XML文件操作（二）

 

2.DOM解析

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

3.PULL解析

// 创建解析器工厂
XmlPullParserFactory factory = XmlPullParserFactory.newInstance();
// 创建解析器对象
XmlPullParser parser = factory.newPullParser();
// 读取资源文件
InputStream is = getResources().openRawResource(R.raw.books);
// 设置输入流对象和编码格式
parser.setInput(is, "UTf-8");
// 获取事件类型
int type = parser.getEventType();
while (type != XmlPullParser.END_DOCUMENT) {
// 获取标签名称
String name = parser.getName();

if ("name".equals(name)&&type==XmlPullParser.START_TAG) {
type=parser.next();
Toast.makeText(this, parser.getText(), 300).show();
}
type=parser.next();
}

文件操作
//保存文件的操作

 try {
    OutputStream os=openFileOutput("a.txt",Activity.MODE_PRIVATE );
    PrintWriter pw=new PrintWriter(os);
    pw.println("abcdefg");
    pw.println("hijkmnl");
    pw.close();
} catch (FileNotFoundException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }

//读取文件操作

try {
FileInputStream fis=openFileInput("a.txt");
BufferedReader bra=new BufferedReader(
new InputStreamReader(fis));
String str=null;
while ((str=bra.readLine())!=null) {
Log.i("str", str);
}
} catch (FileNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}