获取时间

    1\
    Calendar c=Calendar.getInstance();

    c.get(Calendar.YEAR)+"/"+(c.get(Calendar.MONTH)+1);//2017/12



    2\
    SimpleDateFormat dateFormat=null;
    Date date = null;
    dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    try {
        date=dateFormat.parse("2017-12-12 13:12:00");
    }catch(Exception e){

    }
    System.out.println("date:"+date);//Tue Dec 12 13:12:00 CST 2017


    3\
    //24小时制
    SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    //12小时制
    SimpleDateFormat sdf1 = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");
    String date1 = "2017-04-23 16:45:12";

    try {
        sdf.parse(date1);
        System.out.println(sdf.format(sdf.parse(date1))); //2017-04-23 16:45:12
        System.out.println(sdf1.format(sdf.parse(date1))); //2017-04-23 04:45:12
    } catch (Exception e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
    }

4\
var d = new Date();
var mm = d.getMonth()+1;
mm = mm<10?”0”+mm:mm;
var yyyymm = d.getFullYear() + “/” + mm;//2017/12

5\
获取当前的日期时间 格式“yyyy-MM-dd HH:MM:SS”

function getNowFormatDate() {
var date = new Date();
var seperator1 = “-“;
var seperator2 = “:”;
var month = date.getMonth() + 1;
var strDate = date.getDate();
if (month >= 1 && month <= 9) {
month = “0” + month;
}
if (strDate >= 0 && strDate <= 9) {
strDate = “0” + strDate;
}
var currentdate = date.getFullYear() + seperator1 + month + seperator1 + strDate
+ ” ” + date.getHours() + seperator2 + date.getMinutes()
+ seperator2 + date.getSeconds();
return currentdate;
}