/**
	 * 利用反射將map集合封裝成bean對(duì)象
	 * 
	 * @param params
	 * @param clazz
	 * @return
	 */
	public static <T> T mapToBean(Map<String, Object> map, Class<?> clazz) throws Exception {
		Object obj = clazz.newInstance();
		if (map != null && !map.isEmpty() && map.size() > 0) {
			for (Map.Entry<String, Object> entry : map.entrySet()) {
				String propertyName = entry.getKey(); 	// 屬性名
				Object value = entry.getValue();		// 屬性值
				String setMethodName = "set" + propertyName.substring(0, 1).toUpperCase() + propertyName.substring(1);
				Field field = getClassField(clazz, propertyName);	//獲取和map的key匹配的屬性名稱
				if (field == null){
					continue;
				}
				Class<?> fieldTypeClass = field.getType();
				value = convertValType(value, fieldTypeClass);
				try {
					clazz.getMethod(setMethodName, field.getType()).invoke(obj, value);
				} catch (NoSuchMethodException e) {
					e.printStackTrace();
				}
			}
		}
		return (T) obj;
	}

	/**
	 * 根據(jù)給定對(duì)象類匹配對(duì)象中的特定字段
	 * @param clazz
	 * @param fieldName
	 * @return
	 */
	private static Field getClassField(Class<?> clazz, String fieldName) {
		if (Object.class.getName().equals(clazz.getName())) {
			return null;
		}
		Field[] declaredFields = clazz.getDeclaredFields();
		for (Field field : declaredFields) {
			if (field.getName().equals(fieldName)) {
				return field;
			}
		}
		Class<?> superClass = clazz.getSuperclass();	//如果該類還有父類，將父類對(duì)象中的字段也取出
		if (superClass != null) {						//遞歸獲取
			return getClassField(superClass, fieldName);
		}
		return null;
	}

	/**
	 * 將map的value值轉(zhuǎn)為實(shí)體類中字段類型匹配的方法
	 * @param value
	 * @param fieldTypeClass
	 * @return
	 */
	private static Object convertValType(Object value, Class<?> fieldTypeClass) {
		Object retVal = null;
		
		if (Long.class.getName().equals(fieldTypeClass.getName())
				|| long.class.getName().equals(fieldTypeClass.getName())) {
			retVal = Long.parseLong(value.toString());
		} else if (Integer.class.getName().equals(fieldTypeClass.getName())
				|| int.class.getName().equals(fieldTypeClass.getName())) {
			retVal = Integer.parseInt(value.toString());
		} else if (Float.class.getName().equals(fieldTypeClass.getName())
				|| float.class.getName().equals(fieldTypeClass.getName())) {
			retVal = Float.parseFloat(value.toString());
		} else if (Double.class.getName().equals(fieldTypeClass.getName())
				|| double.class.getName().equals(fieldTypeClass.getName())) {
			retVal = Double.parseDouble(value.toString());
		} else {
			retVal = value;
		}
		return retVal;
	}

public class ProductInfo {
	
	private Long id;
	private String name;
	private Double price;
	public Long getId() {
		return id;
	}
	public void setId(Long id) {
		this.id = id;
	}
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public Double getPrice() {
		return price;
	}
	public void setPrice(Double price) {
		this.price = price;
	}
	
	public ProductInfo(Long id, String name, Double price) {
		super();
		this.id = id;
		this.name = name;
		this.price = price;
	}
	
	public ProductInfo() {
		super();
	}
	
	@Override
	public String toString() {
		return "ProductInfo [id=" + id + ", name=" + name + ", price=" + price + "]";
	}
}

public static void main(String[] args) throws Exception {
		Map<String, Object> param = new HashMap<>();
		param.put("id", 12232);
		param.put("name", "banana");
		param.put("price", 12.25);
		ProductInfo info = mapToBean(param, ProductInfo.class);
		System.out.println(info.getName());
	}

/**
	 * 對(duì)象轉(zhuǎn)map
	 * @param obj
	 * @return
	 */
	private static Map<String, Object> objToMap(Object obj) {

		Map<String, Object> map = new HashMap<String, Object>();
		Field[] fields = obj.getClass().getDeclaredFields();	// 獲取f對(duì)象對(duì)應(yīng)類中的所有屬性域
		for (int i = 0, len = fields.length; i < len; i++) {
			String varName = fields[i].getName();
			varName = varName.toLowerCase();					// 將key置為小寫，默認(rèn)為對(duì)象的屬性
			try {
				boolean accessFlag = fields[i].isAccessible();	// 獲取原來的訪問控制權(quán)限
				fields[i].setAccessible(true);					// 修改訪問控制權(quán)限
				Object o = fields[i].get(obj);					// 獲取在對(duì)象f中屬性fields[i]對(duì)應(yīng)的對(duì)象中的變量
				if (o != null){
					map.put(varName, o.toString());
				}
				fields[i].setAccessible(accessFlag);			// 恢復(fù)訪問控制權(quán)限
			} catch (IllegalArgumentException ex) {
				ex.printStackTrace();
			} catch (IllegalAccessException ex) {
				ex.printStackTrace();
			}
		}
		return map;
	}

public static void main(String[] args) throws Exception {

		Map<String, Object> param = new HashMap<>();
		param.put("id", 12232);
		param.put("name", "banana");
		param.put("price", 12.25);

		ProductInfo info = mapToBean(param, ProductInfo.class);

		System.out.println(info.getName());
		
		System.out.println("---------------------");
		
		Map<String, Object> map = objToMap(info);
		
		System.out.println("對(duì)象轉(zhuǎn)map后的結(jié)果 : " + map);

	}