記錄maven java.lang.String cannot be cast to XX error

     在項目開發中自定義了一個maven plugin，在本地可以很好的工做，可是在ci server上卻沒法正常工做報錯爲：

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         at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:225)
         at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
         at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
         at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:84)
         at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:59)
         at org.apache.maven.lifecycle.internal.LifecycleStarter.singleThreadedBuild(LifecycleStarter.java:183)
         at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:161)
         at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:319)
         at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
         at org.jvnet.hudson.maven3.launcher.Maven3Launcher.main(Maven3Launcher.java:79)
         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
         at java.lang.reflect.Method.invoke(Method.java:601)
         at org.codehaus.plexus.classworlds.launcher.Launcher.launchStandard(Launcher.java:329)
         at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:239)
         at org.jvnet.hudson.maven3.agent.Maven3Main.launch(Maven3Main.java:146)
         at hudson.maven.Maven3Builder.call(Maven3Builder.java:127)
         at hudson.maven.Maven3Builder.call(Maven3Builder.java:74)
         at hudson.remoting.UserRequest.perform(UserRequest.java:118)
         at hudson.remoting.UserRequest.perform(UserRequest.java:48)
         at hudson.remoting.Request$2.run(Request.java:326)
         at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
         at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
         at java.util.concurrent.FutureTask.run(FutureTask.java:166)
         at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
         at java.lang.Thread.run(Thread.java:722)
Caused by: org.apache.maven.plugin.PluginExecutionException: A type incompatibility occured while executing [group id]:[artifact id]:[version]:start: java.lang.String cannot be cast to java.io.File
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      在花費了我大半的時間，將本地環境的maven，jdk等設爲和ci一致後最後定位到maven的版本問題，其終究緣由是由於maven在3.0.3才支持配置參數爲泛型集合(List<T>,Set<T>...)，在3.0.2及一下本班不支持此寫法。

     修改次error的方法有兩種：

1. 將ci Server的maven更新到3.0.3以上。(可是在咱們的ci server更新有些困難，還有本人認爲若是寫一個plugin只能工做的固定version，這和一個廢物差很少，因此選擇了第二種方法)。
2. 將泛型集合List<T>改成Array T[]。（項目中某大神寫的List<File>我輕易的改成File[].在執行前改成Arrays.asList(XXX)）;

     一切搞定。在此記錄但願對於碰見同類問題的人有所幫助。