关于jdom的问题.

java代码如下：
Element carElement = new Element("car");
Document myDocument = new Document(carElement);
carElement.addContent(new Element("year").addContent("1979"));
XMLOutputter outputter = new XMLOutputter(" ", true);
outputter.output(myDocument, System.out);

控制台输出结果如下：

1<car>
2<year>1979</year>
3</car>

请问如何改java代码可以使结果的第一行变为
"

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did you try
XMLOutputter outputter = new XMLOutputter(" ", true,"gb2312");
?