BeanUtils.copyProperties在拷贝属性时忽略空值的操作

BeanUtils.copyProperties(Object source, Object target)

BeanUtils.copyProperties(Object source, Object target, String... ignoreProperties)

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>

public Map describe(Object bean);
 

public void populate (Object bean, Map map);

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);