解析XML

小鱼儿 2022-06-11 01:10 296阅读 0赞

在tomcat的webapps下ROOT目录下创建xml文件，记得右键另存改编码方式为UTF-8

下面上代码：

xml部分：

<?xml version="1.0" encoding="utf-8"?>
    <LinearLayout
        xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent"
        android:layout_height="match_parent">
    
        <Button
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="获取网络XML数据"
            android:onClick="getXMLByNet"
            />
    
    </LinearLayout>

java部分：

package com.example.prase;
    
    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.xmlpull.v1.XmlPullParser;
    import org.xmlpull.v1.XmlPullParserException;
    
    import java.io.IOException;
    import java.io.InputStream;
    import java.net.HttpURLConnection;
    import java.net.MalformedURLException;
    import java.net.URL;
    
    public class MainActivity extends AppCompatActivity {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
        }
        public void getXMLByNet(View view){
            new MyTask().execute();
        }
        class MyTask extends AsyncTask{
            @Override
            protected Object doInBackground(Object[] params) {
                //获取网络XML数据
                String path="http://192.168.23.4:7788/students.xml";
                try {
                    URL url=new URL(path);
                    HttpURLConnection connection = (HttpURLConnection) url.openConnection();
                    //设置请求方式
                    connection.setRequestMethod("GET");
                    //设置请求超时的时间
                    connection.setConnectTimeout(5000);
                    //获取结果码
                    int code=connection.getResponseCode();
                    if(code==200){
                        //获取数据
                        InputStream is=connection.getInputStream();
                        int len=0;
                        byte[] buf=new  byte[1024];
                        StringBuffer stringBuffer=new StringBuffer();
                        while((len=is.read(buf))!=-1){
                            String s=new String(buf,0,len);
                            stringBuffer.append(s);
                        }
                        Log.i("test",stringBuffer.toString());
    
                        //解析xml
                       XmlPullParser pullParser= Xml.newPullParser();
                        try {
                            pullParser.setInput(is,"UTF-8");
                            int type=pullParser.getEventType();
                            while(type!=XmlPullParser.END_DOCUMENT){
                                switch (type) {
                                    case XmlPullParser.START_DOCUMENT:
                                        //获取开始标签的名字
                                        String startTagName=pullParser.getName();
                                        if("student".equals(startTagName)){
                                            //获取属性ID的值
                                            String sid = pullParser.getAttributeValue(0);
                                        }else if("sname".equals(startTagName)){
                                            String sname=pullParser.nextText();
                                        }else if("sage".equals(startTagName)){
                                            String sage=pullParser.nextText();
                                        }
                                        break;
                                    case XmlPullParser.END_TAG:
                                        break;
                                }
                                //细节：
                                type=pullParser.next();
                            }
                        } catch (XmlPullParserException e) {
                            e.printStackTrace();
                        }
    
                        is.close();
                    }
                } catch (MalformedURLException e) {
                    e.printStackTrace();
                } catch (IOException e) {
                    e.printStackTrace();
                }
                return null;
            }
    
            @Override
            protected void onPostExecute(Object o) {
                super.onPostExecute(o);
            }
        }
    }

还需要获取网络权限：

<?xml version="1.0" encoding="utf-8"?>
    <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.prase">
    
        <uses-permission android:name="android.permission.INTERNET"></uses-permission>
    
        <application android:allowBackup="true" android:icon="@mipmap/ic_launcher"
            android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round"
            android:supportsRtl="true" android:theme="@style/AppTheme">
            <activity android:name=".MainActivity">
                <intent-filter>
                    <action android:name="android.intent.action.MAIN" />
    
                    <category android:name="android.intent.category.LAUNCHER" />
                </intent-filter>
            </activity>
        </application>
    
    </manifest>