DateUtils (unmz-common-util 1.0.20 API)

java.lang.Object
- net.unmz.java.util.date.DateUtils

```
public class DateUtils
extends Object
```
Project Name: 常用工具类集合功能描述：时间处理工具类

从以下版本开始:

JDK 1.8

版本:

1.0

作者:

Faritor

字段概要

字段
限定符和类型	字段和说明
`static String`	`CHINESE_EXPANDED_DATE_FORMAT` yyyy年MM月dd日
`static String`	`DATE_FORMAT_DATE_ONLY` 要用到的DATE Format的定义
`static String`	`DATE_FORMAT_DATETIME`
`static String`	`DATE_FORMAT_DATETIME_14`
`static String`	`DATETIME_PATTERN` yyyy-MM-dd hh:mm:ss
`static String`	`HMS_FORMAT`
`static String`	`ISO_DATE_FORMAT` Base ISO 8601 Date format yyyyMMdd i.e., 20021225 for the 25th day of December in the year 2002
`static String`	`ISO_EXPANDED_DATE_FORMAT` Expanded ISO 8601 Date format yyyy-MM-dd i.e., 2002-12-25 for the 25th day of December in the year 2002
`static String`	`ISO_SHORT_DATE_FORMAT` Expanded ISO 8601 Date format yyyy-MM-dd HH:mm 2002-12-25 13:45 for the 25th day of December in the year 2002
`static String`	`SHORT_DATE_FORMAT`
`static String`	`TAIWAN_DATE_FORMAT` yyyy/mm/dd；mm/dd；点:分:秒（12/24小时制）

方法概要

所有方法静态方法实例方法具体方法
限定符和类型	方法和说明
`static Date`	`addDay(Date date1, int addDay)` 在日期上加指定的天数,返回Date类型
`static String`	`addDayByString(String date, int addDay)` 在日期上加指定的天数,返回String类型
`static Date`	`addMonth(Date date1, int addMonth)` 在日期上加指定的月数
`static Date`	`addYear(Date date1, int addYear)` 在日期上加指定的年数
`static Date`	`dateFormart(Date date)` 根据时间变量返回时间字符串 yyyy-MM-dd
`static String`	`dateIncrease(String isoString, String fmt, int field, int amount)` 日期增加
`static Date`	`dateIncreaseByDay(Date date, int days)` 日期增加-按日增加
`static String`	`dateIncreaseByDay(String date, int days)` 日期增加
`static String`	`dateIncreaseByDay(String date, String fmt, int days)` 日期增加
`static Date`	`dateIncreaseByMonth(Date date, int mnt)` 日期增加-按月增加
`static Date`	`dateIncreaseByYear(Date date, int mnt)` 日期增加-按年增加
`static String`	`dateIncreaseByYearforString(String date, int mnt)` 日期增加-按年增加
`static String`	`dateToString(Date date)` 根据时间变量返回时间字符串 yyyy-MM-dd
`static String`	`dateToString(Date date, String pattern)` 根据时间变量返回时间字符串
`static String`	`dateToStringWithTime(Date date)` 返回当前日期+时间字符串 yyyy-MM-dd hh:mm:ss
`static int`	`daysBetween(Calendar early, Calendar late)` Returns the days between two dates.
`static int`	`daysBetween(Date early, Date late)` Returns the days between two dates.
`static String`	`getChineseDate(String src)` yyyy年MM月dd日
`static String`	`getCurrentDateString()` 返回当前日期字符串 yyyy-MM-dd
`static String`	`getCurrentDateString(String pattern)` 返回当前日期字符串
`static Date`	`getCurrentDateTime()` 返回当前时间
`static Date`	`getDateEnd(Date date)` 获取日期最晚时间，如传入2014-12-26，返回2014-12-26 23:59:59
`ArrayList<Date>`	`getDateList(Date startTime, Date endTime)`
`static long`	`getDateQuot(String time1, String time2)` 两个日期之间的天数
`static Date`	`getDateStart(Date date)` 获取日期最早时间，如传入2014-12-26，返回2014-12-26 0:00:00
`static String`	`getFirstDayOfMonth(Date date)` 获取月份的第一天
`static String`	`getGrpEndDate(String effdate, String loadEndDate, String loadBeginDate)`
`static DateUtils`	`getInstance()`
`static Date`	`getLastDayOfMonth(Date date)` 获取月份的最后一天
`static String`	`getPolicyEffDate(String src, String srcfmt, String desfmt)` yyyy年MM月dd日至yyyy年MM月dd日获取止期
`static String`	`getPolicyEndDate(String src, String srcfmt, String desfmt)` yyyy年MM月dd日至yyyy年MM月dd日获取止期
`static String`	`getPreOrNextDay(Date date, int num)` 获取前后七天
`protected static float`	`normalizedJulian(float JD)` 暂时不用
`static String`	`roll(String isoString, int field, boolean up)` Time Field Rolling function.
`static String`	`roll(String isoString, String fmt, int field, boolean up)` Time Field Rolling function.
`static Date`	`stringToDate(String dateString)` 字符串转换为日期java.util.Date
`static Date`	`stringToDate(String dateString, String format)` 字符串转换为日期java.util.Date
`static Date`	`stringToDate(String dateText, String format, boolean lenient)` 字符串转换为日期java.util.Date
`static String`	`stringToString(String dateString, String desfmt)` 日期字符串格式转换
`static String`	`stringToString(String src, String srcfmt, String desfmt)` 日期字符串格式转换
`static Date`	`toDate(float JD)` 浮点值转换成日期格式暂时不用 Returns the Date from a julian.
`static float`	`toJulian(Calendar c)` Return a Julian date based on the input parameter.
`static float`	`toJulian(Date date)` 暂时不用 Return a Julian date based on the input parameter.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - DATE_FORMAT_DATE_ONLY
```
public static final String DATE_FORMAT_DATE_ONLY
```
    要用到的DATE Format的定义
    
