bean.aaa = "1,000";
        final Bean2 bean2 = new Bean2();
        BeanUtil.copyBeanToBean(bean, bean2, converter(new NumberConverter("#,##0")));
        assertThat(bean2.aaa, is(new Integer(1000)));
    }

    /**
     * @throws Exception
     */
    @Test
    public void testCopyBeanToMap() throws Exception {
        final SrcBean src = new SrcBean();
        src.aaa = "aaa";

     * @return 変換された文字列
     */
    public static String toString(final Document document) {
        assertArgumentNotNull("document", document);

        final StringBuilder buf = new StringBuilder(1000);
        appendElement(document.getDocumentElement(), buf);
        return new String(buf);
    }

    /**
     * {@link Element}を文字列に変換します。
     *
     * @param element