用json时的一个问题

假设有一个Person类,

public class Person{   
   private java.util.Date birthday;   

   // settor and gettor methods.....   
}  

现在客户端那边传来如下的json规则的字符串String personJson = "{birthday:\"06/28/2008 17:00:00\"}",要用
JSONOjbect.toBean(JSONObject.from(personJson ),Person.class)方法来获得相应的Person实例时就出问题了,报错如下:

[align=center]2008-6-19 13:57:39 net.sf.json.JSONObject morphPropertyValue   
警告: Can't transform property 'birthday' from java.lang.String into java.util.Date. Will register a default Morpher   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
信息: Property 'java.util.Date.class' has no write method. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
警告: Property 'java.lang.String.date' does not exist. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
信息: Property 'java.util.Date.day' has no write method. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
警告: Property 'java.lang.String.hours' does not exist. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
警告: Property 'java.lang.String.minutes' does not exist. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
警告: Property 'java.lang.String.month' does not exist. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
警告: Property 'java.lang.String.seconds' does not exist. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
警告: Property 'java.lang.String.time' does not exist. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
信息: Property 'java.util.Date.timezoneOffset' has no write method. SKIPPED.   
2008-6-19 13:57:39 net.sf.ezmorph.bean.BeanMorpher morph   
警告: Property 'java.lang.String.year' does not exist. SKIPPED.   
Person's brithday: Thu Jun 19 13:57:39 CST 2008  
  [/align]

注意这里虽然有"Person's brithday: Thu Jun 19 13:57:39 CST 2008 "这样输出,但它的时间值与输入不符.

这个怎么解决?

以下是我做实验用的Java代码:
=======================

package json;   

import java.util.Date;   

import net.sf.json.JSONObject;   

public class Person {   
    private Date birthday;   

    public Date getBirthday() {   
        return birthday;   
    }   

    public void setBirthday(Date birthday) {   
        this.birthday = birthday;   
    }   

    public static Person getInstance(String jsonVale) {   
        return (Person)JSONObject.toBean(JSONObject.fromObject(jsonVale),Person.class);   
    }   

    public static void main(String[] args) {   
        String personJson = "{birthday:\"06/28/2008 17:00:00\"}";   

        Person p = getInstance(personJson);   

        System.out.println("Person's brithday: "+ p.getBirthday());   
    }   
}  


====
所需Jar包见附件.