Question

我有这个密码:

    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    DocumentBuilder builder = factory.newDocumentBuilder();
    DOMImplementation impl = builder.getDOMImplementation();
    Document xmldoc = impl.createDocument(null, null, null);

    Element root = xmldoc.createElement("root");
    Element textElement = xmldoc.createElement("text");
    Text textNode = xmldoc.createTextNode("");
    root.appendChild(textElement);
    textElement.appendChild(textNode);

    OutputFormat of = new OutputFormat("XML","UTF-8",true);
    of.setIndent(1);
    of.setIndenting(true);

    ByteArrayOutputStream stream = new ByteArrayOutputStream();

    XMLSerializer serializer = new XMLSerializer(stream, of);
    // As a DOM Serializer
    serializer.asDOMSerializer();
    serializer.serialize(root);

    System.out.println(stream.toString());

我就能控制住这一切:

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

但是,我喜欢得到这个:

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

Does anybody know, how to set the XMLSerializer to avoid Complex Empty Elements? Thanks.

Answer 1

我对 XMLSregister 不允许对空标签进行定制也有同样的问题。我的解决方案是扩展 XMLSregize 原代码, 并推翻序列 E元素方法 :

我复制了原代码并更改了关闭打印部分:

protected void serializeElement(Element elem) throws IOException ...

if (isSelfClosingElement(elem))
    _printer.printText("/>");
else
_printer.printText("></" + elem.getTagName() + ">");

" 强者 " 拥有自闭元素清单的 " 强者 " 持有自闭元素清单的 " 强者 "

NOTE: 额外, 您需要复制 < strong > printAttritte () 和 < strong > printNamespaceAttr () 方法, 因为它是私人标记, 而不是受保护的。

Answer 2

< 坚固 > 结果: 我不认为可能。 XMLS 序列器不支持这种配置。

Analysis: When you call serializer.serialize(root), BaseMarkupSerializer s serialize(Element) method is invoked. It defines type of node you pass 至 serialize and chooses appropriate way 至 deal with it.

在文本节点上,它称为XMLSregisters 序列元素(元素)

// If element has children, then serialize them, otherwise
// serialize en empty tag.       
if (elem.hasChildNodes()) {
    //... irrelevant code...
    endElementIO( null, null, tagName );
} else {
    //... irrelevant code...
    _printer.printText( "/>" ); // <------ HARDCODED, NON-CONFIGURABLE
    //... irrelevant code...
}

Problem: As you can see, way of closing empty element is hardcoded and not configurable (if you look for complete code snippet from source code).

Solution: Since XMLSerializer is not final, you could create your own serializer by extending it and overriding it s method. One of the ways would be changing:

_printer.printText( "/>" );

至

_printer.printText( "</" );
_printer.printText( elem.getTagName() );
_printer.printText( ">" );

Opinion: I am not sure if there is no clean solution and I see this solution as the last resort solution. Anyway, you should look yourself through the sources and/or documentation for more information.

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