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 第一种方法

利用org.apache.commons.beanutils 工具类实现

    public static void main(String[] args) {
		UserBean user = new UserBean();
		Map<String, Object> map = new HashMap<String, Object>();
		map.put("name", "CSDN");
		map.put("gender", "male");
		map.put("age", 70);
		// 将map转换为bean
		transMap2Bean(map, user);
	}

	public static void transMap2Bean(Map<String, Object> map, Object obj) {
		if (map == null || obj == null) {
			return;
		}
		try {
			BeanUtils.populate(obj, map);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

测试截图

第二种方法

利用Introspector,PropertyDescriptor实现

	public static void main(String[] args) {		
		UserBean user2 = new UserBean();
		Map<String, Object> map2 = new HashMap<String, Object>();
		map2.put("name", "Alibaba");
		map2.put("gender", "male");
		map2.put("age", 70);
		transMap2Bean(map2, user2);
	}	
	public static void transMap2Bean(Map<String, Object> map, Object obj) {
		try {
			BeanInfo beanInfo = Introspector.getBeanInfo(obj.getClass());
			PropertyDescriptor[] propertyDescriptors = beanInfo.getPropertyDescriptors();
			for (PropertyDescriptor property : propertyDescriptors) {
				String key = property.getName();
				if (map.containsKey(key)) {
					Object value = map.get(key);
					// 得到property对应的setter方法
					Method setter = property.getWriteMethod();
					setter.invoke(obj, value);
				}
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
		return;
	}

 测试截图