How to read XML response from a URL in java?

user_278587 0
Viewed 231645

I need to write a simple function that takes a URL and processes the response which is XML or JSON, I have checked the Sun website https://swingx-ws.dev.java.net/servlets/ProjectDocumentList , but the HttpRequest object is to be found nowhere, is it possible to do this in Java? I`m writting a rich client end app.

httprequest xml java
8 Answers

For xml parsing of an inputstream you can do:

// the SAX way:
XMLReader myReader = XMLReaderFactory.createXMLReader();
myReader.setContentHandler(handler);
myReader.parse(new InputSource(new URL(url).openStream()));

// or if you prefer DOM:
DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
DocumentBuilder db = dbf.newDocumentBuilder();
Document doc = db.parse(new URL(url).openStream());

But to communicate over http from server to client I prefer using hessian library or springs http invoker lib

user_1946090

Get your response via a regular http-request, using:

The next step is parsing it. Take a look at this article for a choice of parser.

user_2039070
user_706040

Ok I think I have solves the problem below is a working code

//
package xmlhttp;

import org.jdesktop.http.Response;

import org.jdesktop.http.Session;

import org.jdesktop.http.State;



public class GetXmlHttp{


    public static void main(String[] args) {

        getResponse();

    }

    public static void getResponse()
    {

        final Session session = new Session();

        try {
            String url="http://192.172.2.23:8080/geoserver/wfs?request=GetFeature&version=1.1.0&outputFormat=GML2&typeName=topp:networkcoverage,topp:tehsil&bbox=73.07846689124875,33.67929015631999,73.07946689124876,33.68029015632,EPSG:4326";
            final Response res=session.get(url);
            boolean notDone=true;
            do
            {
                System.out.print(session.getState().toString());

                if(session.getState()==State.DONE)
                {
                    String xml=res.toString();
                    System.out.println(xml);
                    notDone=false;


                }

            }while(notDone);

        } catch (Exception e1) {

            e1.printStackTrace();
        }


    }

}
user_2785870

This Code is to parse the XML wraps the JSON Response and display in the front end using ajax.

Required JavaScript code.
<script type="text/javascript">
$.ajax({
 method:"GET",
 url: "javatpoint.html", 
 
 success : function(data) { 
  
   var json=JSON.parse(data); 
   var tbody=$('tbody');
  for(var i in json){
   tbody.append('<tr><td>'+json[i].id+'</td>'+
     '<td>'+json[i].firstName+'</td>'+
     '<td>'+json[i].lastName+'</td>'+
     '<td>'+json[i].Download_DateTime+'</td>'+
     '<td>'+json[i].photo+'</td></tr>')
  }  
 },
 error : function () {
  alert('errorrrrr');
 }
  });
  
  </script>

[{ "id": "1", "firstName": "Tom", "lastName": "Cruise", "photo": "https://pbs.twimg.com/profile_images/735509975649378305/B81JwLT7.jpg" }, { "id": "2", "firstName": "Maria", "lastName": "Sharapova", "photo": "https://pbs.twimg.com/profile_images/3424509849/bfa1b9121afc39d1dcdb53cfc423bf12.jpeg" }, { "id": "3", "firstName": "James", "lastName": "Bond", "photo": "https://pbs.twimg.com/profile_images/664886718559076352/M00cOLrh.jpg" }] `

URL url=new URL("www.example.com"); 

        URLConnection si=url.openConnection();
        InputStream is=si.getInputStream();
        String str="";
        int i;
        while((i=is.read())!=-1){  
            str +=str.valueOf((char)i);
            }

        str =str.replace("</string>", "");
        str=str.replace("<?xml version=\"1.0\" encoding=\"utf-8\"?>", "");
        str = str.replace("<string xmlns=\"http://tempuri.org/\">", "");
        PrintWriter out=resp.getWriter();
        out.println(str);

`

user_78438090

do it with the following code: 

DocumentBuilderFactory builderFactory = DocumentBuilderFactory.newInstance();

    try {
        DocumentBuilder builder = builderFactory.newDocumentBuilder();
        Document doc = builder.parse("/home/codefelix/IdeaProjects/Gradle/src/main/resources/static/Employees.xml");
        NodeList namelist = (NodeList) doc.getElementById("1");

        for (int i = 0; i < namelist.getLength(); i++) {
            Node p = namelist.item(i);

            if (p.getNodeType() == Node.ELEMENT_NODE) {
                Element person = (Element) p;
                NodeList id = (NodeList) person.getElementsByTagName("Employee");
                NodeList nodeList = person.getChildNodes();
                List<EmployeeDto> employeeDtoList=new ArrayList();

                for (int j = 0; j < nodeList.getLength(); j++) {
                    Node n = nodeList.item(j);

                    if (n.getNodeType() == Node.ELEMENT_NODE) {
                        Element naame = (Element) n;
                        System.out.println("Employee" + id + ":" + naame.getTagName() + "=" +naame.getTextContent());
                    }
                }
            }
        }
    } catch (ParserConfigurationException e) {
        e.printStackTrace();
    } catch (SAXException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }
}

}

user_96157490
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