泽西岛：用冒号解析 json 键

【问题标题】：Jersey: parsing json key with colon泽西岛：用冒号解析 json 键
【发布时间】：2014-09-28 08:42:34
【问题描述】：

例如我想解析以下Json：

{
    "servers": [
        {
            "status": "SHUTOFF",
            "updated": "2014-08-05T06:42:19Z",
            "hostId": "038d4d27e44754af0a4d163ab981e33930bf1a66450fa260d5459b8d",
            "OS-EXT-SRV-ATTR:host": "dev-desktop"
        }
    ]
}

我曾经这样做的课程应该是：

public class Server 
{
   private String status;
   private String updated;
   private String hostId;

   @XmlElement(name = "OS-EXT-SRV-ATTR:host")
   private String OS_EXT_SRV_ATTR_host; 
}

这是我尝试将 json 转换为类时 Glassfish 服务器的日志：

Grave:   javax.ws.rs.WebApplicationException: HTTP 500 Internal Server Error
    at org.eclipse.persistence.jaxb.rs.MOXyJsonProvider.readFrom(MOXyJsonProvider.java:644)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor$TerminalReaderInterceptor.aroundReadFrom(ReaderInterceptorExecutor.java:188)
    at org.glassfish.jersey.message.internal.ReaderInterceptorExecutor.proceed(ReaderInterceptorExecutor.java:134)
    at org.glassfish.jersey.message.internal.MessageBodyFactory.readFrom(MessageBodyFactory.java:988)
    at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:833)
    at org.glassfish.jersey.message.internal.InboundMessageContext.readEntity(InboundMessageContext.java:768)
    at org.glassfish.jersey.client.InboundJaxrsResponse.readEntity(InboundJaxrsResponse.java:96)
    at org.glassfish.jersey.client.ScopedJaxrsResponse.access$001(ScopedJaxrsResponse.java:56)
    at org.glassfish.jersey.client.ScopedJaxrsResponse$1.call(ScopedJaxrsResponse.java:77)
    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:228)
    at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:396)
    at org.glassfish.jersey.client.ScopedJaxrsResponse.readEntity(ScopedJaxrsResponse.java:74)
    at controller.project.control.ProjectEngine.getServersDetails(ProjectEngine.java:62)
    at controller.ProxyRestApi.getServersDetails(ProxyRestApi.java:122)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.glassfish.ejb.security.application.EJBSecurityManager.runMethod(EJBSecurityManager.java:1081)
    at org.glassfish.ejb.security.application.EJBSecurityManager.invoke(EJBSecurityManager.java:1153)
    at com.sun.ejb.containers.BaseContainer.invokeBeanMethod(BaseContainer.java:4695)
    at com.sun.ejb.EjbInvocation.invokeBeanMethod(EjbInvocation.java:630)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582)
    at org.jboss.weld.ejb.AbstractEJBRequestScopeActivationInterceptor.aroundInvoke(AbstractEJBRequestScopeActivationInterceptor.java:46)
    at sun.reflect.GeneratedMethodAccessor97.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.EjbInvocation.proceed(EjbInvocation.java:582)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.doCall(SystemInterceptorProxy.java:163)
    at com.sun.ejb.containers.interceptors.SystemInterceptorProxy.aroundInvoke(SystemInterceptorProxy.java:140)
    at sun.reflect.GeneratedMethodAccessor104.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at com.sun.ejb.containers.interceptors.AroundInvokeInterceptor.intercept(InterceptorManager.java:883)
    at com.sun.ejb.containers.interceptors.AroundInvokeChainImpl.invokeNext(InterceptorManager.java:822)
    at com.sun.ejb.containers.interceptors.InterceptorManager.intercept(InterceptorManager.java:369)
    at com.sun.ejb.containers.BaseContainer.__intercept(BaseContainer.java:4667)
    at com.sun.ejb.containers.BaseContainer.intercept(BaseContainer.java:4655)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandler.invoke(EJBLocalObjectInvocationHandler.java:212)
    at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
    at com.sun.proxy.$Proxy344.getServersDetails(Unknown Source)
    at controller.__EJB31_Generated__ProxyRestApi__Intf____Bean__.getServersDetails(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:125)
    at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:152)
    at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:91)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:346)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:341)
    at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:101)
    at org.glassfish.jersey.server.ServerRuntime$1.run(ServerRuntime.java:224)
    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:198)
    at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:946)
    at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:323)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:372)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:335)
    at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:218)
    at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
