dom4j 忽略 dtd 验证

在使用dom4j 对 xml文件解析时经常会碰到dtd验证的问题。
像下面的声明：

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
<hibernate-configuration>
...

在读取的时候会遇到如下错误信息:

org.dom4j.DocumentException: Connection timed out: connect Nested exception: Connection timed out: connect
	at org.dom4j.io.SAXReader.read(SAXReader.java:484)
	at org.dom4j.io.SAXReader.read(SAXReader.java:264)

解决方法：

reader.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);

更多代码如下：

try {
			File file = new File("F:/zhucaiguai/hibernate.cfg.xml");

			SAXReader reader = new SAXReader();
			
			reader.setFeature("http://apache.org/xml/features/nonvalidating/load-external-dtd", false);
		
			Document doc = reader.read(file);

			Element root = doc.getRootElement();
			
			System.out.println(root.asXML());
			

//			OutputFormat format = new OutputFormat();
//			XMLWriter output = new XMLWriter(new FileWriter(file), format);// 更新XML文件
//			output.write(doc);
//			output.close();

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