] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.19.jar:5.3.19] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.19.jar:5.3.19] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.19.jar:5.3.19] at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.62.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.19.jar:5.3.19] at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.62.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.62.jar:9.0.62] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.19.jar:5.3.19] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.19.jar:5.3.19] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.19.jar:5.3.19] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.19.jar:5.3.19] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.19.jar:5.3.19] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.19.jar:5.3.19] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:360) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:399) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:890) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1743) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.62.jar:9.0.62] at java.base/java.lang.Thread.run(Thread.java:833) ~[na:na] Caused by: java.net.ConnectException: null at java.net.http/jdk.internal.net.http.common.Utils.toConnectException(Utils.java:1045) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.PlainHttpConnection.connectAsync(PlainHttpConnection.java:198) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.AsyncSSLConnection.connectAsync(AsyncSSLConnection.java:56) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.Http2Connection.createAsync(Http2Connection.java:378) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.Http2ClientImpl.getConnectionFor(Http2ClientImpl.java:128) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.ExchangeImpl.get(ExchangeImpl.java:93) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.Exchange.establishExchange(Exchange.java:343) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.Exchange.responseAsyncImpl0(Exchange.java:475) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.Exchange.responseAsyncImpl(Exchange.java:380) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.Exchange.responseAsync(Exchange.java:372) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:408) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.MultiExchange.lambda$responseAsyncImpl$7(MultiExchange.java:449) ~[java.net.http:na] at java.base/java.util.concurrent.CompletableFuture.uniHandle(CompletableFuture.java:934) ~[na:na] at java.base/java.util.concurrent.CompletableFuture.uniHandleStage(CompletableFuture.java:950) ~[na:na] at java.base/java.util.concurrent.CompletableFuture.handle(CompletableFuture.java:2340) ~[na:na] at java.net.http/jdk.internal.net.http.MultiExchange.responseAsyncImpl(MultiExchange.java:439) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.MultiExchange.lambda$responseAsync0$2(MultiExchange.java:341) ~[java.net.http:na] at java.base/java.util.concurrent.CompletableFuture$UniCompose.tryFire(CompletableFuture.java:1150) ~[na:na] at java.base/java.util.concurrent.CompletableFuture.postComplete(CompletableFuture.java:510) ~[na:na] at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1773) ~[na:na] at java.net.http/jdk.internal.net.http.HttpClientImpl$DelegatingExecutor.execute(HttpClientImpl.java:155) ~[java.net.http:na] at java.base/java.util.concurrent.CompletableFuture.completeAsync(CompletableFuture.java:2673) ~[na:na] at java.net.http/jdk.internal.net.http.MultiExchange.responseAsync(MultiExchange.java:294) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.HttpClientImpl.sendAsync(HttpClientImpl.java:652) ~[java.net.http:na] at java.net.http/jdk.internal.net.http.HttpClientImpl.send(HttpClientImpl.java:550) ~[java.net.http:na] ... 52 common frames omitted Caused by: java.nio.channels.UnresolvedAddressException: null at java.base/sun.nio.ch.Net.checkAddress(Net.java:149) ~[na:na] at java.base/sun.nio.ch.Net.checkAddress(Net.java:157) ~[na:na] at java.base/sun.nio.ch.SocketChannelImpl.checkRemote(SocketChannelImpl.java:816) ~[na:na] at java.base/sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:839) ~[na:na] at java.net.http/jdk.internal.net.http.PlainHttpConnection.lambda$connectAsync$0(PlainHttpConnection.java:183) ~[java.net.http:na] at java.base/java.security.AccessController.doPrivileged(AccessController.java:569) ~[na:na] at java.net.http/jdk.internal.net.http.PlainHttpConnection.connectAsync(PlainHttpConnection.java:185) ~[java.net.http:na] ... 75 common frames omitted

application: termineRegional: baseUrl: https://testapi.de/clients/2/events?startDate=2021-04-30 security: oauth2: client: grantType: client_credentials clientId: 5544zj80ghcs0 clientSecret: 5pp5dn48 accessTokenUri: https://testapi.de/oauth/v2/token spring: autoconfigure: exclude[0]: org.springframework.boot.autoconfigure.security.servlet.SecurityAutoConfiguration exclude[1]: org.springframework.boot.actuate.autoconfigure.security.servlet.ManagementWebSecurityAutoConfiguration

@Value("${security.oauth2.client.accessTokenUri}") private String TOKEN_URI; @Value("${application.termineRegional.baseUrl}") private String API_URL; @Value("${security.oauth2.client.clientId}") private String CLIENT_ID; @Value("${security.oauth2.client.clientSecret}") private String CLIENT_SECRET; @Value("${security.oauth2.client.grantType}") private String GRANT_TYPE; public List<Event> getEvents() throws IOException, InterruptedException { String token = getToken(); HttpClient client = HttpClient.newHttpClient(); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create(API_URL)) .header("Authorization", "Bearer " + token) .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); ObjectMapper mapper = new ObjectMapper() .configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false); return mapper.readValue(response.body(), mapper.getTypeFactory().constructCollectionType(List.class, Event.class)); } public String getToken() throws IOException, InterruptedException { HttpClient client = HttpClient.newHttpClient(); HttpRequest request = HttpRequest.newBuilder() .uri(URI.create(TOKEN_URI)) .header("Content-Type", "application/x-www-form-urlencoded") .header("Accept", "application/json") .POST(HttpRequest.BodyPublishers.ofString("client_id=" + CLIENT_ID + "&client_secret=" + CLIENT_SECRET + "&grant_type=" + GRANT_TYPE)) .build(); HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString()); //bind response to Authentication object ObjectMapper mapper = new ObjectMapper(); return mapper.readValue(response.body(), Authentication.class).getAccess_token(); }