    at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
    at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
    at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:357)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:260)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:188)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:191)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:168)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:189)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:288)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:206)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:136)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:114)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:838)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrate
Grave:   gy.java:113)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:115)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:55)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:135)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:564)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:544)
    at java.lang.Thread.run(Thread.java:744)
Caused by: javax.xml.bind.JAXBException: 
Descriptor Exceptions: 
---------------------------------------------------------
Runtime Exceptions: 
---------------------------------------------------------
Exception [EclipseLink-25016] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.XMLMarshalException
Exception Description: A namespace for the prefix OS-EXT-SRV-ATTR:host was not found in the namespace resolver.
 - with linked exception:
[Exception [EclipseLink-0] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions: 
---------------------------------------------------------
Runtime Exceptions: 
---------------------------------------------------------
Exception [EclipseLink-25016] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.XMLMarshalException
Exception Description: A namespace for the prefix OS-EXT-SRV-ATTR:host was not found in the namespace resolver.
]
    at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:1021)
    at org.eclipse.persistence.jaxb.JAXBContext.<init>(JAXBContext.java:174)
    at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:165)
    at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:152)
    at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:112)
    at org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(JAXBContextFactory.java:102)
    at org.eclipse.persistence.jaxb.rs.MOXyJsonProvider.getJAXBContext(MOXyJsonProvider.java:302)
    at org.eclipse.persistence.jaxb.rs.MOXyJsonProvider.readFrom(MOXyJsonProvider.java:557)
    ... 97 more
Caused by: Exception [EclipseLink-0] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.IntegrityException
Descriptor Exceptions: 
---------------------------------------------------------
Runtime Exceptions: 
---------------------------------------------------------
Exception [EclipseLink-25016] (Eclipse Persistence Services - 2.5.0.v20130507-3faac2b): org.eclipse.persistence.exceptions.XMLMarshalException
Exception Description: A namespace for the prefix OS-EXT-SRV-ATTR:host was not found in the namespace resolver.
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:689)
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:625)
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.initializeDescriptors(DatabaseSessionImpl.java:565)
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.postConnectDatasource(DatabaseSessionImpl.java:792)
    at org.eclipse.persistence.internal.sessions.DatabaseSessionImpl.login(DatabaseSessionImpl.java:749)
    at org.eclipse.persistence.oxm.XMLContext$XMLContextState.setupSession(XMLContext.java:738)
    at org.eclipse.persistence.oxm.XMLContext$XMLContextState.setupSession(XMLContext.java:1)
    at org.eclipse.persistence.internal.oxm.Context$ContextState.<init>(Context.java:86)
    at org.eclipse.persistence.oxm.XMLContext$XMLContextState.<init>(XMLContext.java:702)
    at org.eclipse.persistence.oxm.XMLContext.<init>(XMLContext.java:192)
    at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:1046)
    at org.eclipse.persistence.jaxb.JAXBContext$TypeMappingInfoInput.createContextState(JAXBContext.java:1018)
    ... 104 more

是否有任何转义字符以防止Json键中冒号的问题？这是第一个想到的想法，但肯定还有其他更好的方法来解决这个问题。 感谢您的帮助！

【问题讨论】：

    标签： java json jersey moxy


    【解决方案1】：

    尝试更改命名空间分隔符：

    jsonMarshaller.setProperty(MarshallerProperties.JSON_NAMESPACE_SEPARATOR, '.');
jsonUnmarshaller.setProperty(UnmarshallerProperties.JSON_NAMESPACE_SEPARATOR, '.');

    我使用了.，但您必须选择正确的字符。

    此外，您的 json servers 元素是一个数组，但您的目标是一个简单对象。只是指出来......