    另请参阅:
    
    常量字段值
  - DATE_FORMAT_DATETIME
```
public static final String DATE_FORMAT_DATETIME
```
    另请参阅:
    
    常量字段值
  - DATE_FORMAT_DATETIME_14
```
public static final String DATE_FORMAT_DATETIME_14
```
    另请参阅:
    
    常量字段值
  - SHORT_DATE_FORMAT
```
public static final String SHORT_DATE_FORMAT
```
    另请参阅:
    
    常量字段值
  - HMS_FORMAT
```
public static final String HMS_FORMAT
```
    另请参阅:
    
    常量字段值
  - ISO_DATE_FORMAT
```
public static final String ISO_DATE_FORMAT
```
    Base ISO 8601 Date format yyyyMMdd i.e., 20021225 for the 25th day of December in the year 2002
    
    另请参阅:
    
    常量字段值
  - ISO_EXPANDED_DATE_FORMAT
```
public static final String ISO_EXPANDED_DATE_FORMAT
```
    Expanded ISO 8601 Date format yyyy-MM-dd i.e., 2002-12-25 for the 25th day of December in the year 2002
    
    另请参阅:
    
    常量字段值
  - ISO_SHORT_DATE_FORMAT
```
public static final String ISO_SHORT_DATE_FORMAT
```
    Expanded ISO 8601 Date format yyyy-MM-dd HH:mm 2002-12-25 13:45 for the 25th day of December in the year 2002
    
    另请参阅:
    
    常量字段值
  - DATETIME_PATTERN
```
public static String DATETIME_PATTERN
```
    yyyy-MM-dd hh:mm:ss
  - CHINESE_EXPANDED_DATE_FORMAT
```
public static final String CHINESE_EXPANDED_DATE_FORMAT
```
    yyyy年MM月dd日
    
