Android之解析XML的三种Demo！

Android解析XML有三种…..

1.使用DOM解析。

2.使用SAX解析。

3.使用Pull解析。

4.解析前的效果。



5.解析后的效果。



6.下面直接上代码,三种解析方法都在其中

`package com.thm.android_parsexml;

import android.os.AsyncTask;

import android.support.v7.app.AppCompatActivity;

import android.os.Bundle;

import android.util.Log;

import android.util.Xml;

import android.view.View;

import org.w3c.dom.Document;

import org.w3c.dom.Element;

import org.w3c.dom.Node;

import org.w3c.dom.NodeList;

import org.xml.sax.Attributes;

import org.xml.sax.SAXException;

import org.xml.sax.helpers.DefaultHandler;

import org.xmlpull.v1.XmlPullParser;

import org.xmlpull.v1.XmlPullParserException;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStream;

import java.io.InputStreamReader;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import javax.xml.parsers.DocumentBuilder;

import javax.xml.parsers.DocumentBuilderFactory;

import javax.xml.parsers.ParserConfigurationException;

import javax.xml.parsers.SAXParser;

import javax.xml.parsers.SAXParserFactory;

public class MainActivity extends AppCompatActivity {

private String cuurentTag = null;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

public void parseXML(View view){

new MyTask().execute();

}

class MyTask extends AsyncTask{

@Override
protected Object doInBackground(Object[] params) {
{
//01.获取网络XML数据
//原生态底层: URLConnection
try {
URL url = new URL("http://193.168.2.223:8080/persons.xml");
//打开连接
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
//设置请求方式
httpURLConnection.setRequestMethod("GET");
//设置请求连接超时时间(优化)
httpURLConnection.setConnectTimeout(5000);
//获取结果码(状态)  成功：200    未修改:304
int code = httpURLConnection.getResponseCode();
if(code==200){
//获取服务器返回过来的结果
InputStream is = httpURLConnection.getInputStream();

// //打印(读)

// BufferedReader br = new BufferedReader(new InputStreamReader(is));

// String str = null;

// while((str=br.readLine())!=null){

// Log.i(“test”,str);

// }

//解析XML

//01.DOM解析

// DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();

// DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();

// Document document = documentBuilder.parse(is);

// //获取根标签

// Element root = document.getDocumentElement();

// Log.i(“test”,”根标签为：”+root.getNodeName());

// //获取persons下面所有的子标签

// NodeList nodeList = root.getElementsByTagName(“person”);

// for (int i = 0; i < nodeList.getLength(); i++) {

// //获取单个

// Element personElement = (Element) nodeList.item(i);

// //获取属性ID的值

// String id = personElement.getAttribute(“id”);

// Log.i(“test”,id);

// //获取子标签的值

// Element nameElement = (Element) personElement.getElementsByTagName(“name”).item(0);

// String name = nameElement.getTextContent();

//

// Element ageElement = (Element) personElement.getElementsByTagName(“age”).item(0);

// String age = ageElement.getTextContent();

//

// Element sexElement = (Element) personElement.getElementsByTagName(“sex”).item(0);

// String sex = sexElement.getTextContent();

//

// Log.i(“test”,name+” “+age+” “+sex);

// }

//02.SAX解析(边读边解析,基于事件(方法)驱动的方式)

// SAXParserFactory saxParserFactory = SAXParserFactory.newInstance();

// SAXParser saxParser = saxParserFactory.newSAXParser();

// saxParser.parse(is,new DefaultHandler(){

// @Override

// public void startDocument() throws SAXException {

// super.startDocument();

// }

//

// @Override

// public void endDocument() throws SAXException {

// super.endDocument();

//

// }

//

// @Override

// public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {

// super.startElement(uri, localName, qName, attributes);

// cuurentTag=localName;

// //获取开始标签的名字

// if(“person”.equals(localName)){

// //获取属性的值

// String id = attributes.getValue(0);

// Log.i(“test”,id);

// }

// }

//

// @Override

// public void endElement(String uri, String localName, String qName) throws SAXException {

// super.endElement(uri, localName, qName);

// cuurentTag=null;

// }

//

// @Override

// public void characters(char[] ch, int start, int length) throws SAXException {

// super.characters(ch, start, length);

// if(“name”.equals(cuurentTag)){

// //获取的值

// String name = new String(ch,start,length);

// Log.i(“test”,” “+name);

// }else if(“age”.equals(cuurentTag)){

// //获取的值

// String age = new String(ch,start,length);

// Log.i(“test”,” “+age);

// }else if(“sex”.equals(cuurentTag)){

// //获取的值

// String sex = new String(ch,start,length);

// Log.i(“test”,” “+sex);

// }

// }

// });

//03.使用Pull解析(类似SAX)
XmlPullParser xmlPullParser = Xml.newPullParser();
xmlPullParser.setInput(is,"UTF-8");

//获取解析标签的类型
int type = xmlPullParser.getEventType();
while(type!=XmlPullParser.END_DOCUMENT){
switch (type){
case XmlPullParser.START_TAG:
//获取开始标签的名字
String startTagName = xmlPullParser.getName();
if("person".equals(startTagName)){
//获取ID的值
String id = xmlPullParser.getAttributeValue(0);
Log.i("test",id);
}else if ("name".equals(startTagName)){
//获取name的值
String name = xmlPullParser.nextText();
Log.i("test",name);
}else if ("sex".equals(startTagName)){
//获取sex的值

9f90
String sex = xmlPullParser.nextText();
Log.i("test",sex);
}
break;
case XmlPullParser.END_TAG:
break;
}
//细节：重新赋值，不然会造成死循环
type=xmlPullParser.next();

}

}
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (XmlPullParserException e) {
e.printStackTrace();
}

// catch (ParserConfigurationException e) {

// e.printStackTrace();

// } catch (SAXException e) {

// e.printStackTrace();

// }

// catch (ParserConfigurationException e) {

// e.printStackTrace();

// } catch (SAXException e) {

// e.printStackTrace();

// }

//03.展示
}
return null;
}

@Override
protected void onPostExecute(Object o) {
super.onPostExecute(o);
}

}

}

7.当然最后不要忘了在Manifests中配置网络权限哟

<!--配置网络权限-->
<uses-permission android:name="android.permission.INTERNET"></uses-permission>