BeanUtils.copyProperties 在copy Integer类型问题

static {
ConvertUtils.register(new LongConverter(null), Long.class);
ConvertUtils.register(new ShortConverter(null), Short.class);
ConvertUtils.register(new IntegerConverter(null), Integer.class);
ConvertUtils.register(new DoubleConverter(null), Double.class);
ConvertUtils.register(new BigDecimalConverter(null), BigDecimal.class);
}