    另请参阅:
    
    常量字段值
  - TAIWAN_DATE_FORMAT
```
public static final String TAIWAN_DATE_FORMAT
```
    yyyy/mm/dd；mm/dd；点:分:秒（12/24小时制）
    
    另请参阅:
    
    常量字段值
- 方法详细资料
  - getInstance
```
public static DateUtils getInstance()
```
  - dateFormart
```
public static Date dateFormart(Date date)
```
    根据时间变量返回时间字符串 yyyy-MM-dd
    
    参数:
    
    date -
    
    返回:
  - normalizedJulian
```
protected static final float normalizedJulian(float JD)
```
    暂时不用
    
    参数:
    
    JD -
    
    返回:
  - getGrpEndDate
```
public static String getGrpEndDate(String effdate,
                                   String loadEndDate,
                                   String loadBeginDate)
```
  - toDate
```
public static final Date toDate(float JD)
```
    浮点值转换成日期格式
    暂时不用 Returns the Date from a julian. The Julian date will be converted to noon GMT, such that it matches the nearest half-integer (i.e., a julian date of 1.4 gets changed to 1.5, and 0.9 gets changed to 0.5.)
    
    参数:
    
    JD - the Julian date
    
    返回:
    
    the Gregorian date
  - daysBetween
```
public static final int daysBetween(Date early,
                                    Date late)
```
    Returns the days between two dates. Positive values indicate that the second date is after the first, and negative values indicate, well, the opposite. Relying on specific times is problematic.
    
    参数:
    
    early - the "first date"
    
    late - the "second date"
    
    返回:
    
    the days between the two dates
  - daysBetween
```
public static final int daysBetween(Calendar early,
                                    Calendar late)
```
    Returns the days between two dates. Positive values indicate that the second date is after the first, and negative values indicate, well, the opposite.
    
    参数:
    
    early -
    
    late -
    
    返回:
    
    the days between two dates.
  - toJulian
```
public static final float toJulian(Calendar c)
```
    Return a Julian date based on the input parameter. This is based from calculations found at Julian Day Calculations (Gregorian Calendar), provided by Bill Jeffrys.
    
    参数:
    
    c - a calendar instance
    
    返回:
    
    the julian day number
  - toJulian
```
public static final float toJulian(Date date)
```
    暂时不用 Return a Julian date based on the input parameter. This is based from calculations found at Julian Day Calculations (Gregorian Calendar), provided by Bill Jeffrys.
    
    参数:
    
    date -
    
    返回:
    
    the julian day number
  - dateIncrease
```
public static final String dateIncrease(String isoString,
                                        String fmt,
                                        int field,
                                        int amount)
```
    日期增加
    
    参数:
    
    isoString - 日期字符串
    
    fmt - 格式
    
    field - 年/月/日 Calendar.YEAR/Calendar.MONTH/Calendar.DATE
    
    amount - 增加数量
    
    返回:
    
    抛出:
    
    ParseException
  - roll
```
public static final String roll(String isoString,
                                String fmt,
                                int field,
                                boolean up)
                         throws ParseException
```
    Time Field Rolling function. Rolls (up/down) a single unit of time on the given time field.
    
    参数:
    
    isoString -
    
    field - the time field.
    
    up - Indicates if rolling up or rolling down the field value.
    
    fmt - use formating char's
    
    抛出:
    
    ParseException - if an unknown field value is given.
  - roll
```
public static final String roll(String isoString,
                                int field,
                                boolean up)
                         throws ParseException
```
    Time Field Rolling function. Rolls (up/down) a single unit of time on the given time field.
    
    参数:
    
    isoString -
    
    field - the time field.
    
    up - Indicates if rolling up or rolling down the field value.
    
