java创建timestmp的几种方式

今天在java中Date类型直接转换为timestamp类型时出错。于是网上搜了一下，发现有以下几种转换方式：

[java]
Timestamp time1 = new Timestamp(System.currentTimeMillis());

Timestamp time2 = new Timestamp(new Date().getTime());

Timestamp time3 = new Timestamp(Calendar.getInstance().getTimeInMillis());

//不建议使用
Timestamp time4 = new Timestamp(2011-1900,11,11,11,11,11,0);

Timestamp time1 = new Timestamp(System.currentTimeMillis());

Timestamp time2 = new Timestamp(new Date().getTime());

Timestamp time3 = new Timestamp(Calendar.getInstance().getTimeInMillis());

//不建议使用
Timestamp time4 = new Timestamp(2011-1900,11,11,11,11,11,0);