背景：我正在使用 Worklight 适配器来使用 restful 服务。Apache wink是我宁静的实现servlet。我jackson在我的服务中使用了相关的罐子。
问题：如果我尝试使用form-urlencoded类型的服务，它运行顺利。但是，当我尝试使用时JSON，它会在从适配器发送的 JSON 字符串的第一个字符上出现解析异常而失败。
相关的实现和异常，如下。
使用服务的适配器代码（在 worklight 服务器中运行）：
var input = {
method : 'post',
returnedContentType : 'json',
path : loginRequestPath,
headers : { 'Content-Type': 'application/json' },
parameters:{“commonname": username, "password" : password }
};
return WL.Server.invokeHttp(input);
Jackson 注册（直接从 IBM 复制）。即使我完全删除了这段代码，也会发生同样的异常。
public Set<Object> getSingletons() {
Set<Object> s = new HashSet<Object>();
// Register the Jackson provider for JSON
// Make (de)serializer use a subset of JAXB and (afterwards) Jackson annotations
// See http://wiki.fasterxml.com/JacksonJAXBAnnotations for more information
ObjectMapper mapper = new ObjectMapper();
AnnotationIntrospector primary = new JaxbAnnotationIntrospector();//new JacksonAnnotationIntrospector();
AnnotationIntrospector secondary = new JacksonAnnotationIntrospector();
AnnotationIntrospector pair = new AnnotationIntrospector.Pair(primary, secondary);
mapper.getDeserializationConfig().setAnnotationIntrospector(pair);//setAnnotationIntrospector(pair);
mapper.getSerializationConfig().setAnnotationIntrospector(pair);
// Set up the provider
JacksonJaxbJsonProvider jaxbProvider = new JacksonJaxbJsonProvider();
jaxbProvider.setMapper(mapper);
s.add(jaxbProvider);
return s;
}
我的构建路径中与杰克逊相关的 JAR 列表：
对于 Apache wink，我使用过：
wink、wink client、wink common 和 wink server jars (1.4)。
例外：
16:39:18,143 INFO [STDOUT] 16:39:18,142 ERROR [RequestProcessor] An unhandled exception occurred which will be propagated to the container.
org.codehaus.jackson.JsonParseException: Unexpected character ('c' (code 99)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
at [Source: org.apache.wink.server.internal.log.Requests$LoggedServletInputStream@2ed482c6; line: 1, column: 2]
at org.codehaus.jackson.JsonParser._constructError(JsonParser.java:1433)
at org.codehaus.jackson.impl.JsonParserMinimalBase._reportError(JsonParserMinimalBase.java:521)
at org.codehaus.jackson.impl.JsonParserMinimalBase._reportUnexpectedChar(JsonParserMinimalBase.java:442)
at org.codehaus.jackson.impl.Utf8StreamParser._handleUnexpectedValue(Utf8StreamParser.java:2090)
at org.codehaus.jackson.impl.Utf8StreamParser._nextTokenNotInObject(Utf8StreamParser.java:606)
at org.codehaus.jackson.impl.Utf8StreamParser.nextToken(Utf8StreamParser.java:492)
at org.codehaus.jackson.map.ObjectMapper._initForReading(ObjectMapper.java:2761)
at org.codehaus.jackson.map.ObjectMapper._readValue(ObjectMapper.java:2682)
at org.codehaus.jackson.map.ObjectMapper.readValue(ObjectMapper.java:1308)
at org.codehaus.jackson.jaxrs.JacksonJsonProvider.readFrom(JacksonJsonProvider.java:398)
at org.apache.wink.server.internal.registry.ServerInjectableFactory$EntityParam.getValue(ServerInjectableFactory.java:200)
at org.apache.wink.common.internal.registry.InjectableFactory.instantiate(InjectableFactory.java:68)
at org.apache.wink.server.internal.handlers.CreateInvocationParametersHandler.handleRequest(CreateInvocationParametersHandler.java:44)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
at org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleResourceMethod(FindResourceMethodHandler.java:151)
at org.apache.wink.server.internal.handlers.FindResourceMethodHandler.handleRequest(FindResourceMethodHandler.java:65)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
at org.apache.wink.server.internal.handlers.FindRootResourceHandler.handleRequest(FindRootResourceHandler.java:95)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
at org.apache.wink.server.internal.handlers.HeadMethodHandler.handleRequest(HeadMethodHandler.java:53)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
at org.apache.wink.server.internal.handlers.OptionsMethodHandler.handleRequest(OptionsMethodHandler.java:46)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
at org.apache.wink.server.internal.handlers.SearchResultHandler.handleRequest(SearchResultHandler.java:33)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
at org.apache.wink.server.internal.log.ResourceInvocation.handleRequest(ResourceInvocation.java:92)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
at org.apache.wink.server.internal.log.Requests.handleRequest(Requests.java:76)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:26)
at org.apache.wink.server.handlers.RequestHandlersChain.handle(RequestHandlersChain.java:22)
at org.apache.wink.server.handlers.AbstractHandlersChain.doChain(AbstractHandlersChain.java:63)
at org.apache.wink.server.handlers.AbstractHandlersChain.run(AbstractHandlersChain.java:48)
at org.apache.wink.server.internal.RequestProcessor.handleRequestWithoutFaultBarrier(RequestProcessor.java:207)
at org.apache.wink.server.internal.RequestProcessor.handleRequest(RequestProcessor.java:154)
at org.apache.wink.server.internal.servlet.RestServlet.service(RestServlet.java:119)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:190)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:92)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
at java.lang.Thread.run(Unknown Source)
需要考虑的事项：
在适配器代码中，在 parameter parameters:{“commonname": username, "password" : password }中，第一个字符总是失败。这次是c，所以失败了c（代码 99 是 的对应ASCII值c）。
如果是: parameters:{“username": username, "password" : password }，它将失败u并且相应的代码更改为其ASCII值，即 117。
我还尝试使用单引号而不是双引号、无引号和转义引号。每次它在第一个字符上失败。
我还尝试显式创建 JSON 并将其作为参数传递，例如：
var credentials = JSON.stringify({'username': username, 'password': password});
parameters: {"credentials":credentials} //still fails in first char
//also as parameters: {credentials} :
//this fails in adapter itself for wrong type of parameter
我的想法是：
由于解析失败，我认为要么我尝试从适配器发送 JSON 的方式不是正确的方式，要么我没有正确注册 Jackson，因此它无法正确解析 JSON。但是我完全迷失了在哪里寻找这个问题。
我非常感谢大家花时间阅读这个长问题和任何有用的输入。