[英]Returning a list of javax.ws.rs.core.Response resulting in 500
我試圖從我的休息終點返回一個ArrayList of Response對象。
為此,我將結果集包裝在通用實體對象中
try {
GenericEntity<List<Response>> response = new GenericEntity<List<Response>>(responses) {
};
return Response.ok(response).build();
} catch (Exception e) {
e.printStackTrace();
}
無論我嘗試什么,我都會得到500的回扣,這令人沮喪。 有什么辦法可以使我得到更明確的答案,為什么會失敗呢? 我的方法使用的注釋如下:
@POST
@Path("restendpoint")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
謝謝
編輯
添加自定義異常映射器后,我可以看到錯誤是因為
javax.ws.rs.WebApplicationException: HTTP 500 Internal Server Error
at org.eclipse.persistence.jaxb.rs.MOXyJsonProvider.writeTo(MOXyJsonProvider.java:951)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.invokeWriteTo(WriterInterceptorExecutor.java:265)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor$TerminalWriterInterceptor.aroundWriteTo(WriterInterceptorExecutor.java:250)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
at org.glassfish.jersey.server.internal.JsonWithPaddingInterceptor.aroundWriteTo(JsonWithPaddingInterceptor.java:106)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
at org.glassfish.jersey.server.internal.MappableExceptionWrapperInterceptor.aroundWriteTo(MappableExceptionWrapperInterceptor.java:86)
at org.glassfish.jersey.message.internal.WriterInterceptorExecutor.proceed(WriterInterceptorExecutor.java:162)
at org.glassfish.jersey.message.internal.MessageBodyFactory.writeTo(MessageBodyFactory.java:1130)
at org.glassfish.jersey.server.ServerRuntime$Responder.writeResponse(ServerRuntime.java:711)
at org.glassfish.jersey.server.ServerRuntime$Responder.processResponse(ServerRuntime.java:444)
at org.glassfish.jersey.server.ServerRuntime$Responder.process(ServerRuntime.java:434)
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:329)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:769)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1125)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1059)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:110)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
at org.eclipse.jetty.server.Server.handle(Server.java:497)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:248)
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:610)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:539)
at java.lang.Thread.run(Thread.java:744)
Caused by: javax.xml.bind.MarshalException
- with linked exception:
[Exception [EclipseLink-25007] (Eclipse Persistence Services - 2.6.0.v20150309-bf26070): org.eclipse.persistence.exceptions.XMLMarshalException
Exception Description: A descriptor for class org.glassfish.jersey.message.internal.OutboundJaxrsResponse was not found in the project. For JAXB, if the JAXBContext was bootstrapped using TypeMappingInfo[] you must call a marshal method that accepts TypeMappingInfo as an input parameter.]
at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:487)
at org.eclipse.persistence.jaxb.rs.MOXyJsonProvider.writeTo(MOXyJsonProvider.java:949)
... 40 more
Caused by: Exception [EclipseLink-25007] (Eclipse Persistence Services - 2.6.0.v20150309-bf26070): org.eclipse.persistence.exceptions.XMLMarshalException
Exception Description: A descriptor for class org.glassfish.jersey.message.internal.OutboundJaxrsResponse was not found in the project. For JAXB, if the JAXBContext was bootstrapped using TypeMappingInfo[] you must call a marshal method that accepts TypeMappingInfo as an input parameter.
at org.eclipse.persistence.exceptions.XMLMarshalException.descriptorNotFoundInProject(XMLMarshalException.java:154)
at org.eclipse.persistence.internal.oxm.Context$ContextState.getSession(Context.java:137)
at org.eclipse.persistence.oxm.XMLContext$XMLContextState.getSession(XMLContext.java:798)
at org.eclipse.persistence.oxm.XMLContext$XMLContextState.getSession(XMLContext.java:1)
at org.eclipse.persistence.internal.oxm.Context.getSession(Context.java:458)
at org.eclipse.persistence.oxm.XMLContext.getSession(XMLContext.java:366)
at org.eclipse.persistence.oxm.XMLContext.getSession(XMLContext.java:1)
at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:582)
at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshalStreamOrWriter(XMLMarshaller.java:1126)
at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:934)
at org.eclipse.persistence.internal.oxm.XMLMarshaller.marshal(XMLMarshaller.java:877)
at org.eclipse.persistence.jaxb.JAXBMarshaller.marshal(JAXBMarshaller.java:483)
... 41 more
如@simdevmon所述, javax.ws.rs.core.Response
不能滿足您的目的,因為一旦調用build()
方法,它將創建一個外發響應( OutboundJaxrsResponse ),Jersey使用該響應來發送給客戶端。
這意味着默認情況下,當通過服務器發送響應時,Jersey將不了解如何封送/取消封送其屬性。
如果只需要將響應對象列表作為JSON結果,則另一個合適的解決方案是為列表創建包裝器類(沒有最終字段或構造函數):
import javax.ws.rs.core.Response;
public class MyResponse {
private List<Response> responses;
public List<Response> getResponses() {
return responses;
}
public void setResponses(List<Response> responses) {
this.responses = responses;
}
}
而您的rest調用則改為處理此對象:
try {
List<Response> responses = new ArrayList<>();
responses.add(Response.ok().build());
responses.add(Response.notModified().build());
responses.add(Response.noContent().build());
MyResponse myResponse = new MyResponse();
myResponse.setResponses(responses);
return Response.ok(new GenericEntity<MyResponse>(myResponse) {}).build();
} catch (Exception e) {
e.printStackTrace();
}
這將生成以下JSON輸出:
{
"responses": [
"OutboundJaxrsResponse{status=200, reason=OK, hasEntity=false, closed=false, buffered=false}",
"OutboundJaxrsResponse{status=304, reason=Not Modified, hasEntity=false, closed=false, buffered=false}",
"OutboundJaxrsResponse{status=204, reason=No Content, hasEntity=false, closed=false, buffered=false}"
]
}
您還可以執行以下操作(請注意jersey-media-json-jackson
的依賴項),該添加項是為了使List返回工作而額外添加的
代碼:
@GET
@Path("getListRes")
@Produces("application/json")
public Response getListResponse() {
List<Response> responses = new ArrayList<>();
responses.add(Response.ok().build());
responses.add(Response.notModified().build());
responses.add(Response.noContent().build());
GenericEntity<List> list = new GenericEntity<List> (responses) {};
return Response.status(200).entity(list).build();
}
Pom.xml依賴項
<!-- Jersey 2.19 -->
<dependency>
<groupId>org.glassfish.jersey.containers</groupId>
<artifactId>jersey-container-servlet</artifactId>
<version>${jersey2.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-server</artifactId>
<version>${jersey2.version}</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.core</groupId>
<artifactId>jersey-client</artifactId>
<version>${jersey2.version}</version>
</dependency>
<dependency>
<groupId>com.google.code.gson</groupId>
<artifactId>gson</artifactId>
<version>2.2.4</version>
</dependency>
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-jackson</artifactId>
<version>2.24.1</version>
</dependency>
輸出在: http : //jerseyexample-ravikant.rhcloud.com/rest/jws/getListRes
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.