XML文件操作（2）

2.DOM解析

 1 //获得工厂
 2 DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
 3 //获得解析对象
 4 DocumentBuilder builder=dbf.nwDocumentBuilder();
 5 //读取资源文件
 6 InputStream is=getResources().openRawResource(R.raw.books);
 7 Document doc=builder.parse(is);
 8 //获得books的所有子节点
 9 NodeList list=doc.getElementsByTagName("book");
10 for(int i=0;i<list.getLength();i++){
11 Element element=(Element) list.item(i);
12 //获得name子节点的值
13 String valueString=element.getElementsByTagName("name")
14 .item(0).getFirstChild().getNodeValue();
15 Toast.makeText(this, valueString, 3000).show();
16 }

3.PULL解析

 1 // 创建解析器工厂
 2 XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
 3 // 创建解析器对象
 4 XmlPullParser parser = factory.newPullParser();
 5 // 读取资源文件
 6 InputStream is = getResources().openRawResource(R.raw.books);
 7 // 设置输入流对象和编码格式
 8 parser.setInput(is, "UTf-8");
 9 // 获取事件类型
10 int type = parser.getEventType();
11 while (type != XmlPullParser.END_DOCUMENT) {
12 // 获取标签名称
13 String name = parser.getName();
14 
15 if ("name".equals(name)&&type==XmlPullParser.START_TAG) {
16 type=parser.next();
17 Toast.makeText(this, parser.getText(), 300).show();
18 }
19 type=parser.next();
20 }

文件操作
//保存文件的操作

 1  try {
 2     OutputStream os=openFileOutput("a.txt",Activity.MODE_PRIVATE );
 3     PrintWriter pw=new PrintWriter(os);
 4     pw.println("abcdefg");
 5     pw.println("hijkmnl");
 6     pw.close();
 7 } catch (FileNotFoundException e) {
 8     // TODO Auto-generated catch block
 9     e.printStackTrace();
10     }

//读取文件操作

 1 try {
 2 FileInputStream fis=openFileInput("a.txt");
 3 BufferedReader bra=new BufferedReader(
 4 new InputStreamReader(fis));
 5 String str=null;
 6 while ((str=bra.readLine())!=null) {
 7 Log.i("str", str);
 8 }
 9 } catch (FileNotFoundException e) {
10 // TODO Auto-generated catch block
11 e.printStackTrace();
12 } catch (IOException e) {
13 // TODO Auto-generated catch block
14 e.printStackTrace();
15 }