Date格式转换成json

package com.hisunsray.gw.dao.impl;

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Locale;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import net.sf.json.JsonConfig;
import net.sf.json.processors.JsonValueProcessor;


public class JsonDateValueProcessor implements JsonValueProcessor {   
	  
    private String format ="yyyy-MM-dd";   
       
    public Object processArrayValue(Object value, JsonConfig config) {   
        return process(value);   
    }   
  
    public Object processObjectValue(String key, Object value, JsonConfig config) {   
        return process(value);   
    }   
       
    private Object process(Object value){   
           
        if(value instanceof Date){   
            SimpleDateFormat sdf = new SimpleDateFormat(format,Locale.UK);   
            return sdf.format(value);   
        }   
        return value == null ? "" : value.toString();   
    }   
    public static void main(String[] args) {
//        List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
//        Map<String, Object> s1 = new HashMap<String, Object>();
//        s1.put("name", "jim");
//        s1.put("age", "15");
//        s1.put("time", new Date());
//        list.add(s1);
//        Map<String, Object> s2 = new HashMap<String, Object>();
//        s2.put("name", "lucy");
//        s2.put("age", "12");
//        s2.put("time", new Date());
//        list.add(s2);
    	List list =new ArrayList();
    	list.add("11");
    	list.add(new Date());
    	System.out.println(list);
        JsonConfig jsonConfig = new JsonConfig();
        jsonConfig.registerJsonValueProcessor(Date.class , new JsonDateValueProcessor());
        JSONArray jo = JSONArray.fromObject(list, jsonConfig);
        JSONObject jo2=new JSONObject();
        jo2.put("11", jo);
        System.out.println("json:" + jo2);
    }
}