Android(安卓)SAX解析xml为java

主类:

package com.example.day12saxjiexi;import android.content.res.AssetManager;import android.os.Bundle;import android.support.v7.app.AppCompatActivity;import android.view.View;import android.widget.Button;import android.widget.TextView;import android.widget.Toast;import org.xml.sax.InputSource;import org.xml.sax.SAXException;import org.xml.sax.XMLReader;import java.io.IOException;import java.io.InputStream;import java.io.StringReader;import javax.xml.parsers.ParserConfigurationException;import javax.xml.parsers.SAXParser;import javax.xml.parsers.SAXParserFactory;//import okhttp3.Call;//import okhttp3.Callback;//import okhttp3.OkHttpClient;//import okhttp3.Request;//import okhttp3.Response;//import okhttp3.ResponseBody;public class MainActivity extends AppCompatActivity implements View.OnClickListener {    private Button downLoad;    private TextView showXMLcontent;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        initView();    }    private void initView() {        downLoad = (Button) findViewById(R.id.downLoad);        showXMLcontent = (TextView) findViewById(R.id.showXMLcontent);        downLoad.setOnClickListener(this);    }    @Override    public void onClick(View v) {        switch (v.getId()) {            case R.id.downLoad:                okhttpjiexi();                break;        }    }    private void okhttpjiexi() {//        OkHttpClient okHttpClient = new OkHttpClient();//          个人服务器没开启,无法使用//        final Request request = new Request.Builder().get().url("http://169.254.35.202:9527/1604A/app.xml").build();//请求获取到网络的资源//        //回调的方法//        okHttpClient.newCall(request).enqueue(new Callback() {//            @Override//            public void onFailure(Call call, IOException e) {//                Toast.makeText(MainActivity.this, "coming", Toast.LENGTH_SHORT).show();////            }////            @Override//            public void onResponse(Call call, Response response) throws IOException {//                //response相当于获取到的资源//                ResponseBody body = response.body();//                byte[] bytes = body.bytes();//资源的byte类型//                String result = new String(bytes);//获取资源string类型        parseXMLWithSAX();//            }//        });    }    private void parseXMLWithSAX() {        //SAX解析        SAXParserFactory factory = SAXParserFactory.newInstance();//创建一个解析SAX工厂类        try {            SAXParser saxParser = factory.newSAXParser();            XMLReader xmlReader = saxParser.getXMLReader();            //主要的            MySaxHanler handler = new MySaxHanler();            xmlReader.setContentHandler(handler);            //获取到资源类            AssetManager assets = getAssets();            InputStream is = assets.open("app.xml");            //开始执行解析            xmlReader.parse(new InputSource(is));        } catch (ParserConfigurationException e) {            e.printStackTrace();        } catch (SAXException e) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }}

MySaxHanler类:

package com.example.day12saxjiexi;import android.util.Log;import org.xml.sax.Attributes;import org.xml.sax.SAXException;import org.xml.sax.helpers.DefaultHandler;//继承一个DefaultHanderpublic class MySaxHanler extends DefaultHandler {    private String nodeName;    private StringBuilder id;    private StringBuilder name;    private StringBuilder version;    public MySaxHanler() {        super();    }    //初始化    @Override    public void startDocument() throws SAXException {        super.startDocument();        id = new StringBuilder();        name = new StringBuilder();        version = new StringBuilder();    }    @Override    public void endDocument() throws SAXException {        super.endDocument();    }    //在开始解析某个节点的时候被掉用    @Override    public void startElement(String uri, String localName, String qName, Attributes attributes) throws SAXException {        super.startElement(uri, localName, qName, attributes);        nodeName = localName;    }    //在结束解析某个节点的时候被掉用    @Override    public void endElement(String uri, String localName, String qName) throws SAXException {        super.endElement(uri, localName, qName);        if ("app".equals(localName)) {            Log.e("hh", String.valueOf(id));            Log.e("hh", String.valueOf(name));            Log.e("hh", String.valueOf(version));            id.setLength(0);            name.setLength(0);            version.setLength(0);        }    }    //在获取到节点中的内容的时候被调用    @Override    public void characters(char[] ch, int start, int length) throws SAXException {        super.characters(ch, start, length);        if ("id".equals(nodeName)) {            id.append(ch, start, length);        } else if ("name".equals(nodeName)) {            name.append(ch, start, length);        } else if ("version".equals(nodeName)) {            version.append(ch, start, length);        }    }}

app.xml:

<?xml version="1.0" encoding="utf-8"?>            1        jim        河北                2        anna        北京                3        tom        天津

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