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

痛定思痛。 2022-07-16 14:59 231阅读 0赞

废话不多说，贡献一下code

1.编号生成工具

  1. import org.apache.commons.lang3.StringUtils;
  3. import java.math.BigInteger;
  4. import java.text.SimpleDateFormat;
  5. import java.util.Date;
  6. import java.util.Random;
  8. /** * 编号生成工具 */
  9. @SuppressWarnings("Duplicates")
  10. public abstract class CodeBuilder { 
  11.     /** * 生成新的流水编号 * * @return 20位字符串 */
  12.     public static final String newTxCode() {
  13.         // 年月日时分秒毫秒(15位)
  14.         String time = new SimpleDateFormat("yyMMddHHmmssSSS").format(new Date());
  15.         StringBuilder builder = new StringBuilder(time);
  16.         Random random = new Random();
  17.         // 随机数(5位)
  18.         for (int i = 0; i < 5; i++) {
  19.             int nextInt = random.nextInt(10);
  20.             builder.append(nextInt);
  21.         }
  23.         return builder.toString();
  24.     }
  26.     public static final String genNextRadixCode(String precode) throws Exception {
  27.         if (StringUtils.isBlank(precode)) {
  28.             return "01";
  29.         }
  30.         int n=Integer.parseUnsignedInt(precode, 36);
  31.         n++;
  32.         return ten2radix(n,36).length()==1?"0"+ten2radix(n,36):ten2radix(n,36);
  33.     }
  35.     public static void main(String[] args) {
  36.         try {
  37.             System.out.println(genNextRadixCode("ZX"));
  38.         } catch (Exception e) {
  39.             e.printStackTrace();
  40.         }
  41.     }
  44.     /** * baseString 递归调用 * * @param num 十进制数 * @param base 要转换成的进制数 */
  45.     public static String ten2radix(int num, int base) {
  46.         String str = "", digit = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  47.         if (num == 0) {
  48.             return "";
  49.         } else {
  50.             str = ten2radix(num / base, base);
  51.             return str + digit.charAt(num % base);
  52.         }
  53.     }
  55.     /** * baseString 递归调用 * * @param num 十进制数 * @param base 要转换成的进制数 */
  56.     public static String ten2radix(BigInteger num, int base) {
  57.         String str = "", digit = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  58.         if (num.shortValue() == 0) {
  59.             return "";
  60.         } else {
  61.             BigInteger valueOf = BigInteger.valueOf(base);
  62.             str = ten2radix(num.divide(valueOf), base);
  63.             return str + digit.charAt(num.mod(valueOf).shortValue());
  64.         }
  65.     }
  67.     //随机生成指定长度的代码,包含数字
  68.     public static final String generateRandomNumber(int length) {
  69.         String allChar = "0123456789";
  70.         StringBuffer sb = new StringBuffer();
  71.         Random random = new Random();
  72.         for (int i = 0; i < length; i++) {
  73.             sb.append(allChar.charAt(random.nextInt(allChar.length())));
  74.         }
  75.         return sb.toString();
  76.     }
  78. }

