读取XML文件，解析XML文件
1.读取XML文件

（1）inputStream类型
Document document = null;                try                {                    builder = factory.newDocumentBuilder();                                    }                catch (ParserConfigurationException e1)                {                    // TODO Auto-generated catch block                    e1.printStackTrace();                }                                try                {                    document = builder.parse(xmlData);                }                catch (SAXException e1)                {                    // TODO Auto-generated catch block                    e1.printStackTrace();                }                catch (IOException e1)                {                    // TODO Auto-generated catch block                    e1.printStackTrace();                }                               Element element = document.getDocumentElement();