API for converting a Java object into XML?

Do you know of any Java API that I could use to convert a Java
object into its equivalent XML representation?
For example if I have a class called "Foo" with variables va, vb
and I have an instance of Foo with va having the value 1 and vb
having the value 2, I would like be able to generate the
following XML fragment:
<Foo>
<va>1</va>
<vb>2</vb>
</Foo>
Thanks,
-- Rob
null

Rob Tan (guest) wrote:
: Do you know of any Java API that I could use to convert a Java
: object into its equivalent XML representation?
: For example if I have a class called "Foo" with variables va,
vb
: and I have an instance of Foo with va having the value 1 and
vb
: having the value 2, I would like be able to generate the
: following XML fragment:
: <Foo>
: <va>1</va>
: <vb>2</vb>
: </Foo>
: Thanks,
: -- Rob
There is none that I know of.
Oracle XML Team
http://technet.oracle.com
Oracle Technology Network
null

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How to convert Java Objects into xml?

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really need your help guys.
thanks in advance.

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And don't be so demanding.

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How can I use XStream to persist complicated Java Object to XML & backward

Dear Sir:
I met a problem as demo in my code below when i use XTream to persist my Java Object;
How can I use XStream to persist complicated Java Object to XML & backward??
See
[1] main code
import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.DomDriver;
public class PhoneList {
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     ArrayList<Person> person;
     private PhoneList myphonelist ;
     private LocationTest location;
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     person = new ArrayList<Person>();
     public ArrayList<PhoneNumber> getphones() {
          return phones;
     public ArrayList<Person> getperson() {
          return person;
     public void addPhoneNumber(PhoneNumber b1) {
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     public void removePhoneNumber(PhoneNumber b1) {
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     public void addPerson(Person p1) {
          this.person.add(p1);
     public void removePerson(Person p1) {
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          new PhoneList();
}[2].
import java.io.Serializable;
import javax.swing.JFrame;
public class PhoneNumber implements Serializable{
       private      String      phone;
       private      String      fax;
       private      int      code;
       private      String      number;
       private      String      address;
       private      String      school;
       private      LocationTest      location;
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          this.phone = phone;
     public String getPhone() {
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     public String getFax() {
          return fax;
     public void setCode(int code) {
          this.code = code;
     public int getCode() {
          return code;
     public void setNumber(String number) {
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     public String getNumber() {
          return number;
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        f.setLocation(200,200);
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     }[3].
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import java.io.Serializable;
public class Person implements Serializable{
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     private PhoneNumber      phone;
       @SuppressWarnings("unused")
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            fullname=fname;
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          fax = phoneNumber;
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          return phone ;
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          return fax;
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        return fullname ;
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        this.fullname      = name;
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        return getName();
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package test.temp;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import javax.swing.*;
import javax.swing.event.*;
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    Line2D.Double    line;
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        Point2D.Double p2 = new Point2D.Double();
        p2.x = pivot.getX() + lineLength*Math.cos(theta);
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        // find angle from pivot to ball center relative to line
        // ie, ball center -> pivot -> line end
        double cx = ball.getCenterX();
        double cy = ball.getCenterY();
        double pivotToCenter = pivot.distance(cx, cy);
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        double dy = cy - pivot.getY();
        double dx = cx - pivot.getX();
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        double phi = Math.atan2(dy, dx) - lastTheta;
        // rotate ball from pivot
        double x = pivot.getX() + pivotToCenter*Math.cos(theta+phi);
        double y = pivot.getY() + pivotToCenter*Math.sin(theta+phi);
        ball.setFrameFromCenter(x, y, x+ball.width/2, y+ball.height/2);
        lastTheta = theta; // save theta for next time
    private void moveBall(int distance)
        Point2D pivot = line.getP1();
        // ball touches line at distance from pivot
        double contactX = pivot.getX() + distance*Math.cos(lastTheta);
        double contactY = pivot.getY() + distance*Math.sin(lastTheta);
        // find new center location of ball
        // angle lambda = lastTheta - 90 degrees (anti-clockwise)
        double lambda = lastTheta - Math.PI/2;
        double x = contactX + (ball.width/2)*Math.cos(lambda);
        double y = contactY + (ball.height/2)*Math.sin(lambda);
        ball.setFrameFromCenter(x, y, x+ball.width/2, y+ball.height/2);
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        JSlider rotate = getSlider("rotation angle", "rotation", -90, 0, 0, 5, 15);
        translate = getSlider("distance from end", "translate", 0, 100, 100,25, 50);
        JPanel panel = new JPanel(new GridLayout(0,1));
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        panel.add(translate);
        return panel;
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        JSlider slider = new JSlider(JSlider.HORIZONTAL, min, max, value);
        slider.setBorder(BorderFactory.createTitledBorder(title));
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        slider.setMinorTickSpacing(minorSpace);
        slider.setMajorTickSpacing(majorSpace);
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}OK, My questions are:
[1]. what I generated XML by XSTream is very complicated, especially for object LocationTest, Can we make it as simple as others such as Person object??
[2]. after I run it, LocationTest will popup and a red ball in a panel will dsiplay, after I change red ball's position, I hope to persist it to xml, then when I read it back, I hope to get same picture, ie, red ball stiil in old position, How to do that??
Thanks a lot!!

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Thanks
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2. DOM-JAXP
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Thanks.

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Typical code snipped
XStream xStream = new XStream();
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1. SAX-JAXP
Can be used for XML -> Java Objects, but you have to write significant amounts of ugly, high maintainenance code
2. DOM-JAXP
Slower and more memory intensive than SAX because you need to read the whole object into memory first. Just as ugly and high maintenance.
3. JAXB
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