2.日期工具

  1. import org.apache.commons.lang3.StringUtils;
  2. import org.slf4j.Logger;
  3. import org.slf4j.LoggerFactory;
  5. import java.text.DateFormat;
  6. import java.text.ParseException;
  7. import java.text.SimpleDateFormat;
  8. import java.util.Calendar;
  9. import java.util.Date;
  10. import java.util.TimeZone;
  11. import java.util.regex.Pattern;
  13. public class DateUtils { 
  15.     private static Logger logger = LoggerFactory.getLogger(DateUtils.class);
  17.     private static final String DATE_FORMAT = "yyyy-MM-dd";
  18.     private static final String DATE_TIME_FORMAT_1 = "yyyy-MM-dd'T'HH:mm:ss";
  19.     public static final String DATE_TIME_FORMAT_2 = "yyyy-MM-dd HH:mm:ss";
  20.     public static final String DATE_TIME_FORMAT_3 = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'";
  21.     public static final String DATE_TIME_FORMAT_4 = "MMddHHmmssSSS";
  23.     private static final Pattern DATE_PATTERN = Pattern.compile("^\\d{4}-\\d{2}-\\d{2}$");
  24.     private static final Pattern DATE_TIME_PATTERN_1 = Pattern.compile("^\\d{4}-\\d{2}-\\d{2}[T]\\d{2}:\\d{2}:\\d{2}$");
  25.     private static final Pattern DATE_TIME_PATTERN_2 = Pattern.compile("^\\d{4}-\\d{2}-\\d{2}\\s\\d{2}:\\d{2}:\\d{2}$");
  27.     public static Date addDays(Date start, int addDay) {
  28.         Date date = getDateBegin(start);
  29.         Calendar cs = Calendar.getInstance();
  30.         cs.setTime(date);
  31.         cs.set(Calendar.DAY_OF_MONTH, cs.get(Calendar.DAY_OF_MONTH) + addDay);//让日期加1
  32.         return cs.getTime();
  33.     }
  35.     public static Date parse(String dateString) {
  36.         Date date = null;
  37.         if (!StringUtils.isBlank(dateString)) {
  38.             try {
  39.                 if (DATE_PATTERN.matcher(dateString).find()) {
  40.                     date = new SimpleDateFormat(DATE_FORMAT).parse(dateString);
  41.                 } else if (DATE_TIME_PATTERN_1.matcher(dateString).find()) {
  42.                     date = new SimpleDateFormat(DATE_TIME_FORMAT_1).parse(dateString);
  43.                 } else if (DATE_TIME_PATTERN_2.matcher(dateString).find()) {
  44.                     date = new SimpleDateFormat(DATE_TIME_FORMAT_2).parse(dateString);
  45.                 }
  46.             } catch (ParseException e) {
  47.                 logger.debug("Exception: {}", e);
  48.             }
  49.         }
  51.         return date;
  52.     }
  54.     /** * 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 */
  55.     public static Date formatStr(String str, String formatStr) {
  57.         Date date = null;
  58.         if (str != null) {
  59.             DateFormat sdf = new SimpleDateFormat(formatStr);
  60.             try {
  61.                 if (formatStr.equals(DATE_TIME_FORMAT_3)) {
  62.                     sdf.setTimeZone(TimeZone.getTimeZone("UTC"));
  63.                 }
  64.                 date = sdf.parse(str);
  65.             } catch (ParseException e) {
  66.                 e.printStackTrace();
  67.             }
  68.         }
  69.         return date;
  70.     }
  72.     /** * 将日期转换成指定格式字符串 * * @param date * @param str * @return */
  73.     public static String formatDate(Date date, String str) {
  74.         SimpleDateFormat sdf = new SimpleDateFormat(str);
  75.         return sdf.format(date);
  76.     }
  78.     /** * 获取月日时分秒时间戳字符串 * * @return */
  79.     public static String getTimeString() {
  80.         Date now = new Date();
  81.         DateFormat sdf = new SimpleDateFormat(DATE_TIME_FORMAT_4);
  82.         return sdf.format(now);
  83.     }
  85.     public static Date getDateBegin(Date date) {
  86.         if (date == null) {
  87.             date = new Date();
  88.         }
  89.         Calendar calendar = Calendar.getInstance();
  90.         calendar.setTime(date);
  91.         calendar.set(Calendar.HOUR_OF_DAY, 0);
  92.         calendar.set(Calendar.MINUTE, 0);
  93.         calendar.set(Calendar.SECOND, 0);
  94.         calendar.set(Calendar.MILLISECOND, 0);
  95.         return calendar.getTime();
  96.     }
  98.     public static Date getDateEnd(Date date) {
  99.         if (date == null) {
  100.             date = new Date();
  101.         }
  102.         Calendar calendar = Calendar.getInstance();
  103.         calendar.setTime(date);
  104.         calendar.set(Calendar.HOUR_OF_DAY, 23);
  105.         calendar.set(Calendar.MINUTE, 59);
  106.         calendar.set(Calendar.SECOND, 59);
  107.         calendar.set(Calendar.MILLISECOND, 999);
  108.         return calendar.getTime();
  109.     }
  111. }

