Apache-dom4j的使用(一)

本节主要介绍如何用dom4j生成一个xml文档

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE catalog SYSTEM "file://x:/dtd/catalog.dtd">
<books>
	<!-- this is a test for dom4j. -->
	<book title="My Book">
		<author sex="male">
			<first-name>Zhuo</first-name>
			<last-name>YING</last-name>
		</author>
	</book>
</books>

用代码操作xml很简单，仅仅通过看方法名就可以得知。

public class TestMakeXML {

	public void generateDocument() {
		Document document = DocumentHelper.createDocument();

		Element books = document.addElement("books");
		books.addComment(" this is a test for dom4j. ");

		Element book = books.addElement("book");
		book.addAttribute("title", "My Book");

		Element author = book.addElement("author");
		author.addAttribute("sex", "male");

		Element first = author.addElement("first-name");
		Element last = author.addElement("last-name");

		first.addText("Zhuo");
		last.addText("YING");

		document.addDocType("books", null, "file://x:/dtd/catalog.dtd");

		try {
			XMLWriter output = new XMLWriter(new FileWriter(new File("d:/catalog/catalog.xml")));
			output.write(document);
			output.close();
		} catch (IOException e) {
			System.out.println(e.getMessage());
		}

	}

	public static void main(String[] argv) {
		TestMakeXML dom4j = new TestMakeXML();
		dom4j.generateDocument();
	}
}

稍微有一点要说明，最后xml保存到磁盘时，文件是必须已经存在了。