net.sf.json日付タイプフォーマット出力

もっと読む
Date、Timestamp
転載は[url]から
http://www.cnblogs.com/mjorcen/p/3780464.html[/url]
作成ツールクラス

package cn.jorcen.commons.util;

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

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

public class DateJsonValueProcessor implements JsonValueProcessor {
    /**
     *                  

     * G Era     Text AD 

     * y   Year 1996; 96 

     * M       Month July; Jul; 07 

     * w       Number 27 

     * W        Number 2 

     * D       Number 189 

     * d        Number 10 

     * F        Number 2 

     * E        Text Tuesday; Tue

     * a Am/pm    Text PM 

     * H        （0-23） Number 0 

     * k        （1-24） Number 24

     * K am/pm      （0-11） Number 0 

     * h am/pm      （1-12） Number 12 

     * m         Number 30 

     * s        Number 55 

     * S     Number 978 

     * z    General time zone Pacific Standard Time; PST; GMT-08:00 

     * Z    RFC 822 time zone -0800 

     */
    public static final String Default_DATE_PATTERN = "yyyy-MM-dd HH:mm:ss";
    private DateFormat dateFormat;

    public DateJsonValueProcessor(String datePattern) {
        try {
            dateFormat = new SimpleDateFormat(datePattern);
        } catch (Exception e) {
            dateFormat = new SimpleDateFormat(Default_DATE_PATTERN);
        }
    }

    public Object processArrayValue(Object value, JsonConfig jsonConfig) {
        return process(value);
    }

    public Object processObjectValue(String key, Object value,
            JsonConfig jsonConfig) {
        return process(value);
    }

    private Object process(Object value) {
        return dateFormat.format((Date) value);

    }
}

テストクラス:

/**
 * 
 */
package cn.jorcen.commons.util;

import java.sql.Timestamp;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;

import net.sf.json.JsonConfig;

import com.alibaba.fastjson.serializer.SerializerFeature;

/**
 * 
 *   Json  
 * 
 * @author mjorcen
 * @email [email protected]
 * @dateTime Jun 4, 2014 4:11:20 PM
 * @version 1
 */
public class FastJosnUtil {
    public static final String toJson(Object obj) {
        return toNetSFJson(obj);
    }

    private static String toNetSFJson(Object obj) {
        JsonConfig config = new JsonConfig();
        config.registerJsonValueProcessor(Date.class,
                new DateJsonValueProcessor("yyyy-MM-dd hh:mm:ss"));
        config.registerJsonValueProcessor(Timestamp.class,
                new DateJsonValueProcessor("yyyy-MM-dd hh:mm:ss"));
        String objStr = net.sf.json.JSONObject.fromObject(obj, config)
                .toString();
        return objStr;
    }

    public static final String toFastJson(Object obj) {
        String objStr = com.alibaba.fastjson.JSONObject.toJSONString(obj,
                SerializerFeature.WriteDateUseDateFormat,
                SerializerFeature.WriteMapNullValue);
        return objStr;
    }

    public static void main(String[] args) {
        Map map = new HashMap();
        map.put("time", new Date());
        map.put("name", "yy");
        map.put("age", 20);
        map.put("timestamp", new Timestamp(System.currentTimeMillis()));
        System.out.println(toJson(map));
    }
}

結果:

{"timestamp":"2014-06-10 05:54:11","time":"2014-06-10 05:54:11","age":20,"name":"yy"}