Several common time conversion methods in Java

How to get the time in java and convert it to a standard time format string, and create a time object with the time character

One, get the time string

I sum it up as three steps

Step 1: Get the current time

Step 2: Create a time format string and get the local time zone

Step 3: Use SimpleDateFormat to convert the time format The following shows some 内联代码片.

//获取现在时间
		Date date = new Date();
		System.out.println(date);
		//创建时间格式字符串
		String pattern = "yyyy-MM-dd HH:mm:ss";
		//获取当地时区
		Locale locale = Locale.getDefault();
		//利用SimpleDateFormat 进行时间格式的转换
		SimpleDateFormat sdf = new SimpleDateFormat(pattern,locale);
		String time = sdf.format(date);
		System.out.println(time);

Create time object

The first step: give the time string

Step 2: Create a time format string and get the local time zone

Step 3: Use SimpleDateFormat to convert the time format The following shows some 内联代码片.

Show some below 内联代码片.

//创建时间字符串
		String time = "2021-1-21 12:12:12";
		String parrte = "yyyy-MM-dd HH:mm:ss";
		Locale locale = Locale.getDefault();
		//利用SimpleDateFormat 进行时间转换
		SimpleDateFormat simpleDateFormat = new SimpleDateFormat(parrte,locale);
		//输出的时间 返回值为Date
		Date date = simpleDateFormat.parse(time);
		System.out.println(date);