使用Java中的合并算法将两个值合并为单个值

Question

Need help to perform merge two similar contact values. I would like to know how can i merge two similar contact values into a single contact before I convert it as a xml file using Java. In my case I have contacts like this:

Contact No1:
Contact
Arun
Arun_niit
nuraaa_iceee@yahoo.co.in
Contact
Contact No2:
Contact
Arun
Arun_niit
nuraaa_iceee@gmail.com
Contact

Contact No1&2 has same name and also the contact No 3&4

Contact No3:
Contact
Rangarajkarthik
karthik Rangaraj
kart26@gmail.com
karthikranga@yahoo.com
Contact


Contact No4:
Contact
Rangaraj
karthik 
kart26@gmail.com
karthikranga@yahoo.com
Contact

The above contact repeating twice with the same name and email address. How can I merge this as a single contact?

This is my .partf file and I want to convert this to an XML file which I did. But I want to merge these contacts and then create a XML using my JavaCode.

Contact
Arun
Arun_niit
nuraaa_iceee@yahoo.co.in
Contact
Contact
ColomboGiorgia
Giorgia Colombo
giorgiacolombo81239@libero.it
Contact
Contact
Arun
Arun_niit
nuraaa_iceee@gmail.com
Contact
Contact
KumarVeera
Veera Kumar
KUMARg_8111@yahoo.com
Contact
Contact
MarbellaFunkybuddha
Funkybuddha Marbella
http://www.facebook.com/profile.php?id=1123301493096451
Contact
Contact
Rangarajkarthik
karthik Rangaraj
kart2006@gmail.com
karthikrangaraj@yahoo.com
Contact
Contact
Rangaraj
karthik 
kart26@gmail.com
karthikranga@yahoo.com
Contact

My JavaCode:

package textparser;  
import java.io.BufferedReader;
  import java.io.FileOutputStream;
  import java.io.FileReader;
  import java.util.regex.Pattern;
  import org.xml.sax.ContentHandler;
  import java.io.Serializable;
  import com.sun.org.apache.xml.internal.serialize.OutputFormat;
  import com.sun.org.apache.xml.internal.serialize.XMLSerializer;
  import com.sun.xml.internal.bind.util.AttributesImpl;
  public class Item  {
  public static void main (String args[]) {
  Item.readWrite("D:/Demo/test.part","D:/Demo/juin202.xml");//Read XML and Save as a XML file.
  }

  public static void readWrite(String fromFile, String toFile)  
  {
try{
    Pattern p = Pattern.compile(".+@.+\\.[a-z]+");//A compiled representation of a regular expression. 
    BufferedReader in = new BufferedReader(new FileReader(fromFile));
    FileOutputStream fos = new FileOutputStream(toFile);
    OutputFormat of = new OutputFormat("XML","windows-1250",true);//Codepage Windows-1250 - Character Code Listing for Central Europe languages.
    of.setIndent(1);
    of.setIndenting(true);//JDOM API:This will set the indent String to use; this is usually a String of empty spaces.
    XMLSerializer serializer = new XMLSerializer(fos,of);
    ContentHandler hd = serializer.asContentHandler();//The Serializer interface is implemented by a serializer to enable users to: get an org.xml.sax.ContentHandler or a DOMSerializer to provide input to. 
    hd.startDocument();
    AttributesImpl atts = new AttributesImpl();//Construct a new, empty AttributesImpl object.
    hd.startElement("","","CONTACTS",atts);//To create root tag <Contacts>
    String line = null,tag;
    while ((line=in.readLine())!=null) {
        if(line.equals("Contact")){
            line=in.readLine();
            hd.startElement("","","CONTACT",atts);
            int i=0;
            while(!line.equals("Contact")){
                if(i==0)
                    tag="FirstName";
                else if(i==1)
                    tag="LastName";
                else{
                    if(p.matcher(line).matches())
                        tag="EMail";
                    else
                        tag="URL";
                }
                hd.startElement("","",tag,atts);
                hd.characters(line.toCharArray(),0,line.length());
                hd.endElement("","",tag);
                i++;
                line=in.readLine();
            }
            hd.endElement("","","CONTACT");
        }
    }
    hd.endElement("","","CONTACTS");
    hd.endDocument();
    fos.close();
    System.out.println("Work is done and check your file specified in the directory");
    in.close();
    }catch(Exception E){
        System.out.println("Cannot Generate XML!!!");
            }

        }
  }

Am I doing something wrong or is there any better way of doing this?

Answer 1

This seems simple, as you load your contacts compare the contact you are loading to what you have already loaded. If it is a duplicate, you don't really need to merge you just need to delete (or just stop loading) the duplicate contact.

Answer 2

I did not look into your code in detail, but I think you have a more general design problem. You should 1) read the file and store each of the different contacts in an Object, for now let's call it InputContact . 2) you must specify your rules for merging the contacts. 3) iterate over the list of InputContact s and perform the comparisons and build a new list of MergedContacts .