JAVA - Unix time stamp to time

Unix 时间戳转换：

/* 
     * Unix time stamp to time
     */
    public static String TimeStamp2Date(String timestampString){  
	    Long timestamp = Long.parseLong(timestampString)*1000;  
	    String date = new java.text.SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(new java.util.Date(timestamp));  
	    return date;  
	} 

一般的时间戳转换：

/* 
     * time stamp to time
     */
    public static String stampToDate(String s){
        String res;
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        long lt = new Long(s);
        Date date = new Date(lt);
        res = simpleDateFormat.format(date);
        return res;
    }

输出：

public static void main(String[] args) throws UnknownHostException {
	System.out.println("time : "+stampToDate("1541645357"));
	System.out.println("Unix : "+TimeStamp2Date("1541645357"));
}

outprint：
time : 1970-01-19 04:14:05
Unix : 2018-11-08 10:49:17