“没有内容映射到对象，由于输入的结束”调用REST WS时

Question

请看下面的方法：

@POST
@Path("/device")
@Consumes("application/json")
@Produces("application/json")
public String putDevice(String jsonObject, @Context HttpHeaders headers, Admin admin)
{
    ObjectMapper mapper = new ObjectMapper();

    try
    {
        return updateDevice(mapper.readTree(jsonObject), Utils.extractUserInfo(headers), admin.getServer(), admin.getPort());
    }
    catch (JsonProcessingException e)
    {
        return e.getMessage();
    }
    catch (IOException e)
    {
        return e.getMessage();
    }
}

当我打电话从邮差的WS，我得到以下异常：

08-FEB-2019 14：23：44.138 GRAVE [HTTP-NIO-8080-EXEC-7] com.sun.jersey.spi.container.ContainerResponse.mapMappableContainerException所含内MappableContainerException异常不能被映射到的响应，重新投掷到HTTP容器java.io.EOFException的：没有内容映射到对象由于在org.codehaus.jackson.map在org.codehaus.jackson.map.ObjectMapper._initForReading（ObjectMapper.java:2766）输入端。 ObjectMapper._readValue（ObjectMapper.java:2682）在org.codehaus.jackson.map.ObjectMapper.readValue（ObjectMapper.java:1308）在org.codehaus.jackson.jaxrs.JacksonJsonProvider.readFrom（JacksonJsonProvider.java:419）在COM .sun.jersey.json.impl.provider.entity.JacksonProviderProxy.readFrom（JacksonProviderProxy.java:139）在com.sun.jersey.spi.container.ContainerRequest.getEntity（ContainerRequest.java:490）在com.sun.jersey .server.impl.model.method.dispatch.EntityParamDispatchProvider $ EntityInjectable.getValue（EntityParamDispatchProvider.java:123）在com.sun.jerse y.server.impl.inject.InjectableValuesProvider.getInjectableValues（InjectableValuesProvider.java:86）在com.sun.jersey.server.impl.model.method.dispatch.Abs​​tractResourceMethodDispatchProvider $ EntityParamInInvoker.getParams（AbstractResourceMethodDispatchProvider.java:153）在COM。 sun.jersey.server.impl.model.method.dispatch.Abs​​tractResourceMethodDispatchProvider $ TypeOutInvoker._dispatch（AbstractResourceMethodDispatchProvider.java:183）在com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch（ResourceJavaMethodDispatcher.java ：75）在com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept（HttpMethodRule.java:302）在com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept（RightHandPathRule.java ：147）在com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept（ResourceClassRule.java:108）在com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept（RightHandPathRule.java ：147）在com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept （RootResourceClassesRule.java:84）在com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest（WebApplicationImpl.java:1542）在com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest（WebApplicationImpl.java ：1473）在com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest（WebApplicationImpl.java:1419）在com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest（WebApplicationImpl.java:1409）在com.sun.jersey.spi.container.servlet.WebComponent.service（WebComponent.java:409）在com.sun.jersey.spi.container.servlet.ServletContainer.service（ServletContainer.java:558）在的com.sun。 jersey.spi.container.servlet.ServletContainer.service（ServletContainer.java:733）在javax.servlet.http.HttpServlet.service（HttpServlet.java:742）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain。的java：231）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain.java:166）在org.apache.tomc at.websocket.server.WsFilter.doFilter（WsFilter.java:52）在org.apache.catalina.core.ApplicationFilterChain.internalDoFilter（ApplicationFilterChain.java:193）在org.apache.catalina.core.ApplicationFilterChain.doFilter（ApplicationFilterChain。的java：166）在org.apache.catalina.core.StandardWrapperValve.invoke（StandardWrapperValve.java:198）在org.apache.catalina.core.StandardContextValve.invoke（StandardContextValve.java:96）在org.apache.catalina.authenticator .AuthenticatorBase.invoke（AuthenticatorBase.java:496）在org.apache.catalina.core.StandardHostValve.invoke（StandardHostValve.java:140）在org.apache.catalina.valves.ErrorReportValve.invoke（ErrorReportValve.java:81）在org.apache.catalina.valves.AbstractAccessLogValve.invoke（AbstractAccessLogValve.java:650）在org.apache.catalina.core.StandardEngineValve.invoke（StandardEngineValve.java:87）在org.apache.catalina.connector.CoyoteAdapter.service（ CoyoteAdapter.java:342）在org.apache.coyote.http11.Http11Processor.service（Http11Processor.ja VA：803）在org.apache.coyote.AbstractProcessorLight.process（AbstractProcessorLight.java:66）在org.apache.coyote.AbstractProtocol $ ConnectionHandler.process（AbstractProtocol.java:790）在org.apache.tomcat.util.net .NioEndpoint $ SocketProcessor.doRun（NioEndpoint.java:1468）在org.apache.tomcat.util.net.SocketProcessorBase.run（SocketProcessorBase.java:49）在java.util.concurrent.ThreadPoolExecutor.runWorker（ThreadPoolExecutor.java:1149 ）在java.util.concurrent.ThreadPoolExecutor中$ Worker.run（ThreadPoolExecutor.java:624）在org.apache.tomcat.util.threads.TaskThread $ WrappingRunnable.run（TaskThread.java:61）在java.lang.Thread中。运行（Thread.java:748）

需要提及的是，当我删除了参数jsonObject和编辑这样的方法异常消失的可能很重要：

@POST
@Path("/device")
@Consumes("application/json")
@Produces("application/json")
public Response putDevice(@Context HttpHeaders headers, Admin admin)
{
    String output = admin.toString();
    return Response.status(200).entity(output).build();
}

任何建议将不胜感激。

Answer 1

由于发表阿尔诺的联系，我了解到，你只能有没有标注一个参数，以及一个将被处理为请求主体。所以我做了必要的修改，并且这里的方法现在的样子：

@POST
@Path("/device")
@Consumes("application/json")
@Produces("application/json")
public String putDevice(String jsonString, @Context HttpHeaders headers)
{
    ObjectMapper mapper = new ObjectMapper();
    try
    {
    JSONObject jsonObject = new JSONObject(jsonString);
    return updateDevice(mapper.readTree(jsonString),
                        Utils.extractUserInfo(headers),
                        jsonObject.getString("server"),
                        jsonObject.getInt("port"));
}
    catch (JSONException e)
    {
        return e.getMessage();
    }
    catch (JsonProcessingException e)
    {
        return e.getMessage();
    }
    catch (IOException e)
    {
        return e.getMessage();
    }
}

我希望这会帮助别人同样的问题一天。