    为了将这些功能直接设置到客户端：

    final MoxyJsonConfig moxyJsonConfig = MoxyJsonConfig()
        .setNamespacePrefixMapper(namespacePrefixMapper)
        .setNamespaceSeparator(':');

final Client client = ClientBuilder.newBuilder()
    // The line below that registers MOXy feature can be
    // omitted if FEATURE_AUTO_DISCOVERY_DISABLE is
    // not disabled.
    .register(MoxyJsonFeature.class)
    .register(jsonConfigResolver)
    .build();

    【讨论】：

    【解决方案2】：

    我在从 Akamai https://jsapi.apiary.io/apis/akamaiopen2lunapapiproduction/reference/edge-hostnames.html 返回的 json 有效负载中遇到了同样的问题，其中密钥包含冒号。

    根据上面来自 Baldy 和 javadoc https://jersey.java.net/documentation/latest/media.html#json.moxy 的答案，经过反复试验，我终于让它工作了

    您的代码需要类似于 ...

    import javax.ws.rs.client.Client;
import javax.ws.rs.client.ClientBuilder;
import javax.ws.rs.client.Entity;
import javax.ws.rs.client.Invocation;
import javax.ws.rs.client.WebTarget;

import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;

import org.glassfish.jersey.moxy.json.MoxyJsonConfig;
import org.glassfish.jersey.moxy.json.MoxyJsonFeature;

    ...

    ClientBuilder builder = ClientBuilder.newBuilder();

boolean initDefaultProperties = true;
MoxyJsonConfig moxyJsonConfig = new MoxyJsonConfig(initDefaultProperties);
moxyJsonConfig.setNamespaceSeparator(':');

Map<String, String> namespacePrefixMapper = new HashMap<String, String>();
namespacePrefixMapper.put("OS-EXT-SRV-ATTR", "OS-EXT-SRV-ATTR");
moxyJsonConfig.setNamespacePrefixMapper(namespacePrefixMapper);

builder.register(MoxyJsonFeature.class);
builder.register(moxyJsonConfig.resolver());

Client client = builder.build();

WebTarget target = client.target("https://www.xxxxxxx.com/restApi/v0");

WebTarget resourceWebTarget = target.path("serverStatus").queryParam("status","SHUTOFF");

Invocation.Builder invocationBuilder = resourceWebTarget.request(MediaType.APPLICATION_JSON_TYPE);

// GET ...
Response response = invocationBuilder.get();
System.out.println(response.getStatus());
System.out.println(response.getHeaders());

if (response.getStatus() == 200)
{
  ServerStatusResponse statusResponse = response.readEntity(ServerStatusResponse.class);
  for (Server s : statusResponse.getServers()) {
    System.out.println(s.getOSEXTSRVATTRHost());
  }
}

    然后假设 pojos 如下所示 .. 检查 OSEXTSRVATTRHost 设置器上使用的注释 ...

    public class Server {

  private String status;
  private String updated;
  private String hostId;
  private String OSEXTSRVATTRHost;

  public String getStatus() {
    return status;
  }

  public void setStatus(String status) {
    this.status = status;
  }

  public String getUpdated() {
    return updated;
  }

  public void setUpdated(String updated) {
    this.updated = updated;
  }

  public String getHostId() {
    return hostId;
  }

  public void setHostId(String hostId) {
    this.hostId = hostId;
  }

  public String getOSEXTSRVATTRHost() {
    return OSEXTSRVATTRHost;
  }

  @XmlElement(namespace="OS-EXT-SRV-ATTR", name="host")
  public void setOSEXTSRVATTRHost(String OSEXTSRVATTRHost) {
    this.OSEXTSRVATTRHost = OSEXTSRVATTRHost;
  }
}

    和服务器状态响应类...

    import java.util.ArrayList;
import java.util.List;

public class ServerStatusResponse {

  private List<Server> servers = new ArrayList<Server>();

  public List<Server> getServers() {
    return servers;
  }

  public void setServers(List<Server> servers) {
    this.servers = servers;
  }

}

    【讨论】：

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