在BeanUtils注册自定义类型转换规则转换bean map

// 覆盖默认的String类型转换器，将LocalDateTime类型属性转换为时间戳文本
BeanUtilsBean.getInstance().getConvertUtils().register(new AbstractConverter() {
    @Override
    protected <T> T convertToType(final Class<T> type, final Object value) throws Throwable {
        if (String.class.equals(type) || Object.class.equals(type)) {
            return type.cast(value.toString());
        }
        throw conversionException(type, value);
    }

    @Override
    protected Class<?> getDefaultType() {
        return String.class;
    }

    @Override
    protected String convertToString(Object value) throws Throwable {
        if (value instanceof LocalDateTime) {
            return String.valueOf(((LocalDateTime) value).atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
        } else {
            return super.convertToString(value);
        }
    }
}, String.class);
// 注册LocalDateTime类型转换器，将时间戳文本转换为LocalDateTime
BeanUtilsBean.getInstance().getConvertUtils().register(new Converter() {
    @Override
    public <T> T convert(Class<T> type, Object value) {
        if (value == null) {
            return null;
        }
        return (T) LocalDateTime.ofInstant(Instant.ofEpochMilli(Long.valueOf((String) value)), ZoneId.systemDefault());
    }
}, LocalDateTime.class);