List范型使用Java反射Demo

public static <T> T parseXmlNode(T t, Element root) {
        Field[] declaredFields = t.getClass().getDeclaredFields();
 
        for (Field field : declaredFields) {
            try {
                Class<?> type = field.getType();
 
                if(List.class.getTypeName().equals(type.getName())){
                    //List
                    List list = new ArrayList<>();
                    List<Element> parentNodeList = XmlUtil.getElements(root, field.getName());
                    for (Element parentNode : parentNodeList) {
                        ParameterizedType listGenericType = (ParameterizedType) field.getGenericType();
                        Class<T> t1 = (Class<T>) listGenericType.getActualTypeArguments()[0];
                        T instance = t1.newInstance();
                        //递归
                        instance = parseBiXmlNode(instance, parentNode);
                        list.add(instance);
                    }
                    String fieldName = field.getName();
                    String setMethodName = getFieldSetMethodName(fieldName);
 
                    Method method = t.getClass().getMethod(setMethodName, type);
                    method.invoke(t, list);
                } else if (String.class.getName().equals(type.getName())) {
                    //String
                    String fieldName = field.getName();
                    String setMethodName = getFieldSetMethodName(fieldName);
                    Method method = t.getClass().getMethod(setMethodName, String.class);
                    method.invoke(t, getXmlNodeValue(root, fieldName));
                } else {
                    Element parentNode = XmlUtil.getElement(root, field.getName());
                    T t1 = (T) type.newInstance();
                    t1 = parseBiXmlNode(t1, parentNode);
                    String fieldName = field.getName();
                    String setMethodName = getFieldSetMethodName(fieldName);
                    Method method = t.getClass().getMethod(setMethodName, type);
                    method.invoke(t, t1);
                }
            } catch (InstantiationException e) {
                log.error("parseXmlNode error, field={}, error={}", field.getName(), e);
            } catch (IllegalAccessException e) {
                log.error("parseXmlNode error, field={}, error={}", field.getName(), e);
            } catch (NoSuchMethodException e) {
                log.error("parseXmlNode error, field={}, error={}", field.getName(), e);
            } catch (InvocationTargetException e) {
                log.error("parseXmlNode error, field={}, error={}", field.getName(), e);
            } catch (Exception e) {
                log.error("parseXmlNode error, field={}, error={}", field.getName(), e);
            }
        }
 
        return t;
    }

原文链接:https://blog.csdn.net/niuhea/article/details/109748543