Java生成随机数工具类，进制之间的转换工具类，获取指定时间，时间格式转换工具类

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废话不多说，贡献一下code

1.编号生成工具

import org.apache.commons.lang3.StringUtils;import java.math.BigInteger;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Random;/** * 编号生成工具 */@SuppressWarnings("Duplicates")public abstract class CodeBuilder {    /**     * 生成新的流水编号     *     * @return 20位字符串     */    public static final String newTxCode() {        // 年月日时分秒毫秒(15位)        String time = new SimpleDateFormat("yyMMddHHmmssSSS").format(new Date());        StringBuilder builder = new StringBuilder(time);        Random random = new Random();        // 随机数(5位)        for (int i = 0; i < 5; i++) {            int nextInt = random.nextInt(10);            builder.append(nextInt);        }        return builder.toString();    }    public static final String genNextRadixCode(String precode) throws Exception {        if (StringUtils.isBlank(precode)) {            return "01";        }        int n=Integer.parseUnsignedInt(precode, 36);        n++;        return ten2radix(n,36).length()==1?"0"+ten2radix(n,36):ten2radix(n,36);    }    public static void main(String[] args) {        try {            System.out.println(genNextRadixCode("ZX"));        } catch (Exception e) {            e.printStackTrace();        }    }    /**     * baseString 递归调用     *     * @param num  十进制数     * @param base 要转换成的进制数     */    public static String ten2radix(int num, int base) {        String str = "", digit = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";        if (num == 0) {            return "";        } else {            str = ten2radix(num / base, base);            return str + digit.charAt(num % base);        }    }    /**     * baseString 递归调用     *     * @param num  十进制数     * @param base 要转换成的进制数     */    public static String ten2radix(BigInteger num, int base) {        String str = "", digit = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";        if (num.shortValue() == 0) {            return "";        } else {            BigInteger valueOf = BigInteger.valueOf(base);            str = ten2radix(num.divide(valueOf), base);            return str + digit.charAt(num.mod(valueOf).shortValue());        }    }    //随机生成指定长度的代码,包含数字    public static final String generateRandomNumber(int length) {        String allChar = "0123456789";        StringBuffer sb = new StringBuffer();        Random random = new Random();        for (int i = 0; i < length; i++) {            sb.append(allChar.charAt(random.nextInt(allChar.length())));        }        return sb.toString();    }}

2.日期工具

import org.apache.commons.lang3.StringUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Calendar;import java.util.Date;import java.util.TimeZone;import java.util.regex.Pattern;public class DateUtils {    private static Logger logger = LoggerFactory.getLogger(DateUtils.class);    private static final String DATE_FORMAT = "yyyy-MM-dd";    private static final String DATE_TIME_FORMAT_1 = "yyyy-MM-dd'T'HH:mm:ss";    public static final String DATE_TIME_FORMAT_2 = "yyyy-MM-dd HH:mm:ss";    public static final String DATE_TIME_FORMAT_3 = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";    public static final String DATE_TIME_FORMAT_4 = "MMddHHmmssSSS";    private static final Pattern DATE_PATTERN = Pattern.compile("^\\d{4}-\\d{2}-\\d{2}$");    private static final Pattern DATE_TIME_PATTERN_1 = Pattern.compile("^\\d{4}-\\d{2}-\\d{2}[T]\\d{2}:\\d{2}:\\d{2}$");    private static final Pattern DATE_TIME_PATTERN_2 = Pattern.compile("^\\d{4}-\\d{2}-\\d{2}\\s\\d{2}:\\d{2}:\\d{2}$");    public static Date addDays(Date start, int addDay) {        Date date = getDateBegin(start);        Calendar cs = Calendar.getInstance();        cs.setTime(date);        cs.set(Calendar.DAY_OF_MONTH, cs.get(Calendar.DAY_OF_MONTH) + addDay);//让日期加1        return cs.getTime();    }    public static Date parse(String dateString) {        Date date = null;        if (!StringUtils.isBlank(dateString)) {            try {                if (DATE_PATTERN.matcher(dateString).find()) {                    date = new SimpleDateFormat(DATE_FORMAT).parse(dateString);                } else if (DATE_TIME_PATTERN_1.matcher(dateString).find()) {                    date = new SimpleDateFormat(DATE_TIME_FORMAT_1).parse(dateString);                } else if (DATE_TIME_PATTERN_2.matcher(dateString).find()) {                    date = new SimpleDateFormat(DATE_TIME_FORMAT_2).parse(dateString);                }            } catch (ParseException e) {                logger.debug("Exception: {}", e);            }        }        return date;    }    /**     * 将日期字符串转换成指定格式的date     *     * @param 日期字符串     * @param 日期格式     * @return     */    public static Date formatStr(String str, String formatStr) {        Date date = null;        if (str != null) {            DateFormat sdf = new SimpleDateFormat(formatStr);            try {                if (formatStr.equals(DATE_TIME_FORMAT_3)) {                    sdf.setTimeZone(TimeZone.getTimeZone("UTC"));                }                date = sdf.parse(str);            } catch (ParseException e) {                e.printStackTrace();            }        }        return date;    }    /**     * 将日期转换成指定格式字符串     *     * @param date     * @param str     * @return     */    public static String formatDate(Date date, String str) {        SimpleDateFormat sdf = new SimpleDateFormat(str);        return sdf.format(date);    }    /**     * 获取月日时分秒时间戳字符串     *     * @return     */    public static String getTimeString() {        Date now = new Date();        DateFormat sdf = new SimpleDateFormat(DATE_TIME_FORMAT_4);        return sdf.format(now);    }    public static Date getDateBegin(Date date) {        if (date == null) {            date = new Date();        }        Calendar calendar = Calendar.getInstance();        calendar.setTime(date);        calendar.set(Calendar.HOUR_OF_DAY, 0);        calendar.set(Calendar.MINUTE, 0);        calendar.set(Calendar.SECOND, 0);        calendar.set(Calendar.MILLISECOND, 0);        return calendar.getTime();    }    public static Date getDateEnd(Date date) {        if (date == null) {            date = new Date();        }        Calendar calendar = Calendar.getInstance();        calendar.setTime(date);        calendar.set(Calendar.HOUR_OF_DAY, 23);        calendar.set(Calendar.MINUTE, 59);        calendar.set(Calendar.SECOND, 59);        calendar.set(Calendar.MILLISECOND, 999);        return calendar.getTime();    }}

