JSON, Java Servlet'te Desteleştirilemiyor Servlet

Question

Son nokta, gelen JSON'u anlamıyor.

Ben Postacı kullanarak "platform" için anahtar/değer içeren JSON post ediyorum, başlığıyla: Burada

uç nokta var Content-Type

application/json olarak Ama bu durum almak: com.owlike.genson.JsonBindingException: Could not deserialize to type class org.json.JSONObject

Illegal character at row 0 and column 1 expected { but read '-' !

Ama ben: sorun ile ilgisi var gibi

görünüyor m oldukça emin Postacı

İşte stacktrace daha fazlası var ... geçerli JSON gönderme edilmelidir:

09-Jul-2014 10:30:00.017 SEVERE [http-nio-8080-exec-4] com.sun.jersey.spi.container.ContainerResponse.logException Mapped exception to response: 500 (Internal Server Error) 
javax.ws.rs.WebApplicationException: com.owlike.genson.JsonBindingException: Could not deserialize to type class org.json.JSONObject 
    at com.owlike.genson.ext.jaxrs.GensonJsonConverter.readFrom(GensonJsonConverter.java:127) 
    at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:474) 
    at com.sun.jersey.server.impl.model.method.dispatch.EntityParamDispatchProvider$EntityInjectable.getValue(EntityParamDispatchProvider.java:123) 
    at com.sun.jersey.server.impl.inject.InjectableValuesProvider.getInjectableValues(InjectableValuesProvider.java:46) 
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$EntityParamInInvoker.getParams(AbstractResourceMethodDispatchProvider.java:153) 
    at com.sun.jersey.server.impl.model.method.dispatch.AbstractResourceMethodDispatchProvider$ResponseOutInvoker._dispatch(AbstractResourceMethodDispatchProvider.java:203) 
    at com.sun.jersey.server.impl.model.method.dispatch.ResourceJavaMethodDispatcher.dispatch(ResourceJavaMethodDispatcher.java:75) 
    at com.sun.jersey.server.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.java:288) 
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) 
    at com.sun.jersey.server.impl.uri.rules.ResourceClassRule.accept(ResourceClassRule.java:108) 
    at com.sun.jersey.server.impl.uri.rules.RightHandPathRule.accept(RightHandPathRule.java:147) 
    at com.sun.jersey.server.impl.uri.rules.RootResourceClassesRule.accept(RootResourceClassesRule.java:84) 
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1469) 
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1400) 
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1349) 
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1339) 
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416) 
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:537) 
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:699) 
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:725) 
    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:219) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:136) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) 
    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:610) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:526) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1078) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:655) 
    at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:222) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1566) 
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1523) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) 
    at java.lang.Thread.run(Thread.java:744) 
Caused by: com.owlike.genson.JsonBindingException: Could not deserialize to type class org.json.JSONObject 
    at com.owlike.genson.Genson.deserialize(Genson.java:391) 
    at com.owlike.genson.ext.jaxrs.GensonJsonConverter.readFrom(GensonJsonConverter.java:125) 
    ... 41 more 
Caused by: com.owlike.genson.stream.JsonStreamException: Illegal character at row 0 and column 1 expected { but read '-' ! 
    at com.owlike.genson.stream.JsonReader.newWrongTokenException(JsonReader.java:949) 
    at com.owlike.genson.stream.JsonReader.begin(JsonReader.java:425) 
    at com.owlike.genson.stream.JsonReader.beginObject(JsonReader.java:157) 
    at com.owlike.genson.reflect.BeanDescriptor.deserialize(BeanDescriptor.java:101) 
    at com.owlike.genson.reflect.BeanDescriptor.deserialize(BeanDescriptor.java:90) 
    at com.owlike.genson.convert.BeanViewConverter.deserialize(BeanViewConverter.java:102) 
    at com.owlike.genson.convert.NullConverter$NullConverterWrapper.deserialize(NullConverter.java:56) 
    at com.owlike.genson.Genson.deserialize(Genson.java:389) 
    ... 42 more 

Answer 1

Bu ideal bir çözüm olmayabilir, ancak çalışabileceğini düşünüyorum. Umarım

Zaten Jackson JSON bağımlılığı ...

buradan bulabilirsiniz: http://mvnrepository.com/artifact/com.fasterxml.jackson.core/jackson-core

ben şu kodu denemek: Soruyorum

@POST 
@Path("/{department}/{team}") 
@Consumes(MediaType.APPLICATION_JSON) 
@Produces(MediaType.APPLICATION_JSON) 
public Response handleJSON(String json, @PathParam("department") String department,  @PathParam("team") String team){ 

    ObjectMapper mapper = new ObjectMapper(); 
    JsonNode node = mapper.readValue(json, JsonNode.class); 

    MyObj myObj = new MyObj(); 

    myObj.setDepartment(department); 
    myObj.setTeam(team); 

    if (node.get("platform") != null) { 
     myObj.setPlatform(node.get("platform").textValue()); 
    } 

    saveObj(myObj); 

    return Response.ok(true).build(); 

} 

Bildirimi senin WS Framework bana JSON'u bir String olarak iletiyor ve sadece kendim hallediyor. Belki de ideal değil, ama çalışmalı.

Şerefe!

Answer 2

Ben kullandığınız ama büyük olasılıkla bu Jettison veya Jackson olacak JSON serileştiricisi bilmiyorum. Bildiğim kadarıyla, org.json.JSONObject örneğini doğrudan dönüştürmeyi desteklemiyorlar. daha yaygın yolu basitçe özel Java Beans kullanmaktır:

public class Foo implements Serializable { 

    private String platform; 

    // getters + setters 

} 

@POST 
@Path("/{department}/{team}") 
@Consumes(MediaType.APPLICATION_JSON) 
@Produces(MediaType.APPLICATION_JSON) 
public Response handleJson(Foo foo, @PathParam("department") String department, @PathParam("team") String team) { 
    ... 
    myObj.setPlatform(foo.getPlatform()); 
    ... 
} 

Foo Eğer jettison kullanıyorsanız @XmlRootElement ile açıklamalı edilmelidir.

Eğer Bean her biriminin size parametre olarak Object, Map veya String kullanabilir ve kendi başınıza serileştirebilirsiniz bekliyoruz bir özel oluşturmak için istemiyorsanız:

@POST 
@Path("/{department}/{team}") 
@Consumes(MediaType.APPLICATION_JSON) 
@Produces(MediaType.APPLICATION_JSON) 
public Response handleJson(String json, @PathParam("department") String department, @PathParam("team") String team) { 
    ... 
    JSONObject jsonObject = new JSONObject(json); 
    myObj.setPlatform(json.optString("platform")); 
    ... 
} 

Son solüsyon MessageBodyReader uyguluyor hangi JSONObject işler. Basit örnek:

@Provider 
public class JsonObjectReader implements MessageBodyReader<JSONObject> { 

    @Override 
    public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) { 
     return type == JSONObject.class && MediaType.APPLICATION_JSON_TYPE.equals(mediaType); 
    } 

    @Override 
    public JSONObject readFrom(Class<JSONObject> type, Type genericType, 
      Annotation[] annotations, MediaType mediaType, 
      MultivaluedMap<String, String> httpHeaders, InputStream entityStream) 
      throws IOException, WebApplicationException { 
     return new JSONObject(IOUtils.toString(entityStream)); 
    } 

}