Mule 找不到元素'；构造函数arg'；

运行时出错：

Caused by: org.xml.sax.SAXParseException; lineNumber: 34; columnNumber: 30; cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'constructor-arg'.
    at org.apache.xerces.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
    at org.apache.xerces.util.ErrorHandlerWrapper.error(Unknown Source)

资料来源：

<spring:bean id="HandlerA_id" name="HandlerA" class="Handler"> 
            <constructor-arg> 
                <ref bean="BeanA"></ref>  
            </constructor-arg>  
        </spring:bean> 

如果检查该URL处的xsd，您可以看到构造函数arg标记对组beanElements有效，这是“bean”中允许的复杂类型之一

---

运行时是否在某些情况下无法正确验证XML？

在标记中包含

spring:

前缀。ref标签也一样

"...http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd..."