日期类型和字符串相互转换

来源：互联网发布：如何举报学校网络垄断编辑：程序博客网时间：2024/04/28 15:40

1、“20161122092203”转换成“yyy-MM-dd HH:mm:ss"
2、“2016-11-22 09:22:03”转换成“yyyyMMddHHmmss"
3、“2016-11-25 9:22:22”转换成“date"

import java.text.ParseException;

import java.text.SimpleDateFormat;
import java.util.Date;

public class StringAndDate {

   public static void main(String[] args) {
       String time="2016-11-22 09:22:03";
       SimpleDateFormat formatter1=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       SimpleDateFormat formatter2=new SimpleDateFormat("yyyyMMddHHmmss");
       try {
           time=formatter2.format(formatter1.parse(time));
       } catch (ParseException e) {
           e.printStackTrace();
       }
       System.out.println(time);


       longToString();
       stringToDate();
   }

   public static void longToString(){
       String time="20161122092203";
       SimpleDateFormat formatter1=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       SimpleDateFormat formatter2=new SimpleDateFormat("yyyyMMddHHmmss");
       try {
           time=formatter1.format(formatter2.parse(time));
       } catch (ParseException e) {
           e.printStackTrace();
       }
       System.out.println(time);
   }

   public static void stringToDate(){
       String time="2016-11-25 9:22:22";
       Date date=null;
       SimpleDateFormat formatter=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
       try {
           date=formatter.parse(time);
       } catch (ParseException e) {
           e.printStackTrace();
       }
       System.out.println(date);
   }
}

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