js和java得到当前日期和三十天以前日期

js:

//获取当前日期
var myDate = new Date();
var nowY = myDate.getFullYear();
var nowM = myDate.getMonth()+1;
var nowD = myDate.getDate();
var enddate = nowY+"-"+(nowM<10 ? "0" + nowM : nowM)+"-"+(nowD<10 ? "0"+ nowD : nowD);//当前日期

//获取三十天前日期
var lw = new Date(myDate - 1000 * 60 * 60 * 24 * 30);//最后一个数字30可改，30天的意思
var lastY = lw.getFullYear();
var lastM = lw.getMonth()+1;
var lastD = lw.getDate();
var startdate=lastY+"-"+(lastM<10 ? "0" + lastM : lastM)+"-"+(lastD<10 ? "0"+ lastD : lastD);//三十天之前日期

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java:

//获取当前日期
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
Date today = new Date();
String endDate = sdf.format(today);//当前日期

//获取三十天前日期
Calendar theCa = Calendar.getInstance();
theCa.setTime(today);
theCa.add(theCa.DATE, -30);//最后一个数字30可改，30天的意思
Date start = theCa.getTime();
String startDate = sdf.format(start);//三十天之前日期