The Castor of today's Notes series

Notes
Recently, there is a certain interest in the conversion of Java objects and XML text, so we have a look at the relevant information online. Found the Castor.

and browsed the page http://www.jdon.com/idea/castor.htm, but found that the above code has some errors and omissions.

I wrote a simple code with eclipse as follows: (mainly refer to the content of the website mentioned above)

The program is read into the Page.xml file and then converted to a Java object. Then write the Java object in a different file.

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1.page.xml, the page to be converted into an object

<?xml version= "1.0" encoding= "UTF-8" >
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2.homepagecontent.java, a simple class that conforms to the JavaBean specification

Package tryforcastor;

public class Homepagecontent implements Java.io.Serializable {

Private static final long serialversionuid = 3689909565688657717L;

Private Integer ID;

private String name;

Private String NavLink; Private String icon;

Private String description;

Public homepagecontent () {}

Public Integer GetId () {return id; }

public void SetId (Integer id) {this.id = ID; }

Public String GetName () {return name; }

public void SetName (String name) {this.name = name;    Public String Getnavlink () {return navlink; }

public void Setnavlink (String navlink) {this.navlink = NavLink; }

Public String GetIcon () {return icon; }

public void SetIcon (String icon) {This.icon = icon; }

Public String GetDescription () {return description; }

public void SetDescription (String description) {this.description = description; }

}

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3.homepagecollection.java,

Package tryforcastor;

Import java.util.*;

public class Homepagecollection implements Java.io.Serializable {

Private static final long serialversionuid = 3545239128603309878L;

Private String SiteName;

Private List homepagecontents = new ArrayList ();

Public homepagecollection () {}

--Manipulate the List of Page objects public void addhomepagecontent (Homepagecontent homepagecontent) {Home    Pagecontents.add (homepagecontent); }

Public List gethomepagecontents () {return homepagecontents; }

--Manipulate the name of the Address Book Public String GetName () {return SiteName; }

public void SetName (String name) {this.    SiteName = name; }

}

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4.mapping.xml, mapping files, linking XML files to transformations and Java classes

<?xml version= "1.0" encoding= "UTF-8"? ><mapping> <description>a Map file for our new template System</description> <class name= "homepagecontent" >  <map-to xml= "Homepagecontent" />  <field name= "id" type= "integer" >   <bind-xml name= "id" node= "attribute"/ >  </field>  <field name= "Name" type= "string"/>  <field name= " NavLink "type=" string "/>  <field name=" icon "type=" string "/>  <field name=" Description "type=" string "/> </class> <class name=" Homepagecollection ">  < Map-to xml= "homepagecollection"/>  <field name= "name" type= "string" >   < Bind-xml name= "name" node= "attribute"/>  </field>  <field name= "Homepagecontents" Type= "Homepagecontent"    collection= "collection"/> </class></mappinG>

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5.trycastor.java, performing the transformation of the class

Package tryforcastor;

Import Java.io.filereader;import Java.io.filewriter;import java.util.*;

Import Org.exolab.castor.mapping.mapping;import Org.exolab.castor.xml.marshaller;import Org.exolab.castor.xml.Unmarshaller;

/** * @author HBM * */public class Trycastor {public Mapping Mapping;

Public String xmlfile;

public void Homepagehandle (String mapfile, String xmlfile) throws Exception {this.xmlfile = xmlfile;            try {mapping = new mapping (); Mapping.loadmapping (Mapfile);        Read into the mapping file} catch (Exception e) {throw new Exception (E.getmessage ()); }

}

--The data in Page.xml is read into homepagecollection public homepagecollection read () throws Exception {homepagecollection ho        Mepages = null; try {unmarshaller un = new Unmarshaller (homepagecollection.class);//XML-> Java private class Un.setmapp ing (mapping);

FileReader in = new FileReader (xmlfile); homepages = (homepagecollection) Un.unmarshal (in);        Convert In.close ();        catch (Exception e) {throw new Exception (E.getmessage ());    return homepages; }

HBM Add public FileWriter write (String outfile, Object obj) throws Exception {FileWriter out = new FileWrite        R (outfile);            try {Marshaller mar = new Marshaller (out);//java-> XML Private Class mar.setmapping (mapping);        Mar.marshal (obj);    catch (Exception e) {throw new Exception (E.getmessage ());//convert} return out; }

   /**     * @param args     */    Public static void Main (string[] args) {        trycastor tc = new Trycastor ();         try {            // Read the data from the Page.xml and put it in the object hcollection              TC. Homepagehandle ("Mapping.xml", "Page.xml");            Homepagecollection hcollection = Tc.read ();            List List = Hcollection.gethomepagecontents ();            for ( Iterator iter = List.iterator (); Iter.hasnext ();) {                Homepagecontent h = ( homepagecontent) Iter.next ();                 System.out.println (H.getdescription ());                 System.out.println ( H.geticon ());                System.out.println (H.getname ());                 System.out.println (H.getnavlink ());                 System.out.println (H.getname2 ());                 System.out.println (H.getid ());                 System.out.println (H.getclass ());                 System.out.println ("++++++++++++ +++++++++++ ");            }                        /write to XML text              FileWriter fw = Tc.write ("D.xml", Hcollection);             if (null!= FW) {                 fw.close ();            }

catch (Exception e) {e.printstacktrace (); }

}

}



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Summary: Think write mapping file (mapping.xml) is very troublesome, can you use mapping to solve the automatic lookup class fields to implement Java to XML conversion?