XML 파싱하기

기상청의 xml파일을 다운받아서 파싱하는 코드이다.

(http://www.kma.go.kr/weather/forecast/mid-term-xml.jsp?stnId=109)

package test.day08.xmlparser;

import java.io.BufferedReader;

import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import android.app.Activity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.EditText;

public class MainActivity extends Activity {
    /** Called when the activity is first created. */
 
 //결과값을 출력할 EditText
 EditText editText;
 String xml; //다운로드된 xml문서
 
    @Override
    public void onCreate(Bundle savedInstanceState) {
     super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        editText = (EditText)findViewById(R.id.editText);
        
    }
    //버튼을 눌렀을때 실행되는 메소드 
    public void down(View v){
     StringBuffer sBuffer = new StringBuffer();
     try{
      String urlAddr = " http://www.kma.go.kr/weather/forecast/mid-term-xml.jsp?stnId=109 ";
      //String urlAddr = "http://naver.com";
      URL url = new URL(urlAddr);
      HttpURLConnection conn = (HttpURLConnection)url.openConnection();
      if(conn != null){
       conn.setConnectTimeout(20000);
       conn.setUseCaches(false);
       if(conn.getResponseCode()==HttpURLConnection.HTTP_OK){
        //서버에서 읽어오기 위한 스트림 객체
        InputStreamReader isr = new InputStreamReader(conn.getInputStream());
        //줄단위로 읽어오기 위해 BufferReader로 감싼다.
        BufferedReader br = new BufferedReader(isr);
        //반복문 돌면서읽어오기
        while(true){
         String line = br.readLine();
         if(line==null){
          break;
         }
         sBuffer.append(line);
        }
        br.close();
        conn.disconnect();
       }
      }
      //결과값 출력해보기
      //editText.setText(sBuffer.toString());
      xml = sBuffer.toString(); //결과값 변수에 담기
     }catch (Exception e) {
   // TODO: handle exception
      Log.e("다운로드 중 에러 발생",e.getMessage());
      
  }
     parse();
     
    }
    
    //xml파싱하는 메소드
    public void parse(){
     try{
      DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
      DocumentBuilder documentBuilder = factory.newDocumentBuilder();
      //xml을 InputStream형태로 변환
      InputStream is = new ByteArrayInputStream(xml.getBytes());
      //document와 element 는 w3c dom에 있는것을 임포트 한다.
      Document doc = documentBuilder.parse(is);
      Element element = doc.getDocumentElement();
      //읽어올 태그명 정하기
      NodeList items = element.getElementsByTagName("tmx");
      //읽어온 자료의 수
      int n = items.getLength();
      //자료를 누적시킬 stringBuffer 객체
      StringBuffer sBuffer = new StringBuffer();
      //반복문을 돌면서 모든 데이터 읽어오기
      for(int i=0 ; i < n ; i++){
       //읽어온 자료에서 알고 싶은 문자열의 인덱스 번호를 전달한다.
       Node item = items.item(i);
       Node text = item.getFirstChild();
       //해당 노드에서 문자열 읽어오기
       String itemValue = text.getNodeValue();
       sBuffer.append("최대온도:"+itemValue+"rn");
       
      }
      //읽어온 문자열 출력해보기
      editText.setText(sBuffer.toString());
      
     }catch (Exception e) {
   // TODO: handle exception
      Log.e("파싱 중 에러 발생", e.getMessage());
  }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >

    <Button android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="다운로드"
    android:onClick="down"  />
    <EditText android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:editable="false"
    android:id="@+id/editText"
    android:gravity="top"/>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="test.day08.xmlparser"
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />
 <uses-permission android:name="android.permission.INTERNET"/>
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>

    </application>
</manifest>