Question

在运行应用程序时遇到以下错误，编译期间没有问题。请帮助，如何解决这个问题。

ERROR [localhost-startStop-1] 2014-09-26 19:19:19,050 org.codehaus.groovy.grails.web.context.GrailsContextLoaderListener.error(213) : Error initializing the application: Error creating bean with name 'flowBuilderServices': Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'org.springframework.expression.spel.standard.SpelExpressionParser' to required type 'org.springframework.binding.expression.ExpressionParser' for property 'expressionParser'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.expression.spel.standard.SpelExpressionParser] to required type [org.springframework.binding.expression.ExpressionParser] for property 'expressionParser': no matching editors or conversion strategy found
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'flowBuilderServices': Initialization of bean failed; nested exception is org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'org.springframework.expression.spel.standard.SpelExpressionParser' to required type 'org.springframework.binding.expression.ExpressionParser' for property 'expressionParser'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.expression.spel.standard.SpelExpressionParser] to required type [org.springframework.binding.expression.ExpressionParser] for property 'expressionParser': no matching editors or conversion strategy found
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: org.springframework.beans.ConversionNotSupportedException: Failed to convert property value of type 'org.springframework.expression.spel.standard.SpelExpressionParser' to required type 'org.springframework.binding.expression.ExpressionParser' for property 'expressionParser'; nested exception is java.lang.IllegalStateException: Cannot convert value of type [org.springframework.expression.spel.standard.SpelExpressionParser] to required type [org.springframework.binding.expression.ExpressionParser] for property 'expressionParser': no matching editors or conversion strategy found
    ... 4 more
Caused by: java.lang.IllegalStateException: Cannot convert value of type [org.springframework.expression.spel.standard.SpelExpressionParser] to required type [org.springframework.binding.expression.ExpressionParser] for property 'expressionParser': no matching editors or conversion strategy found

Answer 1

您使用的插件是什么？我升级到Grails 2.4.3时遇到了同样的异常，只是缩小了它（这并不容易）Grails WebFlow插件和ACL插件都设置了一个名为expressionParser的bean，但是每个插件都使用了不同的类...一个是在Spring bean的Grails初始化期间覆盖另一个。通过在WebFlowPluginSupport.groovy文件中将Web流插件的expressionParser重命名为flowExpressionParser，我能够解决此异常。你可以在你的插件目录中搜索'expressionParser'，看看你是否有使用它的＆gt; 1插件。

我已经让webflow插件的人知道了，这里有更多细节。 https://jira.grails.org/browse/GPWEBFLOW-109

Grails 2.4.3升级 - Spring Security ACl - SpelExpressionParser

1 个答案: