Java access to WebService methods that return XML data

This article illustrates a Java way to access a WebService to return XML data. Share with you for your reference. The details are as follows:

import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.PrintWriter;
import org.w3c.dom.Document;
import org.w3c.dom.DOMException;
import org.xml.sax.SAXException;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.parsers.ParserConfigurationException;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerConfigurationException;
import javax.xml.transform.TransformerException;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
/***
* @author xuechong
* 6/11/2010 16:58
* DomXMLString.java
*  Overview: pure java Mode access remote WebService Interface returned xml Data in the format is saved locally 
*/
public class DomXMLString{
private static String SERVICES_HOST = "www.webxml.com.cn";
//Remote WebService interface url
private static String NETDATA_URL = "http://webservice.webxml.com.cn/WebServices/WeatherWS.asmx/getRegionProvince";
//Access to the remote WebService interface returns xml-formatted data stored in the local absolute path
private static String LOCAL_PC_SAVEFILE_URL = "E:dataTest/netDataToLocalFile.xml";
private DomXMLString(){}
public static void main(String[] args) throws Exception{
Document document = getProvinceCode(NETDATA_URL);
helloOK(document, LOCAL_PC_SAVEFILE_URL);
}

public static Document getProvinceCode(String netXMLDataURL){
Document document = null;
DocumentBuilderFactory documentBF = DocumentBuilderFactory.newInstance();
documentBF.setNamespaceAware(true);
try{
DocumentBuilder documentB = documentBF.newDocumentBuilder();
InputStream inputStream = getSoapInputStream(netXMLDataURL);
//Specific webService
document = documentB.parse(inputStream);
inputStream.close();
}catch(DOMException e){
e.printStackTrace();
return null;
}catch(ParserConfigurationException e){
e.printStackTrace();
return null;
}catch (SAXException e){
e.printStackTrace();
return null;
}catch(IOException e){
e.printStackTrace();
return null;
}
return document;
}

public static InputStream getSoapInputStream(String url){
InputStream inputStream = null;
try{
URL urlObj = new URL(url);
URLConnection urlConn = urlObj.openConnection();
urlConn.setRequestProperty("Host", SERVICES_HOST);
//Specific webService
urlConn.connect();
inputStream = urlConn.getInputStream();
}catch(MalformedURLException e){
e.printStackTrace();
}catch(IOException e){
e.printStackTrace();
}
return inputStream;
}

public static void helloOK(Document document, String savaFileURL){
TransformerFactory transF = TransformerFactory.newInstance();
try{
Transformer transformer = transF.newTransformer();
DOMSource source = new DOMSource(document);
transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
transformer.setOutputProperty(OutputKeys.INDENT, "YES");
PrintWriter pw = new PrintWriter(new FileOutputStream(savaFileURL));
StreamResult result = new StreamResult(pw);
transformer.transform(source, result);
System.out.println(" generate xml File successfully !");
}catch(TransformerConfigurationException e){
System.out.println(e.getMessage());
}catch(IllegalArgumentException e){
System.out.println(e.getMessage());
}catch(FileNotFoundException e){
System.out.println(e.getMessage());
}catch(TransformerException e){
System.out.println(e.getMessage());
}
}
}

I hope this article has been helpful to your Java programming.