3.时间工具

import java.util.Calendar;import java.util.Date;public class RemindDateUtils {    /**      * 获得本周的第一天，周一      *      * @return      */     public static Date getCurrentWeekDayStartTime() {         Calendar c = Calendar.getInstance();         int day_of_week = c.get(Calendar.DAY_OF_WEEK) - 1;        if (day_of_week == 0) {            day_of_week = 7;        }        c.add(Calendar.DATE, -day_of_week + 1);        c.set(Calendar.HOUR_OF_DAY, 0);        c.set(Calendar.MINUTE, 0);        c.set(Calendar.SECOND, 0);        return c.getTime();    }     /**      * 获得本周的最后一天，周日      *      * @return      */     public static Date getCurrentWeekDayEndTime() {         Calendar c = Calendar.getInstance();         int weekday = c.get(Calendar.DAY_OF_WEEK);         c.add(Calendar.DATE, 8 - weekday);        c.set(Calendar.HOUR_OF_DAY, 23);        c.set(Calendar.MINUTE, 59);        c.set(Calendar.SECOND, 59);        return c.getTime();    }     /**      * 获得本天的开始时间，即2012-01-01 00:00:00      *      * @return      */     public static Date getCurrentDayStartTime() {         Calendar c = Calendar.getInstance();         c.set(Calendar.HOUR_OF_DAY, 0);        c.set(Calendar.MINUTE, 0);        c.set(Calendar.SECOND, 0);        return c.getTime();    }     /**      * 获得本天的结束时间，即2012-01-01 23:59:59      *      * @return      */     public static Date getCurrentDayEndTime() {         Calendar c = Calendar.getInstance();         c.set(Calendar.HOUR_OF_DAY, 23);        c.set(Calendar.MINUTE, 59);        c.set(Calendar.SECOND, 59);        return c.getTime();    }     /**      * 获得本小时的开始时间，即2012-01-01 00:00:00      *      * @return      */     public static Date getCurrentHourStartTime() {         Calendar c = Calendar.getInstance();         c.set(Calendar.MINUTE, 0);        c.set(Calendar.SECOND, 0);        return c.getTime();    }     /**      * 获得本小时的结束时间，即2012-01-01 23:59:59      *      * @return      */     public static Date getCurrentHourEndTime() {         Calendar c = Calendar.getInstance();         c.set(Calendar.MINUTE, 59);        c.set(Calendar.SECOND, 59);        return c.getTime();    }     /**      * 获得本月的开始时间，即2012-01-01 00:00:00      *      * @return      */     public static Date getCurrentMonthStartTime() {         Calendar c = Calendar.getInstance();         c.set(Calendar.DATE, 1);         c.set(Calendar.HOUR_OF_DAY, 0);        c.set(Calendar.MINUTE, 0);        c.set(Calendar.SECOND, 0);        return c.getTime();    }     /**      * 当前月的结束时间，即2012-01-31 23:59:59      *      * @return      */     public static Date getCurrentMonthEndTime() {         Calendar c = Calendar.getInstance();         c.set(Calendar.DATE, 1);         c.add(Calendar.MONTH, 1);         c.add(Calendar.DATE, -1);         c.set(Calendar.HOUR_OF_DAY, 23);        c.set(Calendar.MINUTE, 59);        c.set(Calendar.SECOND, 59);        return c.getTime();    }     /**      * 当前年的开始时间，即2012-01-01 00:00:00      *      * @return      */     public static Date getCurrentYearStartTime() {         Calendar c = Calendar.getInstance();         c.set(Calendar.MONTH, 0);         c.set(Calendar.DATE, 1);         c.set(Calendar.HOUR_OF_DAY, 0);        c.set(Calendar.MINUTE, 0);        c.set(Calendar.SECOND, 0);        return c.getTime();     }     /**      * 当前年的结束时间，即2012-12-31 