java – com.fasterxml.jackson.core.JsonParseException：意外的字符

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我正在使用Jersey使用Java(JAX-RS)构建REST API,并使用Jackson作为JSON处理器.当我尝试将json数据发布到服务时,我收到以下错误：

Sep 17, 2012 9:43:35 PM com.sun.jersey.spi.container.ContainerResponse mapMappableContainerException
SEVERE: The exception contained within MappableContainerException could not be mapped to a response, re-throwing to the HTTP container
com.fasterxml.jackson.core.JsonParseException: Unexpected character ('h' (code 104)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: org.mortbay.jetty.HttpParser$Input@549b6976; line: 1, column: 2]
    at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1284)
    at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:588)
    at com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:509)
    at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._handleUnexpectedValue(UTF8StreamJsonParser.java:2094)
    at com.fasterxml.jackson.core.json.UTF8StreamJsonParser._nextTokenNotInObject(UTF8StreamJsonParser.java:612)
    at com.fasterxml.jackson.core.json.UTF8StreamJsonParser.nextToken(UTF8StreamJsonParser.java:498)
    at com.fasterxml.jackson.databind.ObjectReader._initForReading(ObjectReader.java:997)
    at com.fasterxml.jackson.databind.ObjectReader._bind(ObjectReader.java:883)
    at com.fasterxml.jackson.databind.ObjectReader.readValue(ObjectReader.java:471)
    at com.fasterxml.jackson.jaxrs.json.JacksonJsonProvider.readFrom(JacksonJsonProvider.java:443)
    at com.sun.jersey.spi.container.ContainerRequest.getEntity(ContainerRequest.java:483)
    at com.sun.jersey.server.impl.model.method.dispatch.EntityParamDispatchProvider$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:302)
    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:1480)
    at com.sun.jersey.server.impl.application.WebApplicationImpl._handleRequest(WebApplicationImpl.java:1411)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1360)
    at com.sun.jersey.server.impl.application.WebApplicationImpl.handleRequest(WebApplicationImpl.java:1350)
    at com.sun.jersey.spi.container.servlet.WebComponent.service(WebComponent.java:416)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:538)
    at com.sun.jersey.spi.container.servlet.ServletContainer.service(ServletContainer.java:716)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at com.google.inject.servlet.ServletDefinition.doServiceImpl(ServletDefinition.java:278)
    at com.google.inject.servlet.ServletDefinition.doService(ServletDefinition.java:268)
    at com.google.inject.servlet.ServletDefinition.service(ServletDefinition.java:180)
    at com.google.inject.servlet.ManagedServletPipeline.service(ManagedServletPipeline.java:93)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:85)
    at com.googlecode.objectify.cache.AsyncCacheFilter.doFilter(AsyncCacheFilter.java:59)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
    at quotes.auth.BraceletFilter.doFilter(BraceletFilter.java:58)
    at quotes.util.AbstractFilter.doFilter(AbstractFilter.java:48)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
    at com.google.appengine.tools.appstats.AppstatsFilter.doFilter(AppstatsFilter.java:141)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
    at com.googlecode.objectify.cache.AsyncCacheFilter.doFilter(AsyncCacheFilter.java:59)
    at com.googlecode.objectify.ObjectifyFilter.doFilter(ObjectifyFilter.java:49)
    at com.google.inject.servlet.FilterChainInvocation.doFilter(FilterChainInvocation.java:82)
    at com.google.inject.servlet.ManagedFilterPipeline.dispatch(ManagedFilterPipeline.java:120)
    at com.google.inject.servlet.GuiceFilter$1.call(GuiceFilter.java:132)
    at com.google.inject.servlet.GuiceFilter$1.call(GuiceFilter.java:129)
    at com.google.inject.servlet.GuiceFilter$Context.call(GuiceFilter.java:206)
    at com.google.inject.servlet.GuiceFilter.doFilter(GuiceFilter.java:129)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.HeaderVerificationFilter.doFilter(HeaderVerificationFilter.java:35)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.api.blobstore.dev.ServeBlobFilter.doFilter(ServeBlobFilter.java:60)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.StaticFileFilter.doFilter(StaticFileFilter.java:125)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at com.google.appengine.tools.development.BackendServersFilter.doFilter(BackendServersFilter.java:97)
    at org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
    at org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
    at org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
    at org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
    at com.google.appengine.tools.development.DevAppEngineWebAppContext.handle(DevAppEngineWebAppContext.java:94)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at com.google.appengine.tools.development.JettyContainerService$ApiProxyHandler.handle(JettyContainerService.java:370)
    at org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
    at org.mortbay.jetty.Server.handle(Server.java:326)
    at org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
    at org.mortbay.jetty.HttpConnection$RequestHandler.content(HttpConnection.java:938)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:755)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:218)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
    at org.mortbay.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:409)
    at org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)

这是我尝试发布的json数据：

{"id":null,"name":"Jack"}

有什么想法解决这个问题吗？提前致谢.

编辑：

这是POST方法：

@POST
@Consumes(MediaType.APPLICATION_JSON)
public Response createModelInstance(Category model, @Context UriInfo uriInfo) {

    ofy().save().entity(model);
    URI uri = uriInfo.getAbsolutePathBuilder().clone().path(model.getId().toString()).build();
    Response response = Response.created(uri).build();

    return response;
}

这里是分类模型：

@Entity
@NoArgsConstructor
public class Category {

    @Getter
    @Id
    Long id;

    @Getter
    @Setter
    String name;

    public Category(String name) {
        this.name = name;
    }
}

解决方法:

问题是@Context应该作为第一个参数而不是第二个参数传递.

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