将xml的model 节点属性转化为Map , 再将Map 转为javaBen

将XML节点转换成Map

private static Map<Object, Object> convertNodeToMap(
			Iterator<Element> modelIt, Object parentObj) {
		Map<Object, Object> beanMap = new HashMap<Object, Object>();
		if (modelIt != null) {// 表目录
			// Iterator<Element> modelIt = modelEl.elementIterator();
			while (modelIt.hasNext()) {
				Element propertyEl = modelIt.next();
				String name = propertyEl.attributeValue("name");// 属情
				String value = propertyEl.attributeValue("value");// 值
				String foreign_key = propertyEl.attributeValue("foreign-key");
				String today_value = propertyEl.attributeValue("today-value");

				String date_format = propertyEl.attributeValue("date-format");
				if (date_format != null) {
					df.applyPattern(date_format);
				}
				java.lang.Object valueObj = null;
				if (foreign_key != null && foreign_key.equals("true")) {
					valueObj = parentObj;
				} else if (today_value != null && today_value.equals("true")) {
					valueObj = df.format(new Date());
				} else {
					valueObj = value;
				}

				beanMap.put(name, valueObj);

			}
		}
		return beanMap;
	}

2。将map转换成bean

	// 将Map转化为javaBean
	private static <T> T convertMapToBean(Class<T> type, Map<Object, Object> map)
			throws IntrospectionException, InstantiationException,
			IllegalAccessException {
		BeanInfo beanInfo = Introspector.getBeanInfo(type); // 获取类属性
		T t = type.newInstance(); // 创建 JavaBean 对象

		// 给 JavaBean 对象的属性赋值
		for (PropertyDescriptor descriptor : beanInfo.getPropertyDescriptors()) {
			String propertyName = descriptor.getName();
			if (map.containsKey(propertyName)) {
				// 下面一句可以 try 起来，这样当一个属性赋值失败的时候就不会影响其他属性赋值。
				String value = ConvertUtils.convert(map.get(propertyName));
				Object[] args = new Object[1];

				try {
					args[0] = df.parse(value);
				} catch (ParseException e) {
					args[0] = ConvertUtils.convert(value,
							descriptor.getPropertyType());
				}

				try {
					descriptor.getWriteMethod().invoke(t, args);
				} catch (IllegalArgumentException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (InvocationTargetException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}

			}
		}
		return t;
	}

3.// 将javaBean 转化为 Map

private static <T> Map<Object, Object> convertBeanToMap(Object bean)
			throws IntrospectionException {
		Class type = bean.getClass();
		Map returnMap = new HashMap();
		BeanInfo beanInfo = Introspector.getBeanInfo(type);

		PropertyDescriptor[] propertyDescriptors = beanInfo
				.getPropertyDescriptors();
		for (int i = 0; i < propertyDescriptors.length; i++) {
			PropertyDescriptor descriptor = propertyDescriptors[i];
			String propertyName = descriptor.getName();
			if (!propertyName.equals("class")) {
				Method readMethod = descriptor.getReadMethod();

				try {
					Object result = readMethod.invoke(bean, new Object[0]);
					returnMap.put(propertyName, result);
				} catch (Exception e) {
					// TODO Auto-generated catch block
					logger.debug("解析方法名:" + readMethod + ",有误!");
					// e.printStackTrace();
				}

			}
		}
		return returnMap;
	}

	// 将Map转化为javaBean
	private static <T> T convertMapToBean(Class<T> type, Map<Object, Object> map)
			throws IntrospectionException, InstantiationException,
			IllegalAccessException {
		BeanInfo beanInfo = Introspector.getBeanInfo(type); // 获取类属性
		T t = type.newInstance(); // 创建 JavaBean 对象

		// 给 JavaBean 对象的属性赋值
		for (PropertyDescriptor descriptor : beanInfo.getPropertyDescriptors()) {
			String propertyName = descriptor.getName();
			if (map.containsKey(propertyName)) {
				// 下面一句可以 try 起来，这样当一个属性赋值失败的时候就不会影响其他属性赋值。
				String value = ConvertUtils.convert(map.get(propertyName));
				Object[] args = new Object[1];

				try {
					args[0] = df.parse(value);
				} catch (ParseException e) {
					args[0] = ConvertUtils.convert(value,
							descriptor.getPropertyType());
				}

				try {
					descriptor.getWriteMethod().invoke(t, args);
				} catch (IllegalArgumentException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				} catch (InvocationTargetException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}

			}
		}
		return t;
	}

}