BeanUtils.copyProperties在拷贝属性时忽略空值的操作

/**
* 全属性copy对象
* 
**/
BeanUtils.copyProperties(Object source, Object target)

/**
* 忽略某些属性copy对象
* 
**/
BeanUtils.copyProperties(Object source, Object target, String... ignoreProperties)

/**
 * 获取需要忽略的属性
 * 
 * @param source
 * @return
 */
public static String[] getNullPropertyNames (Object source) {
    final BeanWrapper src = new BeanWrapperImpl(source);
    PropertyDescriptor[] pds = src.getPropertyDescriptors();
 
    Set<String> emptyNames = new HashSet<>();
    for(PropertyDescriptor pd : pds) {
        Object srcValue = src.getPropertyValue(pd.getName());
        // 此处判断可根据需求修改
        if (srcValue == null) {
            emptyNames.add(pd.getName());
        }
    }
    String[] result = new String[emptyNames.size()];
    return emptyNames.toArray(result);
}

Map paramMap = new HashMap();
String jsonStr = JSONObject.toJSONString(paramMap);
Object infoDo = JSON.parseObject(jsonStr, Object.class);

<dependency>
 <groupId>commons-beanutils</groupId>
 <artifactId>commons-beanutils</artifactId>
 <version>1.8.3</version>
</dependency>

/**
 * Bean转map
 * 
 * @param bean
 * @return
 */
public Map describe(Object bean);
 
/**
 * map转bean
 * 
 * @param bean
 * @param map
 */
public void populate (Object bean, Map map);

/**
 * 按指定的属性列表赋值对象
 *
 * @param source
 * @param target
 * @param properties
 *
 */
public static void copyWithProperties(Object source, Object target, List<String> properties) throws IllegalAccessException, NoSuchMethodException, InvocationTargetException {
    for (String property : properties) {
        PropertyUtils.setProperty(target, property, PropertyUtils.getProperty(source, property));
    }
}

BeanUtils.copyProperties(dest, orig);

ConvertUtils.register(new DateConverter(null), java.util.Date.class);

ConvertUtils.register(new IntegerConverter(null), Integer.class);