Android 创建与解析XML(五)—— Dom4j方式
1、Dom4j概述
dom4j is an easy to use, open source library for working with XML, XPath and XSLT on the Java platform using the Java Collections Framework and with full support for DOM, SAX and JAXP.
2、Dom4j 创建 XML
Dom4j,创建xml主要用到了org.dom4j.DocumentHelper、org.dom4j.Document、org.dom4j.io.OutputFormat、org.dom4j.io.XMLWriter
首先,DocumentHelper.createDocument(),创建 org.dom4j.Document 的实例 doc
接着,通过doc,设置xml属性doc.setXMLEncoding("utf-8")、doc.addElement("root")根节点,以及子节点等
然后,定义xml格式并输出,new XMLWriter(xmlWriter, outputFormat)
Code
- /** Dom4j方式,创建 XML */
- public String dom4jXMLCreate(){
- StringWriter xmlWriter = new StringWriter();
- Person []persons = new Person[3]; // 创建节点Person对象
- persons[0] = new Person(1, "sunboy_2050", "upload/201211161559041024.png" />
3、Dom4j 解析 XML
Dom4j,解析xml主要用到了org.dom4j.io.SAXReader、org.dom4j.Document、doc.getRootElement(),以及ele.getName()、ele.getText()等
首先,创建SAXReader的实例reader,读入xml字节流 reader.read(is)
接着,通过doc.getRootElement()得到root根节点,利用迭代器取得root下一级的子节点eleRoot.elementIterator()等
然后,得到解析的xml内容xmlWriter.append(xmlHeader)、xmlWriter.append(personsList.get(i).toString())
解析一:标准解析(Iterator 迭代)
Code
- /** Dom4j方式,解析 XML */
- public String dom4jXMLResolve(){
- StringWriter xmlWriter = new StringWriter();
- InputStream is = readXML(fileName);
- try {
- SAXReader reader = new SAXReader();
- org.dom4j.Document doc = reader.read(is);
- List<Person> personsList = null;
- Person person = null;
- StringBuffer xmlHeader = new StringBuffer();
- Element eleRoot = doc.getRootElement(); // 获得root根节点,引用类为 org.dom4j.Element
- String attrAuthor = eleRoot.attributeValue("author");
- String attrDate = eleRoot.attributeValue("date");
- xmlHeader.append("root").append("\t\t");
- xmlHeader.append(attrAuthor).append("\t");
- xmlHeader.append(attrDate).append("\n");
- personsList = new ArrayList<Person>();
- // 获取root子节点,即person
- Iterator<Element> iter = eleRoot.elementIterator();
- for(; iter.hasNext(); ) {
- Element elePerson = (Element)iter.next();
- if("person".equals(elePerson.getName())){
- person = new Person();
- // 获取person子节点,即id、name、blog
- Iterator<Element> innerIter = elePerson.elementIterator();
- for(; innerIter.hasNext();) {
- Element ele = (Element)innerIter.next();
- if("id".equals(ele.getName())) {
- String id = ele.getText();
- person.setId(Integer.parseInt(id));
- } else if("name".equals(ele.getName())) {
- String name = ele.getText();
- person.setName(name);
- } else if("blog".equals(ele.getName())) {
- String blog = ele.getText();
- person.setBlog(blog);