JavaSE基础_专题_日期处理

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本文详细介绍了Java中日期时间的处理与格式化方法，包括使用SimpleDateFormat、Timestamp等类进行日期时间的解析、格式化及时间戳操作。

package test4;

import java.sql.Timestamp;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.TimeZone;

public class test1 {

	public static void main(String[] args) throws ParseException {
		// TODO Auto-generated method stub
		/*
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");       
		Timestamp now = new Timestamp(System.currentTimeMillis());     
		String str = df.format(now);   
		System.out.println(str);
		*/
		 DateFormat format = new SimpleDateFormat("yyyyMMddHHmm");
		  Date dDate = format.parse("200911120000");  
		  DateFormat format2 = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
		  String reTime = format2.format(dDate);
		  System.out.println(reTime);
	    
		  System.out.println(System.currentTimeMillis());
		  Date d =new Date();
		  Calendar c = Calendar.getInstance();
		  String s = "1970-12-30 08:24:37.0";
		  Timestamp ts = Timestamp.valueOf(s);
		  System.out.println(ts);
		  Calendar cJapan =new  GregorianCalendar( TimeZone.getTimeZone("Japan") );
		  System.out.println( cJapan.get(Calendar.HOUR_OF_DAY) );
		  for(String str:TimeZone.getAvailableIDs())
			  System.out.println(str);
	}

}

test

package Test1;

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

public class Test7 {

	/**
	 * @param args
	 * @throws ParseException 
	 */
	public static void main(String[] args) throws ParseException {
		// TODO Auto-generated method stub
      long time = System.currentTimeMillis();
      System.out.println(time);
      Date date1 = new Date(time);
      Date date2 = new Date();
      System.out.println(date1.getTime() + " " +date2);
      System.out.println(date1.after(date2));
      DateFormat df = DateFormat.getDateInstance(DateFormat.SHORT);
      //df =  df.getDateTimeInstance();
      String s1 =  df.format(date2);
      System.out.println(s1);
      String str_date = "2012年2月4日";
      str_date = "2012--2--4";
      DateFormat df2 = DateFormat.getDateInstance(DateFormat.LONG);
      df2 = new SimpleDateFormat("yyyy--MM--dd");
      Date d2 = df2.parse(str_date);
      System.out.println(d2);

     Calendar c =Calendar.getInstance();
    c.set(2015, 5, 22);
    c.add(Calendar.MONTH, 1);
    System.out.println(c.get(Calendar.DAY_OF_MONTH )+ ":"+c.get(Calendar.YEAR )+ ":"+(c.get(Calendar.MONDAY )+1) );
  }

}