一. Dom
二 .PULL
三.SAX
首先在main 文件夹中建一个assets文件夹
用来放你要解析的xml文件
代码如下：
···
package com.example.lenovo.mytest02;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Xml;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
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.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
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 {
Button bt1,bt2,bt3;
TextView tx;
InputStream is;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
init();
}
public void init(){
bt1 = (Button) findViewById(R.id.button);
bt1.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
//要解析的xml
is= getAssets().open("users.xml");
tx.setText("Dom:\n"+ parseXmlDom(is)+"");
} catch (Exception e) {
e.printStackTrace();
}
}
});
bt2 =(Button) findViewById(R.id.button2);
bt2.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
//要解析的xml
is= getAssets().open("users.xml");
tx.setText("PULL:\n"+ parseXMLPULL(is).toString());
} catch (Exception e) {
e.printStackTrace();
}
}
});
bt3 = (Button)findViewById(R.id.button3);
bt3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
try {
//要解析的xml
is= getAssets().open("users.xml");
tx.setText("SAX:\n"+ parseXMLBySAX(is).toString());
} catch (Exception e) {
e.printStackTrace();
}
}
});
tx = (TextView) findViewById(R.id.textView);
}
//DOM解析
public ArrayList> parseXmlDom(InputStream is) throws ParserConfigurationException {
ArrayList>alist=new ArrayList<>();
try {
//创建工厂
DocumentBuilderFactory dbf=DocumentBuilderFactory.newInstance();
//创建Builder类对象
DocumentBuilder db =dbf.newDocumentBuilder();
//创建文本对象
Document dom = db.parse(is);
//获取解析文档中的所有节点信息
Element root = dom.getDocumentElement();
//提取需要解析的标签
NodeList nodeList = root.getElementsByTagName("person");
for (int i = 0; i map = new HashMap<>();
map.put("id", et.getAttribute("id"));
//获取所有子节点
NodeList childList = et.getChildNodes();
for (int j = 0; j map = null;
public ArrayList> parseXMLPULL(InputStream is) {
ArrayList> alist = new ArrayList<>();
//创建解析工具
XmlPullParser pull = Xml.newPullParser();
//加载数据源
try {
pull.setInput(is, "UTF-8");
//边读边解析 文档开始 标签开始 标签结束 文档结束
//获取解析数据的第一个标签
int type = pull.getEventType();
while (type != XmlPullParser.END_DOCUMENT) {
switch (type) {
case XmlPullParser.START_DOCUMENT://文档开始
break;
case XmlPullParser.START_TAG://标签开始
if (pull.getName().equals("person")) {
map = new HashMap<>();
map.put("id", pull.getAttributeValue(0));
}
if (map != null) {
if (pull.getName().equals("name")) {
map.put("name", pull.nextText());
}
if (pull.getName().equals("age")) {
map.put("age", pull.nextText());
}
}
break;
case XmlPullParser.END_TAG://标签结束
if (pull.getName().equals("person")) {
alist.add(map);
}
break;
}
//pull解析 解析完一个标签后不会自动指向下一个标签 需要手动指向
pull.next();//指向下一个标签
type = pull.getEventType();
}
} catch (Exception e) {
e.printStackTrace();
}
return alist;
}
//SAX解析
public ArrayList> parseXMLBySAX(InputStream is) {
try {
//创建工厂类
SAXParserFactory spf = SAXParserFactory.newInstance();
//创建解析类
SAXParser sax = spf.newSAXParser();
//创建工具类
MyHandler handler = new MyHandler();
//解析工具和解析类结合
sax.parse(is,handler);
return handler.alist;
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
//Sax解析需要单独创建解析的工具类 特点跟Pull一样 采用事件驱动（边读边解析）
//效率高，可以解析大文档 区别于Pull的是Sax不能停止
class MyHandler extends DefaultHandler {
ArrayList> alist = new ArrayList<>();
HashMap map = null;
String tag = null;
@Override//文档开始
public void startDocument() throws SAXException {
}
@Override //解析开始标签 可以获取属性信息 不能获取正文信息
//参数2 解析到的标签名称 参数4 获取的属性信息
public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {
if (localName.equals("person")) {
map = new HashMap<>();
map.put("id", attributes.getValue(0));
}
tag = localName;
}
@Override//获取开始标签对应的正文信息
public void characters(char[] ch, int start, int length) throws SAXException {
//转换数据
String data = new String(ch,start,length);
if(map!=null && tag !=null){
if(tag.equals("name")){
map.put("name",data);
}
if(tag.equals("age")){
map.put("age",data);
}
}
}
@Override//标签结束
public void endElement(String uri, String localName, String qName) throws SAXException {
if(localName.equals("person")){
alist.add(map);
map = null;
}
tag = null;
}
@Override//文档结束
public void endDocument() throws SAXException {
}
}
}
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