java - 可运行 jar 创建的细节（Jersey & Genson）

Question

我每次都可以使用 Eclipse 的 Runnable Jar 向导创建一个可运行的 jar。如果我选中 Eclipse 的框以“另存为 ANT 脚本”，然后将该代码合并到 build.xml 中，然后让我们的 GitLab CI 进程进行构建并创建一个可运行的 jar，它会运行，但似乎找不到即使 .class 文件在那里，该 jar 中的一个类。

我不知道从哪里开始。Eclipse 构建与独立 java/ant 构建生成的 jar 文件相似，但不完全相同。有几件事出了问题，但目前我只能说这些了。

我怎样才能开始磨练这个？我的程序是 Jersey 网络客户端。我正在使用Genson，我在独立 jar 构建中收到的错误消息是

org.glassfish.jersey.message.internal.MessageBodyProviderNotFoundException: MessageBodyWriter not found for media type=application/json

但我可以列出 jar 文件并且都有这些条目

        47 Sun Mar 27 22:23:48 CDT 2016 META-INF/services/javax.ws.rs.ext.MessageBodyWriter
  1220 Thu Aug 07 14:08:08 CDT 2014 javax/ws/rs/ext/MessageBodyWriter.class            

现在我可以通过在 Eclipse 中构建并手动部署文件来解决它，但这当然是不可接受的。

编辑：感谢一位乐于助人的朋友，我被指出了 META-INF/services 的内容。我不知道这是什么意思，但这是两个罐子里的内容。

GitLab jar (get MessageBodyWriter error message)
     0 Sun Mar 27 22:23:48 CDT 2016 META-INF/services/
    47 Sun Mar 27 22:23:48 CDT 2016 META-INF/services/javax.json.spi.JsonProvider
    47 Sun Mar 27 22:23:48 CDT 2016 META-INF/services/javax.ws.rs.ext.MessageBodyReader
    47 Sun Mar 27 22:23:48 CDT 2016 META-INF/services/javax.ws.rs.ext.MessageBodyWriter
    47 Sun Mar 27 22:23:48 CDT 2016 META-INF/services/javax.ws.rs.ext.Providers
    50 Sun Mar 27 22:23:48 CDT 2016 META-INF/services/org.glassfish.jersey.internal.spi.AutoDiscoverable
    61 Fri May 27 19:08:18 CDT 2016 META-INF/services/org.glassfish.hk2.extension.ServiceLocatorGenerator
    60 Thu Oct 27 14:32:12 CDT 2016 META-INF/services/org.glassfish.jersey.internal.spi.AutoDiscoverable
    67 Thu Oct 27 14:32:12 CDT 2016 META-INF/services/javax.servlet.ServletContainerInitializer
    67 Thu Oct 27 14:32:12 CDT 2016 META-INF/services/org.glassfish.jersey.servlet.spi.AsyncContextDelegateProvider
    63 Thu Oct 27 14:32:12 CDT 2016 META-INF/services/org.glassfish.jersey.servlet.spi.FilterUrlMappingsProvider
    56 Thu Oct 27 14:32:12 CDT 2016 META-INF/services/org.glassfish.jersey.internal.spi.ForcedAutoDiscoverable
    56 Thu Oct 27 14:32:12 CDT 2016 META-INF/services/javax.ws.rs.ext.RuntimeDelegate
    73 Thu Oct 27 14:32:12 CDT 2016 META-INF/services/org.glassfish.jersey.internal.spi.AutoDiscoverable
   137 Thu Oct 27 14:32:12 CDT 2016 META-INF/services/org.glassfish.jersey.internal.spi.ForcedAutoDiscoverable
   855 Sun Oct 02 11:14:44 CDT 2016 META-INF/services/javax.annotation.processing.Processor

Eclipse jar (works)
      0 Tue Dec 13 08:55:42 CST 2016 META-INF/services/
     47 Tue Dec 13 08:55:42 CST 2016 META-INF/services/javax.json.spi.JsonProvider
     47 Tue Dec 13 08:55:42 CST 2016 META-INF/services/javax.ws.rs.ext.MessageBodyReader
     47 Tue Dec 13 08:55:42 CST 2016 META-INF/services/javax.ws.rs.ext.MessageBodyWriter
     47 Tue Dec 13 08:55:42 CST 2016 META-INF/services/javax.ws.rs.ext.Providers
     50 Tue Dec 13 08:55:42 CST 2016 META-INF/services/org.glassfish.jersey.internal.spi.AutoDiscoverable
     61 Tue Dec 13 08:55:42 CST 2016 META-INF/services/org.glassfish.hk2.extension.ServiceLocatorGenerator
     67 Tue Dec 13 08:55:42 CST 2016 META-INF/services/javax.servlet.ServletContainerInitializer
     67 Tue Dec 13 08:55:42 CST 2016 META-INF/services/org.glassfish.jersey.servlet.spi.AsyncContextDelegateProvider
     63 Tue Dec 13 08:55:42 CST 2016 META-INF/services/org.glassfish.jersey.servlet.spi.FilterUrlMappingsProvider
     56 Tue Dec 13 08:55:42 CST 2016 META-INF/services/org.glassfish.jersey.internal.spi.ForcedAutoDiscoverable
     56 Tue Dec 13 08:55:42 CST 2016 META-INF/services/javax.ws.rs.ext.RuntimeDelegate
    855 Tue Dec 13 08:55:44 CST 2016 META-INF/services/javax.annotation.processing.Processor

EDIT3：每个重复的 org.glassfish.jersey.internal.spi.AutoDiscoverable的内容（3）

1. com.owlike.genson.ext.jaxrs.JerseyAutoDiscoverable
2. org.glassfish.jersey.logging.LoggingFeatureAutoDiscoverable
3. org.glassfish.jersey.server.filter.internal.ServerFiltersAutoDiscoverable

org.glassfish.jersey.internal.spi.ForcedAutoDiscoverable (2)

1. org.glassfish.jersey.jaxb.in​​ternal.JaxbAutoDiscoverable
2. org.glassfish.jersey.logging.LoggingFeatureAutoDiscoverable

与 Eclipse 构建的“好”jar 文件相比，它没有重复项：

在org.glassfish.jersey.internal.spi.AutoDiscoverable com.owlike.genson.ext.jaxrs.JerseyAutoDiscoverable

我想我会研究其他 META-INF 的东西，所以看看能看到什么。

在org.glassfish.jersey.internal.spi.ForcedAutoDiscoverable org.glassfish.jersey.jaxb.in​​ternal.JaxbAutoDiscoverable