我使用自定义对象映射器在Java对象中序列化/反序列化Json。 我还在Jax-RS应用程序接口（Jersey）上注册了自定义对象映射器。
public class AppConfiguration extends ResourceConfig {
public AppConfiguration() {
/../
register(ObjectMapperProvider.class);
register(JacksonFeature.class);
/../
}
}
@Provider
public class ObjectMapperProvider implements ContextResolver<ObjectMapper> {
private final ObjectMapper defaultObjectMapper;
public ObjectMapperProvider() {
defaultObjectMapper = createDefaultMapper();
}
public ObjectMapper getContext(Class<?> type) {
return defaultObjectMapper;
}
private static ObjectMapper createDefaultMapper() {
final ObjectMapper result = new ObjectMapper();
result.enable(SerializationFeature.INDENT_OUTPUT);
result.registerModule(new Jdk8Module());
result.registerModule(new JavaTimeModule());
result.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
return result;
}
}
当我将Json发送到Post WS方法时，Jackson无法转换为java对象并抛出
java.util.LinkedHashMap cannot be cast to fr.solaire.facturation.model.MatriceComplexite
当我使用普通ObjectMapper时，一切都按预期工作，但我不想在项目的任何地方复制此代码。
你有什么想法吗？
@POST
@Produces(APPLICATION_JSON) @Consumes(APPLICATION_JSON)
public MatriceComplexite saveEntity(MatriceComplexite entityJson) {
return matriceComplexiteRepository.save(entityJson);
}
我有以下错误。
09-Dec-2015 11:46:32.369 SEVERE [557] org.apache.catalina.core.StandardWrapperValve.invoke Servlet.service() for servlet [SpringApplication] in context with path [/mediation-webapp] threw exception [java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to fr.solaire.facturation.model.MatriceComplexite] with root cause
java.lang.ClassCastException: java.util.LinkedHashMap cannot be cast to fr.solaire.facturation.model.MatriceComplexite
at fr.solaire.facturation.ws.impl.MatriceComplexiteServiceImpl.saveEntity(MatriceComplexiteServiceImpl.java:22)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$TypeOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:205)
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)
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:471)
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:425)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:383)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:336)
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:223)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Unknown Source)
编辑： 我写了这个方法来确认序列化/反序列化是否运行良好。
@POST
@Path("/string")
@Produces(MediaType.APPLICATION_JSON)
@Consumes(MediaType.APPLICATION_JSON)
@ApiOperation(value = "Save an entity",
notes = "Must provide an entity in Json Format",
produces = MediaType.APPLICATION_JSON, consumes = MediaType.APPLICATION_JSON)
public String saveEntity(String entityJson) throws IOException {
return new ObjectMapper().writeValueAsString(new ObjectMapper().readValue(entityJson, MatriceComplexite.class));
}
编辑2：我忘了删除ObjectMapperProvider上的@Produces和@Consumes。它只是在stackoverflow上测试其他主题。
编辑3：在我的pom.xml上，我有：
<dependency>
<groupId>org.glassfish.jersey.media</groupId>
<artifactId>jersey-media-json-jackson</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.jaxrs</groupId>
<artifactId>jackson-jaxrs-json-provider</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jsr310</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.datatype</groupId>
<artifactId>jackson-datatype-jdk8</artifactId>
<version>2.6.3</version>
</dependency>
编辑4：我设置了一个接口，我将saveEntity方法放在其中，并且它是通用的。为了简化这篇文章，我不发布这个界面，但它看起来像是主要问题。
此方法：
@POST
@Produces(APPLICATION_JSON) @Consumes(APPLICATION_JSON)
public MatriceComplexite saveEntity(MatriceComplexite entityJson) {
return matriceComplexiteRepository.save(entityJson);
}
此方法继承自接口中定义的方法，我使用泛型。我没有把JAX RS注释放在实现的类上。 在界面中：
public interface GenericRepository<T> extends JpaRepository<T, ID extends Serializable>{
@POST
@Produces(APPLICATION_JSON) @Consumes(APPLICATION_JSON)
T saveEntity(T entityJson);
}
另一个界面我只有以下定义：
public interface MatriceComplexiteRepository extends GenericRepository<MatriceComplexite>{}
我在卡塔琳娜身上看到了这种警告：
警告1 saveEntity的参数T不是具体类
我将查看泽西岛的GenericType。
编辑5： 昨天，我登录了tomcat
WARNING: Parameter 1 of type T from public fr.solaire.facturation.model.MatriceComplexite fr.solaire.facturation.ws.impl.MatriceComplexiteServiceImpl.saveEntity(fr.solaire.facturation.model.MatriceComplexite) is not resolvable to a concrete type.
WARNING: Parameter 2 of type T from public fr.solaire.facturation.model.MatriceComplexite fr.solaire.facturation.ws.impl.MatriceComplexiteServiceImpl.updateEntity(java.lang.String,fr.solaire.facturation.model.MatriceComplexite) is not resolvable
任何想法？