common_helper/src/main/java/com/xiongyingqi/util/xml/DomUtils.java
public static String getChildElementValueByTagName(Element ele, String childEleName) {
        Element child = getChildElementByTagName(ele, childEleName);
        return (child != null ? getTextValue(child) : null);
    }
public static String getChildElementValueByTagName(Element ele, String childEleName) {
        Element child = getChildElementByTagName(ele, childEleName);
        return (child != null ? getTextValue(child) : null);
    }
Utility method that returns the first child element value identified by its name.

@param ele          the DOM element to analyze
@param childEleName the child element name to look for
@return the extracted text value, or {@code null} if no child element found