java.lang.LinkageError：Grails项目中的加载器约束违规

我已经用POI(包括poi-3.7和poi-ooxml-3.7)构建了一个Grails项目.我已经在项目的BuildConfig.groovy文件中添加了这2个外部库到依赖关系.当我编译它没有什么奇怪的.但是当我为该项目调用了命令“run-app”时,下面的stacktrace发生错误：

Base Directory: <path-to-my-project>
Resolving dependencies...
Dependencies resolved in 5546ms.
Running script D:\_TOOLS\STS\grails-1.3.5\scripts\RunApp.groovy
Environment set to development
Running Grails application..
2011-05-23 18:51:01,225 [main] ERROR context.GrailsContextLoader  - Error executing bootstraps: java.lang.LinkageError: loader constraint violation: loader (instance of <bootloader>) prevIoUsly initiated loading for a different type with name "org/w3c/dom/DOMConfiguration"
org.codehaus.groovy.runtime.InvokerInvocationException: java.lang.LinkageError: loader constraint violation: loader (instance of <bootloader>) prevIoUsly initiated loading for a different type with name "org/w3c/dom/DOMConfiguration"
    at grails.spring.BeanBuilder.invokeBeanDefiningClosure(BeanBuilder.java:723)
    at grails.spring.BeanBuilder.beans(BeanBuilder.java:573)
    at grails.spring.BeanBuilder.invokeMethod(BeanBuilder.java:519)
    at org.grails.tomcat.TomcatServer.start(TomcatServer.groovy:212)
    at grails.web.container.EmbeddableServer$start.call(UnkNown Source)
    at RunApp$_run_closure5_closure12.doCall(RunApp:158)
    at RunApp$_run_closure5_closure12.doCall(RunApp)
    at _GrailsSettings_groovy$_run_closure10.doCall(_GrailsSettings_groovy:280)
    at _GrailsSettings_groovy$_run_closure10.call(_GrailsSettings_groovy)
    at RunApp$_run_closure5.doCall(RunApp:149)
    at RunApp$_run_closure5.call(RunApp)
    at RunApp.runInline(RunApp:116)
    at RunApp.this$4$runInline(RunApp)
    at RunApp$_run_closure1.doCall(RunApp:59)
    at RunApp$_run_closure1.doCall(RunApp:33)
    at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
    at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
    at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
    at gant.Gant.withBuildListeners(Gant.groovy:427)
    at gant.Gant.this$2$withBuildListeners(Gant.groovy)
    at gant.Gant$this$2$withBuildListeners.callCurrent(UnkNown Source)
    at gant.Gant.dispatch(Gant.groovy:415)
    at gant.Gant.this$2$dispatch(Gant.groovy)
    at gant.Gant.invokeMethod(Gant.groovy)
    at gant.Gant.executeTargets(Gant.groovy:590)
    at gant.Gant.executeTargets(Gant.groovy:589)

Caused by: java.lang.LinkageError: loader constraint violation: loader (instance of <bootloader>) prevIoUsly initiated loading for a different type with name "org/w3c/dom/DOMConfiguration"
    at java.lang.class.getDeclaredMethods0(Native Method)
    at java.lang.class.privateGetDeclaredMethods(Class.java:2427)
    at java.lang.class.getDeclaredMethods(Class.java:1791)
    at java.security.AccessController.doPrivileged(Native Method)
    at org.codehaus.groovy.util.LazyReference.getLocked(LazyReference.java:46)
    at org.codehaus.groovy.util.LazyReference.get(LazyReference.java:33)
    at grails.spring.DynamicElementReader.invokeMethod(DynamicElementReader.groovy:121)
    ... 26 more

这里是我的配置：

dependencies {  
        provided ('com.oracle:ojdbc6_g:11.2.0.1.0')  
        runtime ('org.apache.poi:poi:3.7','org.apache.poi:poi-ooxml:3.7')  
    }

我该如何解决这个问题？非常感谢！

解决方法

这是我们终于在几个小时回来之后到来的修复.简而言之,从poi中排除xmlbeans,并创建另一个xmlbeans jar,并删除违规类.这是驱邪邪恶联动错误的咒语.

>修改BuildConfig.groovy

dependencies {
       compile ('org.apache.poi:poi-ooxml:3.6') {excludes "xmlbeans"}
    }

>提取xmlbeans

cd〜
mkdir xmlbeantmp
cd xmlbeantmp
cp〜/ .ivy2 / cache / org.apache.xmlbeans / xmlbeans / jars / xmlbeans-2.3.0.jar.
jar xf xmlbeans-2.3.0.jar
>删除违规类包

cd org
rm -rf w3c /
>重新创建jar

cd ../
rm xmlbean-2.3.0.jar
jar cf xmlbean-2.3.0.jar *
>将jar复制到您的项目库中

cp xmlbean-2.3.0.jar your_grails_project / lib /.
>显示爱情

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java.lang.LinkageError：Grails项目中的加载器约束违规

解决方法

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