23:59:59      *      * @return      */     public static Date getCurrentYearEndTime() {         Calendar c = Calendar.getInstance();         c.set(Calendar.MONTH, 11);         c.set(Calendar.DATE, 31);         c.set(Calendar.HOUR_OF_DAY, 23);        c.set(Calendar.MINUTE, 59);        c.set(Calendar.SECOND, 59);        return c.getTime();    }     /**      * 当前季度的开始时间，即2012-01-1 00:00:00      *      * @return      */     public static Date getCurrentQuarterStartTime() {         Calendar c = Calendar.getInstance();        int currentMonth = c.get(Calendar.MONTH) + 1;         if (currentMonth >= 1 && currentMonth <= 3)             c.set(Calendar.MONTH, 0);         else if (currentMonth >= 4 && currentMonth <= 6)             c.set(Calendar.MONTH, 3);         else if (currentMonth >= 7 && currentMonth <= 9)             c.set(Calendar.MONTH, 4);         else if (currentMonth >= 10 && currentMonth <= 12)             c.set(Calendar.MONTH, 9);         c.set(Calendar.DATE, 1);         c.set(Calendar.HOUR_OF_DAY, 0);        c.set(Calendar.MINUTE, 0);        c.set(Calendar.SECOND, 0);        return c.getTime();     }     /**      * 当前季度的结束时间，即2012-03-31 23:59:59      *      * @return      */     public static Date getCurrentQuarterEndTime() {         Calendar c = Calendar.getInstance();         int currentMonth = c.get(Calendar.MONTH) + 1;         if (currentMonth >= 1 && currentMonth <= 3) {             c.set(Calendar.MONTH, 2);             c.set(Calendar.DATE, 31);         } else if (currentMonth >= 4 && currentMonth <= 6) {             c.set(Calendar.MONTH, 5);             c.set(Calendar.DATE, 30);         } else if (currentMonth >= 7 && currentMonth <= 9) {             c.set(Calendar.MONTH,8);             c.set(Calendar.DATE, 30);         } else if (currentMonth >= 10 && currentMonth <= 12) {             c.set(Calendar.MONTH, 11);             c.set(Calendar.DATE, 31);         }         c.set(Calendar.HOUR_OF_DAY, 23);        c.set(Calendar.MINUTE, 59);        c.set(Calendar.SECOND, 59);        return c.getTime();    }     /**      * 获取前/后半年的开始时间      * @return      */     public static Date getHalfYearStartTime(){         Calendar c = Calendar.getInstance();         int currentMonth = c.get(Calendar.MONTH) + 1;         if (currentMonth >= 1 && currentMonth <= 6){             c.set(Calendar.MONTH, 0);         }else if (currentMonth >= 7 && currentMonth <= 12){             c.set(Calendar.MONTH, 6);         }         c.set(Calendar.DATE, 1);         c.set(Calendar.HOUR_OF_DAY, 0);        c.set(Calendar.MINUTE, 0);        c.set(Calendar.SECOND, 0);        return c.getTime();    }     /**      * 获取前/后半年的结束时间      * @return      */     public static Date getHalfYearEndTime(){         Calendar c = Calendar.getInstance();         int currentMonth = c.get(Calendar.MONTH) + 1;         if (currentMonth >= 1 && currentMonth <= 6){             c.set(Calendar.MONTH, 5);             c.set(Calendar.DATE, 30);         }else if (currentMonth >= 7 && currentMonth <= 12){             c.set(Calendar.MONTH, 11);             c.set(Calendar.DATE, 31);         }         c.set(Calendar.HOUR_OF_DAY, 23);        c.set(Calendar.MINUTE, 59);        c.set(Calendar.SECOND, 59);        return c.getTime();    } }

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