How to convert Date(ActionScript 3) to java.util.Date through a xml?

I want to convert Date(ActionScript 3) to java.util.Date through a xml.

First, write a user defined ActionScript class like this.

public class User
{
    public function User()
    {
        userDate = new Date();
    }

    public var id:String = null;
    public var password:String = null;
    public var userDate:Date = null;

}

Second, create its instance and set each of values, so it converts ActionScript class to a xml for using XMLEncoder having its schema file.

This is the result xml, and send this xml to a server for using a HTTPService.

<User>
  <id>system</id>
  <password>manager</password>
  <userDate>Fri Jan 14 09:02:17 GMT+0900 2011</userDate>
</User>

Finally, In server side of Java, I want to convert this xml to Java class like this for using JAXB Unmarshaller.

public class User {

    public User() {
    }

    private String id;
    private String password;
    private Date userDate;


    public void setId(String id) {
        this.id = id;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public void setUserDate(Date userDate) {
        this.userDate = userDate;
    }
    public String getId() {
        return id;
    }
    public String getPassword() {
        return password;
    }
    public Date getUserDate() {
        return userDate;
    }

}

But, as开发者_如何学JAVA a result, "UserDate" property is only going to be null...

Why "UserDate" property is null ? And, please tell me solutions if any.

The text representation of your Flash Date and java.util.Date are probably not compatible. Since both date objects are internally based on the number of milliseconds since January 1, 1970, I would recommend using date.time in AS3 to get the integer value of the date, sending it to Java, and then using date.setTime() to set the correct date.

You can use an XmlAdapter to accomplish this:

package example;

import java.text.SimpleDateFormat;
import java.util.Date;

import javax.xml.bind.annotation.adapters.XmlAdapter;

public class DateAdapter extends XmlAdapter<String, Date> {

    private SimpleDateFormat format = new SimpleDateFormat("EEE MMM d HH:mm:ss zZ yyyy");

    @Override
    public Date unmarshal(String v) throws Exception {
        System.out.println(format.parse(v));
        return format.parse(v);
    }

    @Override
    public String marshal(Date v) throws Exception {
        return format.format(v);
    }

}

Then specify this XmlAdapter on the userDate property on your User class:

package example;

import java.util.Date;    
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

@XmlRootElement(name="User")
public class User {

    private String id;
    private String password;
    private Date userDate;

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    @XmlJavaTypeAdapter(DateAdapter.class)
    public Date getUserDate() {
        return userDate;
    }

    public void setUserDate(Date userDate) {
        this.userDate = userDate;
    }

}

For more information on XmlAdapter see:

• http://bdoughan.blogspot.com/2010/07/xmladapter-jaxbs-secret-weapon.html
• http://bdoughan.blogspot.com/2010/12/jaxb-and-immutable-objects.html
• http://bdoughan.blogspot.com/2010/12/represent-string-values-as-element.html

UPDATE

Based on your comments, if you want to specify this as a package level annotation you need to include a class called package-info in the same package as your model classes. This class will look like:

@XmlJavaTypeAdapter(value=DateAdapter.class, type=Date.class)
package example;

import java.util.Date;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;

If you want an alternative means to specify JAXB metadata you could use the XML representation extension in EclipseLink JAXB (MOXy), I'm the tech lead:

• http://bdoughan.blogspot.com/2010/12/extending-jaxb-representing-annotations.html

Alternatively, you could ensure that the date that is passed to JAXB is in the following format (xsd:dateTime):

[-]CCYY-MM-DDThh:mm:ss[Z|(+|-)hh:mm]

You may just want to look into using BlazeDS to handle the job of conversion between AMF (serialized AS3) and serialized POJO.

I don't have a lot of experience with using JAXB to unmarshall but found this out on the interwebs.

The correct format for an XML Schema dateTime type is: yyyy-mm-ddThh:mm:ss

If you change your date to the following do you still see the error? 2006-02-01T08:00:00

You could use a DateFormatter if your in Flex otherwise you could make a getter on the AS3 side to return the appropriately formatted date. weltraumpirat's answer seems equally valid.