jackson出現錯誤 Unrecognized field，JsonIgnoreProperties忽略不起作用

錯誤描述

錯誤堆棧信息如下：

org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "test" (Class com.unicompayment.mmp.front.dto.MarketingEventDto), not marked as ignorable
 at [Source: java.io.ByteArrayInputStream@74d5f001; line: 1, column: 13] (through reference chain: com.unicompayment.mmp.front.dto.MarketingEventDto["test"])
    at org.jboss.resteasy.core.MessageBodyParameterInjector.inject(MessageBodyParameterInjector.java:183) ~[resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.core.MethodInjectorImpl.injectArguments(MethodInjectorImpl.java:89) ~[resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:112) ~[resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.core.ResourceMethodInvoker.invokeOnTarget(ResourceMethodInvoker.java:288) ~[resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:242) ~[resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.core.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:229) ~[resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:356) [resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:179) [resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:220) [resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:56) [resteasy-jaxrs-3.0.7.Final.jar:na]
    at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:51) [resteasy-jaxrs-3.0.7.Final.jar:na]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) [servlet-api.jar:na]
    at com.alibaba.dubbo.rpc.protocol.rest.DubboHttpServer$RestHandler.handle(DubboHttpServer.java:86) [dubbo-2.8.4.jar:2.8.4]
    at com.alibaba.dubbo.remoting.http.servlet.DispatcherServlet.service(DispatcherServlet.java:64) [dubbo-2.8.4.jar:2.8.4]
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727) [servlet-api.jar:na]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303) [catalina.jar:7.0.59]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.59]
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat7-websocket.jar:7.0.59]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.59]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.59]
    at com.alibaba.druid.support.http.WebStatFilter.doFilter(WebStatFilter.java:124) [druid-1.0.4.jar:1.0.4]
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241) [catalina.jar:7.0.59]
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208) [catalina.jar:7.0.59]
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220) [catalina.jar:7.0.59]
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122) [catalina.jar:7.0.59]
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:504) [catalina.jar:7.0.59]
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170) [catalina.jar:7.0.59]
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103) [catalina.jar:7.0.59]
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950) [catalina.jar:7.0.59]
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116) [catalina.jar:7.0.59]
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421) [catalina.jar:7.0.59]
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1074) [tomcat-coyote.jar:7.0.59]
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611) [tomcat-coyote.jar:7.0.59]
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314) [tomcat-coyote.jar:7.0.59]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_79]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_79]
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-coyote.jar:7.0.59]
    at java.lang.Thread.run(Thread.java:745) [na:1.7.0_79]
Caused by: org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field "test" (Class com.unicompayment.mmp.front.dto.MarketingEventDto), not marked as ignorable

解決方案

請求的JSON裏面字段多餘映射的實體類，可以通過在類的頂部添加@JsonIgnoreProperties

我最初引入2.X（jackson-annotations-2.7.8.jar）

<dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>2.7.8</version>
        </dependency>

但是com.fasterxml.jackson.annotation.JsonIgnoreProperties沒起作用，仍然報上述錯誤，查了很多網上資料沒有找到原因，沒有解決問題。
後來看到一篇國外資料：http://stackoverflow.com/questions/20986995/jsonignoreproperties-not-working

分析可能是jar版本衝突導致的生效，具體如下：

官方WIKI：https://github.com/FasterXML/jackson-databind/wiki
jackson 1.x和2.x版本的註解是放置在不同的包下的
1.x是在jackson core jar包org.codehaus.jackson.annotate下
2.x是在jackson-databind包com.fasterxml.jackson.annotation下

而且從堆棧錯誤信息路徑是 org.codehaus.jackson.map.exc.UnrecognizedPropertyException，懷疑應該調用與包路徑一致的1.x版本的jackson core jar包，因此引入新的jar

<dependency>
  <groupId>org.codehaus.jackson</groupId>
  <artifactId>jackson-core-asl</artifactId>
  <version>1.9.12</version>

路徑重新引用爲

import org.codehaus.jackson.annotate.JsonIgnoreProperties;、

@JsonIgnoreProperties(ignoreUnknown = true)
public class MarketingEventDto implements Serializable {

    private static final long serialVersionUID = -398950270706722135L;

    private String mmpFlowNo;

    .....
}

重新部署測試，不再報錯，解決該問題。

參考資料：
1）http://stackoverflow.com/questions/20986995/jsonignoreproperties-not-working
2）http://blog.csdn.net/sdyy321/article/details/40298081