3.时间工具

  1. import java.util.Calendar;
  2. import java.util.Date;
  4. public class RemindDateUtils { 
  5.     /** * 获得本周的第一天，周一 * * @return */ 
  6.     public static Date getCurrentWeekDayStartTime() { 
  7.         Calendar c = Calendar.getInstance(); 
  8.         int day_of_week = c.get(Calendar.DAY_OF_WEEK) - 1;
  9.         if (day_of_week == 0) {
  10.             day_of_week = 7;
  11.         }
  12.         c.add(Calendar.DATE, -day_of_week + 1);
  13.         c.set(Calendar.HOUR_OF_DAY, 0);
  14.         c.set(Calendar.MINUTE, 0);
  15.         c.set(Calendar.SECOND, 0);
  16.         return c.getTime();
  17.     } 
  19.     /** * 获得本周的最后一天，周日 * * @return */ 
  20.     public static Date getCurrentWeekDayEndTime() { 
  21.         Calendar c = Calendar.getInstance(); 
  22.         int weekday = c.get(Calendar.DAY_OF_WEEK); 
  23.         c.add(Calendar.DATE, 8 - weekday);
  24.         c.set(Calendar.HOUR_OF_DAY, 23);
  25.         c.set(Calendar.MINUTE, 59);
  26.         c.set(Calendar.SECOND, 59);
  27.         return c.getTime();
  28.     } 
  30.     /** * 获得本天的开始时间，即2012-01-01 00:00:00 * * @return */ 
  31.     public static Date getCurrentDayStartTime() { 
  32.         Calendar c = Calendar.getInstance(); 
  33.         c.set(Calendar.HOUR_OF_DAY, 0);
  34.         c.set(Calendar.MINUTE, 0);
  35.         c.set(Calendar.SECOND, 0);
  36.         return c.getTime();
  37.     } 
  39.     /** * 获得本天的结束时间，即2012-01-01 23:59:59 * * @return */ 
  40.     public static Date getCurrentDayEndTime() { 
  41.         Calendar c = Calendar.getInstance(); 
  42.         c.set(Calendar.HOUR_OF_DAY, 23);
  43.         c.set(Calendar.MINUTE, 59);
  44.         c.set(Calendar.SECOND, 59);
  45.         return c.getTime();
  46.     } 
  48.     /** * 获得本小时的开始时间，即2012-01-01 00:00:00 * * @return */ 
  49.     public static Date getCurrentHourStartTime() { 
  50.         Calendar c = Calendar.getInstance(); 
  51.         c.set(Calendar.MINUTE, 0);
  52.         c.set(Calendar.SECOND, 0);
  53.         return c.getTime();
  54.     } 
  56.     /** * 获得本小时的结束时间，即2012-01-01 23:59:59 * * @return */ 
  57.     public static Date getCurrentHourEndTime() { 
  58.         Calendar c = Calendar.getInstance(); 
  59.         c.set(Calendar.MINUTE, 59);
  60.         c.set(Calendar.SECOND, 59);
  61.         return c.getTime();
  62.     } 
  64.     /** * 获得本月的开始时间，即2012-01-01 00:00:00 * * @return */ 
  65.     public static Date getCurrentMonthStartTime() { 
  66.         Calendar c = Calendar.getInstance(); 
  67.         c.set(Calendar.DATE, 1); 
  68.         c.set(Calendar.HOUR_OF_DAY, 0);
  69.         c.set(Calendar.MINUTE, 0);
  70.         c.set(Calendar.SECOND, 0);
  71.         return c.getTime();
  72.     } 
  74.     /** * 当前月的结束时间，即2012-01-31 23:59:59 * * @return */ 
  75.     public static Date getCurrentMonthEndTime() { 
  76.         Calendar c = Calendar.getInstance(); 
  77.         c.set(Calendar.DATE, 1); 
  78.         c.add(Calendar.MONTH, 1); 
  79.         c.add(Calendar.DATE, -1); 
  80.         c.set(Calendar.HOUR_OF_DAY, 23);
  81.         c.set(Calendar.MINUTE, 59);
  82.         c.set(Calendar.SECOND, 59);
  83.         return c.getTime();
  84.     } 
  86.     /** * 当前年的开始时间，即2012-01-01 00:00:00 * * @return */ 
  87.     public static Date getCurrentYearStartTime() { 
  88.         Calendar c = Calendar.getInstance(); 
  89.         c.set(Calendar.MONTH, 0); 
  90.         c.set(Calendar.DATE, 1); 
  91.         c.set(Calendar.HOUR_OF_DAY, 0);
  92.         c.set(Calendar.MINUTE, 0);
  93.         c.set(Calendar.SECOND, 0);
  94.         return c.getTime(); 
  95.     } 
  97.     /** * 当前年的结束时间，即2012-12-31 23:59:59 * * @return */ 
  98.     public static Date getCurrentYearEndTime() { 
