使用xStream工具包，在用 fromXml时，使用子类的 class,解析出来的对象为父对象。

Question

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Answer 1

private T toBean(String xmlStr, Class cls) {
XStream xstream = new XStream(new DomDriver());
xstream.addDefaultImplementation(子类.class, 父类.class);
xstream.processAnnotations(cls);
@SuppressWarnings("unchecked")
T t = (T) xstream.fromXML(xmlStr);
return t;
}