add method

hutool-core/src/main/java/cn/hutool/core/util/XmlUtil.java

@@ -1270,10 +1270,25 @@ public class XmlUtil {
 	 * @since 5.2.4
 	 */
 	public static Document beanToXml(Object bean, String namespace) {
+		return beanToXml(bean, namespace, false);
+	}
+
+	/**
+	 * 将Bean转换为XML
+	 *
+	 * @param bean       Bean对象
+	 * @param namespace  命名空间，可以为null
+	 * @param ignoreNull 时候忽略值为{@code null}的属性
+	 * @return XML
+	 * @see JAXBUtil#beanToXml(Object)
+	 * @since 5.7.10
+	 */
+	public static Document beanToXml(Object bean, String namespace, boolean ignoreNull) {
 		if (null == bean) {
 			return null;
 		}
-		return mapToXml(BeanUtil.beanToMap(bean), bean.getClass().getSimpleName(), namespace);
+		return mapToXml(BeanUtil.beanToMap(bean, false, ignoreNull),
+				bean.getClass().getSimpleName(), namespace);
 	}
 
 	/**

hutool-core/src/test/java/cn/hutool/core/util/XmlUtilTest.java

@@ -195,6 +195,33 @@ public class XmlUtilTest {
 		Assert.assertEquals("2020/04/15 21:01:21", value);
 	}
 
+	@Test
+	public void beanToXmlIgnoreNullTest() {
+		@Data
+		class TestBean {
+			private String ReqCode;
+			private String AccountName;
+			private String Operator;
+			private String ProjectCode;
+			private String BankCode;
+		}
+
+		final TestBean testBean = new TestBean();
+		testBean.setReqCode("1111");
+		testBean.setAccountName("账户名称");
+		testBean.setOperator("cz");
+		testBean.setProjectCode(null);
+		testBean.setBankCode("00001");
+
+		// 不忽略空字段情况下保留自闭标签
+		Document doc = XmlUtil.beanToXml(testBean, null, false);
+		Assert.assertNotNull(XmlUtil.getElement(doc.getDocumentElement(), "ProjectCode"));
+
+		// 忽略空字段情况下无自闭标签
+		doc = XmlUtil.beanToXml(testBean, null, true);
+		Assert.assertNull(XmlUtil.getElement(doc.getDocumentElement(), "ProjectCode"));
+	}
+
 	@Test
 	public void xmlToBeanTest() {
 		@Data