java 字符串时间和毫秒数互转

package org.cric.e;

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

public class TimeDateText {

/**
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub

try {
/**
* 将字符串数据转化为毫秒数
*/
String dateTime="20121025112950";

Calendar c = Calendar.getInstance();

c.setTime(new SimpleDateFormat("yyyyMMddHHmmss").parse(dateTime));

System.out.println("时间转化后的毫秒数为："+c.getTimeInMillis());
/**
* 将毫秒数转化为时间
*/
String sstime="1339033320000";
Date date = new Date(sstime);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");

System.out.println("毫秒数转化后的时间为："+ sdf.format(date));
} catch (java.text.ParseException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}