public class T01Date { 
  public static void main(String[] args) { 
    //getTime():返回的時(shí)間是距離1970年的毫秒數(shù).值不受setTime()的影響 
    //date值受setTime()的影響 
    Date date=new Date(); 
    long current=date.getTime(); 
    System.out.println(current);//1472002479966 
    System.out.println(date);//Wed Aug 24 09:34:39 CST 2016 
    long time=current+1000*60*60*24;//時(shí)間設(shè)置為明日此時(shí) 
    date.setTime(time); 
    System.out.println(date.getTime());//1472002479966 
    System.out.println(current);//1472002479966 
    System.out.println(date);// Thu Aug 25 09:34:39 CST 2016 
  } 
} 

/** 
 * java.text.SimpleDateFormat 
 * 該類可以根據(jù)一個(gè)指定的日期格式將Date于String 
 * 之間相互轉(zhuǎn)換 
 * @author zc 
 * 
 */ 
public class T02SimpleDateFormat { 
  public static void main(String[] args) throws ParseException { 
    Date now =new Date(); 
    //2016-08-12 09:55:23 
    //yyyy-MM-dd hh:ss:mm 
    SimpleDateFormat sdf=new SimpleDateFormat("yyyy年MM月dd日 hh時(shí)ss分mm秒"); 
    String str = sdf.format(now); 
    System.out.println(str); 
    //a 居然能區(qū)分上下午漢字 
    String strDate="2012年12月20日下午12點(diǎn)20分30秒"; 
    SimpleDateFormat sdf2=new SimpleDateFormat("yyyy年MM月dd日ahh點(diǎn)ss分mm秒"); 
    Date date=sdf2.parse(strDate); 
    System.out.println(date); 
  } 
} 

  //默認(rèn)創(chuàng)建出來的Calendar的實(shí)現(xiàn)類表示當(dāng)前系統(tǒng)時(shí)間 
    Calendar c=Calendar.getInstance(); 
    //將Calendar轉(zhuǎn)換為Date 
    Date date=c.getTime(); 
    //Date->Calendar 
    /* 
     * void setTime(Date date) 
     * 該方法可以使當(dāng)前Calendar表示給定的 
     * Date所表示的時(shí)間 
     * */ 
    c.setTime(date); 
  } 
} 

import java.util.Calendar; 
/** 
 * Calendar提供了獲取各個(gè)時(shí)間分量的值的方法 
 * @author zc 
 */ 
public class T05Calendar2 { 
  public static void main(String[] args) { 
    Calendar c=Calendar.getInstance(); 
    //獲取年 
    int year=c.get(Calendar.YEAR); 
    System.out.println("year:"+year);//2016 
    //獲取月:月從0開始!!!,0表示一月 
    int month=c.get(Calendar.MONTH); 
    System.out.println("month:"+month);//7 
    /* 
     * 和天相關(guān)的時(shí)間分量 
     * DATE,DAY_OF_MONTH:是一致的,表示月中的第幾天 
     * DAY_OF_YEAR:表示年中的天 
     * DAY_OF_WEEK:表示周中的天 
     * 
     * */ 
    System.out.println(c.get(Calendar.DATE)); 
    System.out.println(c.get(Calendar.DAY_OF_MONTH)); 
    System.out.println(c.get(Calendar.DAY_OF_YEAR)); 
    System.out.println(c.get(Calendar.DAY_OF_WEEK)); 
    int dow=c.get(Calendar.DAY_OF_WEEK)-1; 
    String[] data={"日","一","二","三","四","五","六"}; 
    System.out.println("周"+data[dow]); 
    //獲取小時(shí),分鐘,秒   HOUR_OF_DAY:24小時(shí)  HOUR:12小時(shí)  
    System.out.println(c.get(Calendar.HOUR_OF_DAY));//14 
    System.out.println(c.get(Calendar.HOUR));//2 
    System.out.println(c.get(Calendar.MINUTE)); 
    System.out.println(c.get(Calendar.SECOND)); 
  } 
} 

/** 
 * 設(shè)置時(shí)間分量 
 * @author zc 
 * 
 */ 
public class T06Calendar3 { 
  public static void main(String[] args){ 
    //表示2008-08-08 20:08:08 
    //設(shè)置年 
    Calendar c=Calendar.getInstance(); 
    c.set(Calendar.YEAR,2008); 
    //設(shè)置月,月從0開始 
    c.set(Calendar.MONTH,Calendar.AUGUST); 
    //設(shè)置日 
    c.set(Calendar.DATE, 8); 
    //設(shè)置時(shí) 
    c.set(Calendar.HOUR_OF_DAY,20); 
    //設(shè)置分 
    c.set(Calendar.SECOND,8); 
    //設(shè)置秒 
    c.set(Calendar.MINUTE,8); 
    System.out.println(c.getTime()); 
    //！?。≡O(shè)置的時(shí)間分量超出后,會(huì)自行進(jìn)位 
  } 
} 

/** 
 * 獲取某個(gè)時(shí)間分量所允許的最大值 
 * @author zc 
 */ 
public class T07Calendar4 { 
  public static void main(String[] args) { 
    Calendar c=Calendar.getInstance(); 
    //查看當(dāng)月共多少天 
    int days=c.getActualMaximum(Calendar.DAY_OF_MONTH); 
    System.out.println(days); 
    //查看今年多少天 
    int doy=c.getActualMaximum(Calendar.DAY_OF_YEAR); 
    System.out.println(doy); 
    int t=c.getActualMaximum(Calendar.MINUTE); 
    System.out.println(t); 
  } 
} 

@Test 
  public void test01() throws ParseException{ 
    //要求用戶輸入一個(gè)日期,計(jì)算后,指定格式輸出日期 
    /*String--SimpleDateFormat()-->Date 
    Date-->Calendar 
    使用Calendar進(jìn)行相應(yīng)計(jì)算 
    Calendar-->Date 
    Date--SimpleDateFormat-->String 
    */ 
    String input="2013-03-26"; 
     
    SimpleDateFormat sdf=new SimpleDateFormat("yyyy-MM-dd"); 
    Date date=sdf.parse(input); 
    Calendar c=Calendar.getInstance(); 
    //set(),與add() 
    c.setTime(date); 
    c.add(Calendar.YEAR,1); 
    c.set(Calendar.MONTH,0); 
    c.set(Calendar.DAY_OF_WEEK,1); 
     
    date=c.getTime(); 
    SimpleDateFormat sdf2=new SimpleDateFormat("yyyy年MM月dd分hh時(shí)ss分mm秒"); 
    String strTime=sdf2.format(date); 
    System.out.println(strTime); 
  }