// 1、创建一个DocumentBuilderFactory
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
System.out.println("dbf:"+dbf);
// 2、创建DocumentBuilder
try {
DocumentBuilder db = dbf.newDocumentBuilder();
System.out.println("db:"+db);
// 3、通过DocumentBuilder对象解析器,使用parse()的多个重载方法就可以解析xml了
File file = new File("books.xml");
System.out.println(file.exists()); //true
Document document = db.parse("books.xml");
System.out.println(document); //[#document: null]
} catch (ParserConfigurationException e) {
e.printStackTrace();
} catch (SAXException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
输出结果如下:
dbf:com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl@22e3ac
db:com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl@10f3bd7
true
[#document: null]
明明这个xml文件存在,解析出的Document就是null??