如何在android中以“YYYY-MM-DD”格式获取Date对象

I have a requirement that I need to compare two Dates. One Date will come from DB which is String in "YYYY-DD-MM" firm and I need to compare this String Date with current Date.

我要求我需要比较两个日期。一个日期将来自DB，它是“YYYY-DD-MM”公司中的字符串，我需要将此字符串日期与当前日期进行比较。

for this I am converting Date String into Date object.

为此我将Date String转换为Date对象。

Now I need current Date also in "YYYY-MM-DD" format and it should be Date object so that I can use.compareTo() method compare two dates..

现在我还需要“YYYY-MM-DD”格式的当前日期，它应该是Date对象，这样我可以使用.compareTo（）方法比较两个日期..

Please help me how to do that...

请帮我怎么做......

5 个解决方案

#1

 Date cDate = new Date();
 String fDate = new SimpleDateFormat("yyyy-MM-dd").format(cDate);

#2

Calendar c = Calendar.getInstance();
SimpleDateFormat tf = new SimpleDateFormat("yyyy-MM-dd");
String time=DB time;
Date parseTime= tf.parse(time);
Integer dayNow=c.getTime().getDate();
Integer dayDb=parseTime.getDate();

then you can compare dayNow and dayDb.

那么你可以比较dayNow和dayDb。

#3

If your current date is actually an instance of the java.util.Date class, you don't need to specify a format for it; it's just a millisecond value that represents a specific moment in time.

如果您当前的日期实际上是java.util.Date类的实例，则无需为其指定格式;它只是一个毫秒值，代表一个特定的时刻。

You can get the current date like so:

您可以像这样获取当前日期：

Date currentDate = new Date();

#4

You can use 2 ways:

您可以使用以下两种方式：

DateFormat object. Use parse method.

DateFormat对象。使用解析方法。
Make your own parser of the Date. I mean, you convert the year, month and day in an integer each, and use Date constructor to get the Date.

制作自己的Date解析器。我的意思是，您将年，月和日转换为每个整数，并使用Date构造函数来获取日期。

#5

You can do it in following way

你可以通过以下方式完成

// pick current system date

    Date dt = new Date();

// set format for date

   SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

 // parse it like

        String check = dateFormat.format(dt);


        System.out.println("DATE TO FROM DATEBASE   " + 
                arrayOfStringDate[d].toString());
        System.out.println("CURRENT DATE   " + check);

// and compare like

//并比较喜欢

System.out.println("compare    "+ 
        arrayOfStringDate[d].toString().equals(check));

#1

 Date cDate = new Date();
 String fDate = new SimpleDateFormat("yyyy-MM-dd").format(cDate);

#2

Calendar c = Calendar.getInstance();
SimpleDateFormat tf = new SimpleDateFormat("yyyy-MM-dd");
String time=DB time;
Date parseTime= tf.parse(time);
Integer dayNow=c.getTime().getDate();
Integer dayDb=parseTime.getDate();