  99.         Calendar c = Calendar.getInstance(); 
  100.         c.set(Calendar.MONTH, 11); 
  101.         c.set(Calendar.DATE, 31); 
  102.         c.set(Calendar.HOUR_OF_DAY, 23);
  103.         c.set(Calendar.MINUTE, 59);
  104.         c.set(Calendar.SECOND, 59);
  105.         return c.getTime();
  106.     } 
  108.     /** * 当前季度的开始时间，即2012-01-1 00:00:00 * * @return */ 
  109.     public static Date getCurrentQuarterStartTime() { 
  110.         Calendar c = Calendar.getInstance();
  111.         int currentMonth = c.get(Calendar.MONTH) + 1; 
  112.         if (currentMonth >= 1 && currentMonth <= 3) 
  113.             c.set(Calendar.MONTH, 0); 
  114.         else if (currentMonth >= 4 && currentMonth <= 6) 
  115.             c.set(Calendar.MONTH, 3); 
  116.         else if (currentMonth >= 7 && currentMonth <= 9) 
  117.             c.set(Calendar.MONTH, 4); 
  118.         else if (currentMonth >= 10 && currentMonth <= 12) 
  119.             c.set(Calendar.MONTH, 9); 
  120.         c.set(Calendar.DATE, 1); 
  121.         c.set(Calendar.HOUR_OF_DAY, 0);
  122.         c.set(Calendar.MINUTE, 0);
  123.         c.set(Calendar.SECOND, 0);
  124.         return c.getTime(); 
  125.     } 
  127.     /** * 当前季度的结束时间，即2012-03-31 23:59:59 * * @return */ 
  128.     public static Date getCurrentQuarterEndTime() { 
  129.         Calendar c = Calendar.getInstance(); 
  130.         int currentMonth = c.get(Calendar.MONTH) + 1; 
  131.         if (currentMonth >= 1 && currentMonth <= 3) { 
  132.             c.set(Calendar.MONTH, 2); 
  133.             c.set(Calendar.DATE, 31); 
  134.         } else if (currentMonth >= 4 && currentMonth <= 6) { 
  135.             c.set(Calendar.MONTH, 5); 
  136.             c.set(Calendar.DATE, 30); 
  137.         } else if (currentMonth >= 7 && currentMonth <= 9) { 
  138.             c.set(Calendar.MONTH,8); 
  139.             c.set(Calendar.DATE, 30); 
  140.         } else if (currentMonth >= 10 && currentMonth <= 12) { 
  141.             c.set(Calendar.MONTH, 11); 
  142.             c.set(Calendar.DATE, 31); 
  143.         } 
  144.         c.set(Calendar.HOUR_OF_DAY, 23);
  145.         c.set(Calendar.MINUTE, 59);
  146.         c.set(Calendar.SECOND, 59);
  147.         return c.getTime();
  148.     } 
  149.     /** * 获取前/后半年的开始时间 * @return */ 
  150.     public static Date getHalfYearStartTime(){ 
  151.         Calendar c = Calendar.getInstance(); 
  152.         int currentMonth = c.get(Calendar.MONTH) + 1; 
  153.         if (currentMonth >= 1 && currentMonth <= 6){ 
  154.             c.set(Calendar.MONTH, 0); 
  155.         }else if (currentMonth >= 7 && currentMonth <= 12){ 
  156.             c.set(Calendar.MONTH, 6); 
  157.         } 
  158.         c.set(Calendar.DATE, 1); 
  159.         c.set(Calendar.HOUR_OF_DAY, 0);
  160.         c.set(Calendar.MINUTE, 0);
  161.         c.set(Calendar.SECOND, 0);
  162.         return c.getTime();
  164.     } 
  165.     /** * 获取前/后半年的结束时间 * @return */ 
  166.     public static Date getHalfYearEndTime(){ 
  167.         Calendar c = Calendar.getInstance(); 
  168.         int currentMonth = c.get(Calendar.MONTH) + 1; 
  169.         if (currentMonth >= 1 && currentMonth <= 6){ 
  170.             c.set(Calendar.MONTH, 5); 
  171.             c.set(Calendar.DATE, 30); 
  172.         }else if (currentMonth >= 7 && currentMonth <= 12){ 
  173.             c.set(Calendar.MONTH, 11); 
  174.             c.set(Calendar.DATE, 31); 
  175.         } 
  176.         c.set(Calendar.HOUR_OF_DAY, 23);
  177.         c.set(Calendar.MINUTE, 59);
  178.         c.set(Calendar.SECOND, 59);
  179.         return c.getTime();
  180.     } 
  181. }

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