    抛出:
    
    ParseException - if an unknown field value is given.
  - stringToDate
```
public static Date stringToDate(String dateText,
                                String format,
                                boolean lenient)
```
    字符串转换为日期java.util.Date
    
    参数:
    
    dateText - 字符串
    
    format - 日期格式
    
    lenient - 日期越界标志
    
    返回:
  - stringToDate
```
public static Date stringToDate(String dateString,
                                String format)
```
    字符串转换为日期java.util.Date
    
    参数:
    
    dateString - 字符串
    
    format - 日期格式
    
    返回:
  - stringToDate
```
public static Date stringToDate(String dateString)
```
    字符串转换为日期java.util.Date
    
    参数:
    
    dateString - 字符串
  - dateToString
```
public static String dateToString(Date date,
                                  String pattern)
```
    根据时间变量返回时间字符串
    
    参数:
    
    pattern - 时间字符串样式
    
    date - 时间变量
    
    返回:
    
    返回时间字符串
  - dateToString
```
public static String dateToString(Date date)
```
    根据时间变量返回时间字符串 yyyy-MM-dd
    
    参数:
    
    date -
    
    返回:
  - getCurrentDateTime
```
public static Date getCurrentDateTime()
```
    返回当前时间
    
    返回:
    
    返回当前时间
  - getCurrentDateString
```
public static String getCurrentDateString(String pattern)
```
    返回当前日期字符串
    
    参数:
    
    pattern - 日期字符串样式
    
    返回:
  - getCurrentDateString
```
public static String getCurrentDateString()
```
    返回当前日期字符串 yyyy-MM-dd
    
    返回:
  - dateToStringWithTime
```
public static String dateToStringWithTime(Date date)
```
    返回当前日期+时间字符串 yyyy-MM-dd hh:mm:ss
    
    参数:
    
    date -
    
    返回:
  - dateIncreaseByDay
```
public static Date dateIncreaseByDay(Date date,
                                     int days)
```
    日期增加-按日增加
    
    参数:
    
    date -
    
    days -
    
    返回:
    
    java.util.Date
  - dateIncreaseByMonth
```
public static Date dateIncreaseByMonth(Date date,
                                       int mnt)
```
    日期增加-按月增加
    
    参数:
    
    date -
    
    mnt -
    
    返回:
    
    java.util.Date
  - dateIncreaseByYear
```
public static Date dateIncreaseByYear(Date date,
                                      int mnt)
```
    日期增加-按年增加
    
    参数:
    
    date -
    
    mnt -
    
    返回:
    
    java.util.Date
  - dateIncreaseByYearforString
```
public static String dateIncreaseByYearforString(String date,
                                                 int mnt)
```
    日期增加-按年增加
    
    参数:
    
    date -
    
    mnt -
    
    返回:
    
    java.util.Date
  - dateIncreaseByDay
```
public static String dateIncreaseByDay(String date,
                                       int days)
```
    日期增加
    
    参数:
    
    date - 日期字符串 yyyy-MM-dd
    
    days -
    
    返回:
    
    日期字符串 yyyy-MM-dd
  - dateIncreaseByDay
```
public static String dateIncreaseByDay(String date,
                                       String fmt,
                                       int days)
```
    日期增加
    
    参数:
    
    date - 日期字符串
    
    fmt - 日期格式
    
    days -
    
    返回:
  - stringToString
```
public static String stringToString(String dateString,
                                    String desfmt)
```
    日期字符串格式转换
    
    参数:
    
    dateString - 日期字符串
    
    desfmt - 目标日期格式
    
    返回:
  - stringToString
```
public static String stringToString(String src,
                                    String srcfmt,
                                    String desfmt)
```
    日期字符串格式转换
    
    参数:
    
    src - 日期字符串
    
    srcfmt - 源日期格式
    
    desfmt - 目标日期格式
    
    返回:
  - getPolicyEndDate
```
public static String getPolicyEndDate(String src,
                                      String srcfmt,
                                      String desfmt)
```
    yyyy年MM月dd日至yyyy年MM月dd日获取止期
    
