DateUtil工具类

package com.tmeos.xueliang.util;import java.text.DateFormat;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Calendar;import java.util.Date;import java.util.GregorianCalendar;import java.util.List;import android.annotation.SuppressLint;public class DateUtil{private DateUtil(){throw new AssertionError();}public static long getCurrentData(){return System.currentTimeMillis();}@SuppressLint( "SimpleDateFormat" )public static String getCurformatData(){Calendar currentDate = Calendar.getInstance();String str = ( new SimpleDateFormat( "yyyy.MM.dd HH:mm E" ) ).format( currentDate.getTime() );return str;}@SuppressLint( "SimpleDateFormat" )public static String getCurformatDataNoWeek(){Calendar currentDate = Calendar.getInstance();String str = ( new SimpleDateFormat( "yyyyMMdd" ) ).format( currentDate.getTime() );return str;}public static long getDataBeginTime(){Calendar currentDate = Calendar.getInstance();currentDate.set( Calendar.HOUR_OF_DAY, 0 );currentDate.set( Calendar.MINUTE, 0 );currentDate.set( Calendar.SECOND, 0 );currentDate.set( Calendar.MILLISECOND, 0 );return currentDate.getTimeInMillis();}// 把日期转为字符串@SuppressLint( "SimpleDateFormat" )public static String converToString( Date date ){DateFormat df = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" );return df.format( date );}// 把字符串转为日期public static Date converToDate( String strDate ) throws Exception{DateFormat df = new SimpleDateFormat( "yyyy-MM-dd HH:mm:ss" );return df.parse( strDate );}public static String converToStringWithFormatter( Date date, String formatter ){DateFormat df = new SimpleDateFormat( formatter );return df.format( date );}public static String getHourMinSec( long ms ){Integer ss = 1000;Integer mi = ss * 60;Integer hh = mi * 60;Long hour = ms / hh;Long minute = ( ms - hour * hh ) / mi;Long second = ( ms - hour * hh - minute * mi ) / ss;StringBuffer sb = new StringBuffer();sb.append( String.format( "%02d", hour ) + ":" );sb.append( String.format( "%02d", minute ) + ":" );sb.append( String.format( "%02d", second ) );return sb.toString();}@SuppressLint( "SimpleDateFormat" )public static List< String > get7DaysAgoAndWeek(){List< String > list = new ArrayList< String >();SimpleDateFormat sdf = new SimpleDateFormat( "MM.dd" );SimpleDateFormat sdf_week = new SimpleDateFormat( "E" );for ( int i = 0; i < 7; i++ ){Calendar c = Calendar.getInstance();if ( i == 0 ){c.add( Calendar.DATE, 0 );list.add( sdf_week.format( c.getTime() ) );}else if ( i == 1 ){c.add( Calendar.DATE, -1 );list.add( sdf_week.format( c.getTime() ) );}else if ( i == 2 ){c.add( Calendar.DATE, -2 );list.add( sdf_week.format( c.getTime() ) );}else{c.add( Calendar.DATE, -i );list.add( sdf_week.format( c.getTime() ) );}}return list;}@SuppressLint( "SimpleDateFormat" )public static List< String > get7DaysAgoAndWeek_(){List< String > list = new ArrayList< String >();SimpleDateFormat sdf = new SimpleDateFormat( "MM-dd" );SimpleDateFormat sdf_week = new SimpleDateFormat( "E" );for ( int i = 0; i < 7; i++ ){Calendar c = Calendar.getInstance();if ( i == 0 ){c.add( Calendar.DATE, 0 );list.add( "今天" );}else if ( i == 1 ){c.add( Calendar.DATE, -1 );list.add( sdf.format( c.getTime() ) );}else if ( i == 2 ){c.add( Calendar.DATE, -2 );list.add( sdf.format( c.getTime() ) );}else{c.add( Calendar.DATE, -i );list.add( sdf.format( c.getTime() ) );}}return list;}@SuppressLint( "SimpleDateFormat" )public static String[] getSevenWeek(){String[] weekStrings = new String[ 7 ];SimpleDateFormat sdf_week = new SimpleDateFormat( "E" );for ( int i = 0; i < 7; i++ ){Calendar c = Calendar.getInstance();if ( i == 0 ){c.add( Calendar.DATE, 0 );weekStrings[i] = sdf_week.format( c.getTime() );}else if ( i == 1 ){c.add( Calendar.DATE, -1 );weekStrings[i] = sdf_week.format( c.getTime() );}else if ( i == 2 ){c.add( Calendar.DATE, -2 );weekStrings[i] = sdf_week.format( c.getTime() );}else{c.add( Calendar.DATE, -i );weekStrings[i] = sdf_week.format( c.getTime() );}}return weekStrings;}/* * 获取今天之前的七天（包括今天）的日期（只显示到某日） */@SuppressLint( "SimpleDateFormat" )public static List< String > get7DaysAgo(){List< String > list = new ArrayList< String >();SimpleDateFormat sdf = new SimpleDateFormat( "yyyy-MM-dd" );for ( int i = 0; i < 7; i++ ){Calendar c = Calendar.getInstance();c.add( Calendar.DATE, -i );list.add( sdf.format( c.getTime() ) );}return list;}/* * 获得前七天那天是第几日 */public static long get7TheDay(){Calendar c = Calendar.getInstance();c.add( Calendar.DAY_OF_MONTH, -7 );c.set( Calendar.MINUTE, 0 );c.set( Calendar.SECOND, 0 );c.set( Calendar.MILLISECOND, 0 );return c.getTimeInMillis();}/* * 毫秒的日期转为日期类型 */public static String milliDate2Day( long date ){Date dat = new Date( date );GregorianCalendar gc = new GregorianCalendar();gc.setTime( dat );java.text.SimpleDateFormat format = new java.text.SimpleDateFormat( "dd" );String day = format.format( gc.getTime() );return day;}/* * 获得前20天那天是第几日 */public static long get20TheDay(){Calendar c = Calendar.getInstance();c.add( Calendar.DAY_OF_MONTH, -20 );c.set( Calendar.MINUTE, 0 );c.set( Calendar.SECOND, 0 );c.set( Calendar.MILLISECOND, 0 );return c.getTimeInMillis();}}