如何在grails web应用程序中使用grails REST Web服务？

Question

我已经成功创建了Grails REST Web服务。它以XML格式（http：// localhost：9001/GISServerRESTfulService/layout/show）工作并返回数据。但是当我尝试在另一个grails web应用程序中访问这个服务时，即使添加了HTTPBuilder-0.5.3 jar文件，它也没有运行。它给以下依赖关系解析错误：

Base Directory: C:\Pojects\Java Projects\GrailsRESTfulClient 
Resolving dependencies... 
Dependencies resolved in 703ms. 
Running script C:\grails\scripts\RunApp.groovy 
Error executing script RunApp: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.NodeImpl.getChildNodes()Lorg/w3c/dom/NodeList;" the class loader (instance of org/codehaus/groovy/grails/cli/support/GrailsRootLoader) of the current class, org/apache/xerces/dom/NodeImpl, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Node have different Class objects for the type org/w3c/dom/NodeList used in the signature 
java.lang.LinkageError: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.NodeImpl.getChildNodes()Lorg/w3c/dom/NodeList;" the class loader (instance of org/codehaus/groovy/grails/cli/support/GrailsRootLoader) of the current class, org/apache/xerces/dom/NodeImpl, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Node have different Class objects for the type org/w3c/dom/NodeList used in the signature 
     at org.apache.xerces.parsers.AbstractDOMParser.startDocument(Unknown Source) 
     at org.apache.xerces.impl.dtd.XMLDTDValidator.startDocument(Unknown Source) 
     at org.apache.xerces.impl.XMLDocumentScannerImpl.startEntity(Unknown Source) 
     at org.apache.xerces.impl.XMLVersionDetector.startDocumentParsing(Unknown Source) 
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) 
     at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) 
     at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) 
     at org.apache.xerces.parsers.DOMParser.parse(Unknown Source) 
     at org.apache.xerces.jaxp.DocumentBuilderImpl.parse(Unknown Source) 
     at org.apache.log4j.xml.DOMConfigurator$2.parse(DOMConfigurator.java:767) 
     at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:866) 
     at org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java:773) 
     at org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:483) 
     at org.apache.log4j.LogManager.<clinit>(LogManager.java:127) 
     at org.slf4j.impl.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:73) 
     at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:243) 
     at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:155) 
     at org.apache.commons.logging.impl.SLF4JLogFactory.getInstance(SLF4JLogFactory.java:131) 
     at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:685) 
     at org.springframework.core.io.support.PathMatchingResourcePatternResolver.<clinit>(PathMatchingResourcePatternResolver.java:169) 
     at java.lang.Class.forName0(Native Method) 
     at java.lang.Class.forName(Class.java:169) 
     at grails.util.PluginBuildSettings.class$(PluginBuildSettings.groovy) 
     at grails.util.PluginBuildSettings.$get$$class$org$springframework$core$io$support$PathMatchingResourcePatternResolver(PluginBuildSettings.groovy) 
     at grails.util.PluginBuildSettings.<clinit>(PluginBuildSettings.groovy:62) 
     at java.lang.Class.forName0(Native Method) 
     at java.lang.Class.forName(Class.java:169) 
     at _GrailsSettings_groovy.class$(_GrailsSettings_groovy) 
     at _GrailsSettings_groovy.$get$$class$grails$util$PluginBuildSettings(_GrailsSettings_groovy) 
     at _GrailsSettings_groovy.run(_GrailsSettings_groovy:78) 
     at _GrailsSettings_groovy$run.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at _GrailsClasspath_groovy$run.call(Unknown Source) 
     at org.codehaus.gant.IncludeTargets.leftShift(IncludeTargets.groovy:59) 
     at org.codehaus.gant.IncludeTargets$leftShift.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
     at _GrailsClasspath_groovy.run(_GrailsClasspath_groovy:33) 
     at _GrailsClasspath_groovy$run.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at _GrailsEvents_groovy$run.call(Unknown Source) 
     at org.codehaus.gant.IncludeTargets.leftShift(IncludeTargets.groovy:59) 
     at org.codehaus.gant.IncludeTargets$leftShift.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
     at _GrailsEvents_groovy.run(_GrailsEvents_groovy:31) 
     at _GrailsEvents_groovy$run.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at _GrailsClean_groovy$run.call(Unknown Source) 
     at org.codehaus.gant.IncludeTargets.leftShift(IncludeTargets.groovy:59) 
     at org.codehaus.gant.IncludeTargets$leftShift.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
     at _GrailsClean_groovy.run(_GrailsClean_groovy:29) 
     at _GrailsClean_groovy$run.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at _GrailsPlugins_groovy$run.call(Unknown Source) 
     at org.codehaus.gant.IncludeTargets.leftShift(IncludeTargets.groovy:59) 
     at org.codehaus.gant.IncludeTargets$leftShift.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
     at _GrailsPlugins_groovy.run(_GrailsPlugins_groovy:32) 
     at _GrailsPlugins_groovy$run.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at _GrailsRun_groovy$run.call(Unknown Source) 
     at org.codehaus.gant.IncludeTargets.leftShift(IncludeTargets.groovy:59) 
     at org.codehaus.gant.IncludeTargets$leftShift.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
     at _GrailsRun_groovy.run(_GrailsRun_groovy:31) 
     at _GrailsRun_groovy$run.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120) 
     at org.codehaus.gant.IncludeTargets.leftShift(IncludeTargets.groovy:59) 
     at org.codehaus.gant.IncludeTargets$leftShift.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:124) 
     at RunApp.run(RunApp.groovy:25) 
     at RunApp$run.call(Unknown Source) 
     at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:40) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116) 
     at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:120) 
     at gant.Gant.prepareTargets(Gant.groovy:606) 
     at org.codehaus.groovy.grails.cli.GrailsScriptRunner.executeWithGantInstance(GrailsScriptRunner.java:663) 
     at org.codehaus.groovy.grails.cli.GrailsScriptRunner.callPluginOrGrailsScript(GrailsScriptRunner.java:526) 
     at org.codehaus.groovy.grails.cli.GrailsScriptRunner.executeCommand(GrailsScriptRunner.java:310) 
     at org.codehaus.groovy.grails.cli.GrailsScriptRunner.main(GrailsScriptRunner.java:135) 
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
     at java.lang.reflect.Method.invoke(Method.java:597) 
     at org.codehaus.groovy.grails.cli.support.GrailsStarter.rootLoader(GrailsStarter.java:234) 
     at org.codehaus.groovy.grails.cli.support.GrailsStarter.main(GrailsStarter.java:262) 
Error executing script RunApp: loader constraint violation in interface itable initialization: when resolving method "org.apache.xerces.dom.NodeImpl.getChildNodes()Lorg/w3c/dom/NodeList;" the class loader (instance of org/codehaus/groovy/grails/cli/support/GrailsRootLoader) of the current class, org/apache/xerces/dom/NodeImpl, and the class loader (instance of <bootloader>) for interface org/w3c/dom/Node have different Class objects for the type org/w3c/dom/NodeList used in the signature 

我对grails和groovy很新。任何人有想法如何解决它？

在此先感谢。

Answer 1

试试这个线程groovy web services或本博客http://little418.com/2009/05/grails-throws-javalanglinkageerror-on-startup.html

两个依赖使用一种不同版本的库！