    参数:
    
    src - 日期字符串
    
    desfmt - 目标日期格式
    
    返回:
  - getPolicyEffDate
```
public static String getPolicyEffDate(String src,
                                      String srcfmt,
                                      String desfmt)
```
    yyyy年MM月dd日至yyyy年MM月dd日获取止期
    
    参数:
    
    src - 日期字符串
    
    desfmt - 目标日期格式
    
    返回:
  - getChineseDate
```
public static String getChineseDate(String src)
```
    yyyy年MM月dd日
    
    参数:
    
    src - 日期字符串
    
    返回:
  - getDateQuot
```
public static long getDateQuot(String time1,
                               String time2)
```
    两个日期之间的天数
    
    参数:
    
    time1 -
    
    time2 -
    
    返回:
  - addYear
```
public static Date addYear(Date date1,
                           int addYear)
```
    在日期上加指定的年数
    
    参数:
    
    -
    
    -
    
    返回:
  - addMonth
```
public static Date addMonth(Date date1,
                            int addMonth)
```
    在日期上加指定的月数
    
    参数:
    
    -
    
    -
    
    返回:
  - addDay
```
public static Date addDay(Date date1,
                          int addDay)
```
    在日期上加指定的天数,返回Date类型
    
    参数:
    
    -
    
    -
    
    返回:
  - addDayByString
```
public static String addDayByString(String date,
                                    int addDay)
```
    在日期上加指定的天数,返回String类型
    
    参数:
    
    -
    
    -
    
    返回:
  - getFirstDayOfMonth
```
public static String getFirstDayOfMonth(Date date)
```
    获取月份的第一天
    
    参数:
    
    date -
    
    返回:
  - getLastDayOfMonth
```
public static Date getLastDayOfMonth(Date date)
```
    获取月份的最后一天
    
    参数:
    
    date -
    
    返回:
  - getDateStart
```
public static Date getDateStart(Date date)
```
    获取日期最早时间，如传入2014-12-26，返回2014-12-26 0:00:00
    
    参数:
    
    date -
    
    返回:
  - getDateEnd
```
public static Date getDateEnd(Date date)
```
    获取日期最晚时间，如传入2014-12-26，返回2014-12-26 23:59:59
    
    参数:
    
    date -
    
    返回:
  - getDateList
```
public ArrayList<Date> getDateList(Date startTime,
                                   Date endTime)
```
  - getPreOrNextDay
```
public static String getPreOrNextDay(Date date,
                                     int num)
```
    获取前后七天
    
    参数:
    
    num - 7：后七天 -7：前七天
    
    返回:

类 DateUtils

字段概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

DATE_FORMAT_DATE_ONLY

DATE_FORMAT_DATETIME

DATE_FORMAT_DATETIME_14

SHORT_DATE_FORMAT

HMS_FORMAT

ISO_DATE_FORMAT

ISO_EXPANDED_DATE_FORMAT

ISO_SHORT_DATE_FORMAT

DATETIME_PATTERN

CHINESE_EXPANDED_DATE_FORMAT

TAIWAN_DATE_FORMAT

方法详细资料

getInstance

dateFormart

normalizedJulian

getGrpEndDate

toDate

daysBetween

daysBetween

toJulian

toJulian

dateIncrease

roll

roll

stringToDate

stringToDate

stringToDate

dateToString

dateToString

getCurrentDateTime

getCurrentDateString

getCurrentDateString

dateToStringWithTime

dateIncreaseByDay

dateIncreaseByMonth

dateIncreaseByYear

dateIncreaseByYearforString

dateIncreaseByDay

dateIncreaseByDay

stringToString

stringToString

getPolicyEndDate

getPolicyEffDate

getChineseDate

getDateQuot

addYear

addMonth

addDay

addDayByString

getFirstDayOfMonth

getLastDayOfMonth

getDateStart

getDateEnd

getDateList

getPreOrNextDay