Java日期与String转换等处理

红太狼 2022-07-14 14:57 146阅读 0赞

package com.zhh;  
  
  
import java.text.ParseException;  
import java.text.SimpleDateFormat;  
import java.util.Calendar;  
import java.util.Date;  
  
  
public class TestDate \{  
  
  
public static void main(String\[\] args) throws ParseException \{  
Calendar now = Calendar.getInstance();  
System.out.println("年: " + now.get(Calendar.YEAR));  
System.out.println("月: " + (now.get(Calendar.MONTH) + 1) + "");  
System.out.println("日: " + now.get(Calendar.DAY\_OF\_MONTH));  
System.out.println("时: " + now.get(Calendar.HOUR\_OF\_DAY));  
System.out.println("分: " + now.get(Calendar.MINUTE));  
System.out.println("秒: " + now.get(Calendar.SECOND));  
System.out.println("当前时间毫秒数：" + now.getTimeInMillis());  
System.out.println(now.getTime());  
System.out.println(getDateTime("2016-12-12 12:23:33"));  
System.out.println(date2String(new Date()));  
System.out.println(dateTime2String(new Date()));  
\}  
  
  
public static Date getDate(String str) \{  
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");  
Date today = null;  
try \{  
today = sdf.parse(str);  
\} catch (ParseException e) \{  
e.printStackTrace();  
\}  
return today;  
\}  
  
  
public static Date getDateTime(String str) \{  
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
Date today = null;  
try \{  
today = sdf.parse(str);  
\} catch (ParseException e) \{  
e.printStackTrace();  
\}  
return today;  
\}  
  
  
public static String date2String(Date date) \{  
String str = new SimpleDateFormat("yyyy-MM-dd").format(date);  
return str;  
\}  
  
  
public static String dateTime2String(Date date) \{  
String str = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(date);  
return str;  
\}  
\}