如何使用JDOM在文件中添加standalone =“ no”？

Question

我在这里找到了如何将XML文档的打印输出覆盖到Eclipse控制台中，使其包含standalone =“ no”的方法 ，但是如何将standalone =“ no”写入文件？ 我尝试将同一文档写入文件，但仍无法打印出独立=“ no” 。 换句话说，当我尝试写入文件时，覆盖的方法不起作用。

写入文件时还有其他方法应重写吗？ 这是什么问题？

private static void writeXML() {

try {

Document doc = new Document();

Element theRoot = new Element("tvshows");
doc.setRootElement(theRoot);

Element show = new Element("show");
Element name = new Element("name");
name.setAttribute("show_id", "show_001");

name.addContent(new Text("Life on Mars"));

Element network = new Element("network");
network.setAttribute("country", "US");

network.addContent(new Text("ABC"));

show.addContent(name);
show.addContent(network);

theRoot.addContent(show);

//-----------------------------

Element show2 = new Element("show");
Element name2 = new Element("name");
name2.setAttribute("show_id", "show_002");

name2.addContent(new Text("Life on Mars"));

Element network2 = new Element("network");
network2.setAttribute("country", "UK");

network2.addContent(new Text("BBC"));

show2.addContent(name2);
show2.addContent(network2);

theRoot.addContent(show2);

XMLOutputter xmlOutput = new XMLOutputter(Format.getPrettyFormat(), XMLOUTPUT);
//xmlOutput.output(doc, System.out);

xmlOutput.output(doc, new FileOutputStream(new File("./src/jdomMade.xml")));

System.out.println("The file has been written");

}
catch (Exception ex){
    ex.printStackTrace();
}


}

public static final XMLOutputProcessor XMLOUTPUT = new AbstractXMLOutputProcessor() {
@Override
protected void printDeclaration(final Writer out, final FormatStack fstack) throws IOException {
    write(out, "<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?> ");
    write(out, fstack.getLineSeparator());
}

};

Answer 1

您的代码位于;-)

 xmlOutput.output(doc, new FileOutputStream(new File("./src/jdomMade.xml"))); System.out.println("The file has been written"); 

println表示文件已写入，但尚未写入。

仅在刷新并关闭文件后才写入文件。 您不这样做。

您应该在代码中添加try-with-resources：

try (FileOutputStream fos = new FileOutputStream(new File("./src/jdomMade.xml"))) {
    xmlOutput.output(doc, fos);
}

System.out.println("The file has been written");