xml解析中的异常

XML code

<connection src = “a" dest ="b" direction="c">
        <channel  type="test" />
</connection>

Java code

Node child=
doc.getElementsByTagName("connection").item(i).getChildNodes().item(0);
Element element=(Element)child;

会弹出一个异常
java.lang.ClassCastException: com.sun.org.apache.xerces.internal.dom.DeferredTextImpl cannot be cast to org.w3c.dom.Element

求助解决方法！！

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