XMLBodyVariableResolver.java 文件源码

public static String extractValueFromXml(String name, HttpServletRequest request) {
    try {
        DocumentBuilderFactory builderFactory =
                DocumentBuilderFactory.newInstance();
        DocumentBuilder builder = builderFactory.newDocumentBuilder();
        Document document = builder.parse(((MockkidRequest) request).getSafeInputStream());

        XPath xPath =  XPathFactory.newInstance().newXPath();
        String expression = name.replace("body", "").replaceAll("\\.", "/");
        String result = xPath.compile(expression).evaluate(document);
        if (result.isEmpty()) return null; //empty string can mean node doesn't exist, or value is empty
        return result;
    } catch (Exception e) {
        logger.warn("Couldn't extract variable", e);
    }
    return null;
}