java 时间格式转换

// parse将字符串解析成Date 
String createDate = req.getParameter("createDate");
SimpleDateFormat sim = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
try {
      Date dates = sim.parse(createDate);
      post.setCreateDate(dates);
 
} catch (ParseException e) {
              e.printStackTrace();  //To change body of catch statement use File | Settings | File Templates.
} 

// format格式化代码,将data转化为String 
Date da=new Date();
SimpleDateFormat format=new SimpleDateFormat("yyyy年MM月dd日  HH:mm:ss");
String times=format.format(da);

// 获得分钟
String minute = new SimpleDateFormat("mm").format(new Date());