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我有以下 groovy 代码，我在 grails 控制台插件上执行它。它工作正常。但是，我想在 grails 的服务中重用它。

@Grab( 'net.sourceforge.nekohtml:nekohtml:1.9.18' )

import org.cyberneko.html.parsers.SAXParser
def html = '''<p>
             |  I wanted to try to <span id="blk1">match</span> the inner part
             |  of the string<span id="blk2"> between </span> the span tags <span>where</span>
             |</p>'''.stripMargin()

def content = new XmlSlurper( new SAXParser() ).parseText( html )

List<String> spans = content.'**'.findAll { it.name() == 'SPAN' && it.@id?.text()?.startsWith( 'blk' ) }*.text()

尝试1：

    import groovy.grape.Grape;
    @Grab( 'net.sourceforge.nekohtml:nekohtml:1.9.18' )
class MyService {
//..
     
}

呃 ：

*** java.lang.instrument ASSERTION FAILED ***: "!errorOutstanding" with message can't create byte arrau at ../../../src/share/instrument/JPLISAgent.c line: 793

我试图在执行上述代码的方法之前添加@Grab 注释，但出现错误。我尝试将@Grab 放在上课前，结果相同；这也是一个错误。

我在哪里放@Grab 注释。

尝试2：

当我在 BuildConfig.groovy 中添加上述依赖项时，

runtime( 'net.sourceforge.nekohtml:nekohtml:1.9.18')

错误： 我收到以下错误：

grails> --stacktrace -Dserver.port=9090 run-app
| Packaging Grails application.....
| Error Error running script --stacktrace -Dserver.port=9090 run-app: org/apache/xerces/dom/DeferredElementNSImpl (NOTE: Stack trace has been filtered. Use --verbose to see entire trace.)
java.lang.NoClassDefFoundError: org/apache/xerces/dom/DeferredElementNSImpl
    at org.apache.xerces.dom.DeferredDocumentImpl.getNodeObject(Unknown Source)
    at org.apache.xerces.dom.DeferredDocumentImpl.synchronizeChildren(Unknown Source)
    at org.apache.xerces.dom.CoreDocumentImpl.getDocumentElement(Unknown Source)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at _GrailsPackage_groovy$_run_closure5.doCall(_GrailsPackage_groovy:74)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
    at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
    at _GrailsPackage_groovy$_run_closure2.doCall(_GrailsPackage_groovy:58)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
    at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantMetaClass.processClosure(GantMetaClass.java:81)
    at org.codehaus.gant.GantMetaClass.processArgument(GantMetaClass.java:95)
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:128)
    at RunApp$_run_closure1.doCall(RunApp.groovy:30)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantMetaClass.invokeMethod(GantMetaClass.java:133)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy:185)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16_closure18.doCall(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding.withTargetEvent(GantBinding.groovy:90)
    at org.codehaus.gant.GantBinding.this$4$withTargetEvent(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy:185)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at org.codehaus.gant.GantBinding$_initializeGantBinding_closure5_closure16.doCall(GantBinding.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at gant.Gant$_dispatch_closure5.doCall(Gant.groovy:381)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at gant.Gant$_dispatch_closure7.doCall(Gant.groovy:415)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at gant.Gant$_dispatch_closure7.doCall(Gant.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    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$this$2$withBuildListeners.callCurrent(Unknown Source)
    at gant.Gant.dispatch(Gant.groovy:415)
    at gant.Gant.this$2$dispatch(Gant.groovy)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at gant.Gant.invokeMethod(Gant.groovy)
    at gant.Gant.executeTargets(Gant.groovy:591)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
    at gant.Gant.executeTargets(Gant.groovy:590)
    at org.springsource.loaded.ri.ReflectiveInterceptor.jlrMethodInvoke(ReflectiveInterceptor.java:1243)
| Error Error running script --stacktrace -Dserver.port=9090 run-app: org/apache/xerces/dom/DeferredElementNSImpl

ATTEMPT3： 同样，在 BuildConfig.groovy 中添加依赖项也没有解决问题。

   dependencies {
        //....
       // .......
       compile( 'net.sourceforge.nekohtml:nekohtml:1.9.18'){
            excludes 'xercesImpl'
        }
    }

参考：http ://www.grailsforum.co.uk/showthread.php/2143-New-to-grails-problem-with-JAVA-jar-dependencies#post_message_2323

即使我使用上面的解决方案，它也只能在编译时工作。

ATTEMPT4：我执行以下命令来添加依赖项；但徒劳无功：

grails install-dependency net.sourceforge.nekohtml:nekohtml:1.9.18 --dir=lib

ERR 我得到了，这个错误信息：

 Packaging Grails application.....
| Error Error running script  run-app: org/apache/xerces/dom/DeferredElementNSImpl (Use --stacktrace to see the full trace)
4

1 回答 1

0

放置所有库的最佳实践：

  1. 在lib文件夹中然后引用，或在

    或者

  2. 在conf/BuildConfig.groovy

但是，如果要使用 Grape ，请使用以下语法：

import groovy.grape.Grape
Grape.grab(group:'net.sourceforge.nekohtml', module:'nekohtml', version:'1.9.18')

或者

groovy.grape.Grape.initGrape()
@Grab(group='net.sourceforge.nekohtml', module='nekohtml', version='1.9.18')
public class MyService{


}
于 2014-04-02T08:36:02.450 回答