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在Apache Tomcat 8.5上使用Spring 4.3.1，我們實現了一個處理GET，POST & PUT請求的REST服務器。 POST請求中的形式進行處理：對於RestTemplate客戶端，在Spring中拋出ResourceAccessException與HttpClientErrorException
@POST
@Consumes({MediaType.APPLICATION_XML, MediaType.APPLICATION_JSON})
@Transactional
public Response postMethod(final MyDomain object) {
domainHandler.createDomain(object);
return Response.status(201).entity(object).build();
}
在處理在服務器側POST請求時，WebApplicationException被拋出，其通過處理：
@Provider
public class WebExceptionMapper implements ExceptionMapper<WebApplicationException> {
@Override
public Response toResponse(WebApplicationException exception) {
int httpStatus = exception.getResponse().getStatus();
ErrorMessage em = new WebErrorMessage(exception.getMessage());
return Response.status(httpStatus).entity(em).build();
}
}
在客戶端：
response = rest.exchange(requestURL, method, requestEntity, MyDomain.class);
的ResourceAccessException拋出：
2017-07-25 15:46:41,489 ERROR [com.my.code.web.presentation.ManagementController:63] (http-nio-8080-exec-7#34): Internal exception occured with cause:
org.springframework.web.client.ResourceAccessException: I/O error on POST request for "http://localhost:8080/": Server returned HTTP response code: 500 for URL: http://localhost:8080/; nested exception is java.io.IOException: Server returned HTTP response code: 500 for URL: http://localhost:8080/
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:633) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.client.RestTemplate.execute(RestTemplate.java:580) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.client.RestTemplate.exchange(RestTemplate.java:498) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at com.my.code.web.integration.client.rest.FeedbackRestClient.callForApiCreateFeedback(FeedbackRestClient.java:218) ~[classes/:?]
at com.my.code.web.integration.client.rest.FeedbackRestClient.pushFeedbackData(FeedbackRestClient.java:70) ~[classes/:?]
at com.my.code.web.presentation.FeedbackController.feedback(FeedbackController.java:91) ~[classes/:?]
at sun.reflect.GeneratedMethodAccessor72.invoke(Unknown Source) ~[?:?]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_131]
at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_131]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:221) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:136) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:114) ~[spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:827) ~[spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:738) ~[spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:85) ~[spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963) [spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897) [spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970) [spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861) [spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) [servlet-api.jar:?]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846) [spring-webmvc-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) [servlet-api.jar:?]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) [catalina.jar:8.5.16]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.16]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197) [spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) [spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.16]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.16]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-websocket.jar:8.5.16]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) [catalina.jar:8.5.16]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) [catalina.jar:8.5.16]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) [catalina.jar:8.5.16]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [catalina.jar:8.5.16]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) [catalina.jar:8.5.16]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) [catalina.jar:8.5.16]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) [catalina.jar:8.5.16]
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) [catalina.jar:8.5.16]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) [catalina.jar:8.5.16]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) [catalina.jar:8.5.16]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) [tomcat-coyote.jar:8.5.16]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) [tomcat-coyote.jar:8.5.16]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-coyote.jar:8.5.16]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) [tomcat-coyote.jar:8.5.16]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-coyote.jar:8.5.16]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_131]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_131]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-util.jar:8.5.16]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_131]
Caused by: java.io.IOException: Server returned HTTP response code: 400 for URL: http://localhost:8080/
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1876) ~[?:1.8.0_131]
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1474) ~[?:1.8.0_131]
at org.springframework.http.client.SimpleClientHttpResponse.getBody(SimpleClientHttpResponse.java:85) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at com.my.code.web.integration.client.rest.BufferingClientHttpResponseWrapper.getBody(BufferingClientHttpResponseWrapper.java:46) ~[classes/:?]
at com.my.code.web.integration.client.rest.LoggingRequestInterceptor.traceResponse(LoggingRequestInterceptor.java:66) ~[classes/:?]
at com.my.code.web.integration.client.rest.LoggingRequestInterceptor.intercept(LoggingRequestInterceptor.java:34) ~[classes/:?]
at org.springframework.http.client.InterceptingClientHttpRequest$InterceptingRequestExecution.execute(InterceptingClientHttpRequest.java:85) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.http.client.InterceptingClientHttpRequest.executeInternal(InterceptingClientHttpRequest.java:69) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.http.client.AbstractBufferingClientHttpRequest.executeInternal(AbstractBufferingClientHttpRequest.java:48) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.http.client.AbstractClientHttpRequest.execute(AbstractClientHttpRequest.java:53) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
at org.springframework.web.client.RestTemplate.doExecute(RestTemplate.java:619) ~[spring-web-4.3.1.RELEASE.jar:4.3.1.RELEASE]
... 47 more
問：
爲什麼異常org.springframework.web.client.ResourceAccessException被拋出，但不是org.springframework.web.client.HttpClientErrorException，發生什麼事了，當WebApplicationException發生處理GET請求？
的ResourceAccessException異常不會有讓我讀HTTP狀態的方法，例如getRawStatusCode()，getResponseHeaders()等
您發佈的所有異常跟蹤都是客戶端。 API正在拋出500，其餘的異常映射發生在客戶端上下文中。你能否請嘗試在服務器端添加一些額外的日誌記錄 - WebExceptionMapper來驗證代碼塊是否正在執行？ –
你的stacktrace有些東西真的很奇怪：「內部異常發生原因：[...]服務器返回的HTTP響應代碼：500 for URL」，但是「IOException：服務器返回的HTTP響應代碼：400 。]「的原因。它真的是你的堆棧跟蹤還是你做了錯誤的複製/粘貼？ –
您的excange網址是「http：// localhost：8080 /」，並且在您的@POST請求接受方法中沒有定義這是默認請求接受方，如@RequestMapping（value =「/」，method = RequestMethod.POST） –