eclipse/maven/sonatype 战争构建在命令行中有效，但在 eclipse 中无效

Question

我的（简单）war 项目在命令行中使用 mvn:package 构建良好，但无法通过 sonatype 插件使用 maven 在 eclipse 中构建。 我得到的错误是：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-war-plugin:2.1-alpha-1:war (default-war) on project shoploops_webapp: Execution default-war of goal org.apache.maven.plugins:maven-war-plugin:2.1-alpha-1:war failed: dependenciesInfo : dependenciesInfo
---- Debugging information ----
message             : dependenciesInfo : dependenciesInfo
cause-exception     : com.thoughtworks.xstream.mapper.CannotResolveClassException
cause-message       : dependenciesInfo : dependenciesInfo
class               : org.apache.maven.plugin.war.util.WebappStructure
required-type       : org.apache.maven.plugin.war.util.WebappStructure
path                : /webapp-structure/dependenciesInfo
line number         : 14

我真的有两个问题 1）我该如何解决这个错误？ 2) 为什么 mvn:package 在命令行可以正常工作，但不能通过插件？它们的工作方式有什么不同，以至于会出现这样的错误？

非常感谢！

编辑：在调试模式下运行的堆栈跟踪：

Caused by: com.thoughtworks.xstream.converters.ConversionException: dependenciesInfo : dependenciesInfo
---- Debugging information ----
message             : dependenciesInfo : dependenciesInfo
cause-exception     : com.thoughtworks.xstream.mapper.CannotResolveClassException
cause-message       : dependenciesInfo : dependenciesInfo
class               : org.apache.maven.plugin.war.util.WebappStructure
required-type       : org.apache.maven.plugin.war.util.WebappStructure
path                : /webapp-structure/dependenciesInfo
line number         : 14
-------------------------------
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:63)
    at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:117)
    at com.thoughtworks.xstream.core.ReferenceByXPathMarshallingStrategy.unmarshal(ReferenceByXPathMarshallingStrategy.java:29)
    at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:846)
    at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:833)
    at com.thoughtworks.xstream.XStream.fromXML(XStream.java:781)
    at org.apache.maven.plugin.war.util.WebappStructureSerializer.fromXml(WebappStructureSerializer.java:48)
    at org.apache.maven.plugin.war.AbstractWarMojo.buildWebapp(AbstractWarMojo.java:346)
    at org.apache.maven.plugin.war.AbstractWarMojo.buildExplodedWebapp(AbstractWarMojo.java:317)
    at org.apache.maven.plugin.war.WarMojo.performPackaging(WarMojo.java:166)
    at org.apache.maven.plugin.war.WarMojo.execute(WarMojo.java:130)
    at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:105)
    ... 15 more
Caused by: com.thoughtworks.xstream.mapper.CannotResolveClassException: dependenciesInfo : dependenciesInfo
    at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:49)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:76)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:60)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:76)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
    at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:34)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.determineType(AbstractReflectionConverter.java:296)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:178)
    at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:125)
    at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56)
    ... 28 more

Answer 1

您需要转到preferences->maven->installation 并选择您的外部安装。我正在使用 springsource 工具套件。但其他 Eclipse 品种中的 maven 配置路径应该是相同的。

Answer 2

我也遇到了同样的问题，但我做了一个mvn install。在命令行中工作正常，但在 Eclipse 中失败。

实际发生的事情显然是我的webapp-cache.xml 文件已损坏。我解决了运行mvn clean install的问题。

Answer 3

为什么mvn:package 在命令行可以正常工作，但不能通过插件？它们的工作方式有什么不同，以至于会出现这样的错误？

简短的版本是 m2eclipse 确实不使用您在命令行中使用的相同版本，除非您告诉他这样做（这是我的建议）。如果您想知道，m2eclipse 使用嵌入式 Maven 3 (Maven Embedder 3.0.0.200912160759)。

我该如何解决这个错误？

实际上，问题记录在http://jira.codehaus.org/browse/MWAR-187，它提供了几种解决方法。

• 将 maven-war-plugin 降级为 2.1-alpha-1

• 通过修改 maven-war-plugin 配置来停用缓存

  <configuration>
    <useCache>false</useCache>
  </configuration>
  

而且我认为将 M2Eclipse 配置为不使用 Maven Embedder（但您在 CLI 上使用的版本）也可以解决问题，这是我的建议。您可以在 Window > Preferences > Maven 中找到此设置。