使用java从生成的xml文档中删除xml声明

Question

String root = "RdbTunnels";
DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
Document document = documentBuilder.newDocument();
Element rootElement = document.createElement(root);
document.appendChild(rootElement);   

OutputFormat format = new OutputFormat(document);
format.setIndenting(true);


XMLSerializer serializer = new XMLSerializer(System.out, format);
serializer.serialize(document);

结果如下

<?xml version="1.0" encoding="UTF-8"?>
<RdbTunnels/>

但我需要从输出中删除xml声明我该怎么做

Answer 1

您是否看过Transformer使用的OutputKeys？特别是OMIT_XML_DECLARATION.

请注意,删除标头在XML 1.0中是有效的,但是丢失了字符编码数据(以及其他内容),这些数据非常重要.

Answer 2

加上这个

format.setOmitXMLDeclaration(true);

例

OutputFormat format = new OutputFormat(document);
format.setIndenting(true);
format.setOmitXMLDeclaration(true);