Gary
1 year ago
parent
e812995138
commit
0b0285b6ee
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package enums;
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public enum DateTimePatternEnum {
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YYYY_MM_DD_HH_MM_SS("yyyy-MM-dd HH:mm:ss"), YYYY_MM_DD("yyyy-MM-dd"), YYYYMM("YYYYMM"),YYYY_DOT_MM_DOT_DD("yyyy.MM.dd");
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private String pattern;
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DateTimePatternEnum(String pattern) {
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this.pattern = pattern;
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}
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public String getPattern() {
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return pattern;
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}
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}
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package util;
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import java.text.ParseException;
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import java.text.SimpleDateFormat;
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import java.time.Instant;
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import java.time.LocalDate;
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import java.time.LocalDateTime;
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import java.time.ZoneId;
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import java.time.format.DateTimeFormatter;
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import java.time.temporal.ChronoUnit;
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import java.util.Date;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import enums.DateTimePatternEnum;
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public class DateUtil {
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private static final Object lockObj = new Object();
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private static Map<String, ThreadLocal<SimpleDateFormat>> sdfMap = new HashMap<String, ThreadLocal<SimpleDateFormat>>();
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private static SimpleDateFormat getSdf(final String pattern) {
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ThreadLocal<SimpleDateFormat> tl = sdfMap.get(pattern);
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if (tl == null) {
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synchronized (lockObj) {
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tl = sdfMap.get(pattern);
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if (tl == null) {
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tl = new ThreadLocal<SimpleDateFormat>() {
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@Override
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protected SimpleDateFormat initialValue() {
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return new SimpleDateFormat(pattern);
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}
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};
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sdfMap.put(pattern, tl);
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}
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}
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}
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return tl.get();
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}
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public static String format(Date date, String pattern) {
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return getSdf(pattern).format(date);
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}
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public static Date parse(String dateStr, String pattern) {
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try {
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return getSdf(pattern).parse(dateStr);
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} catch (ParseException e) {
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e.printStackTrace();
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}
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return new Date();
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}
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public static LocalDate fromLocateDate2String(Date date) {
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Instant instant = date.toInstant();
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ZoneId zone = ZoneId.systemDefault();
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LocalDate localDate = instant.atZone(zone).toLocalDate();
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return localDate;
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}
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public static Date getDayAgo(Integer day) {
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LocalDateTime localDateTime = LocalDateTime.now().minusDays(day);
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ZoneId zone = ZoneId.systemDefault();
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Instant instant = localDateTime.atZone(zone).toInstant();
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return Date.from(instant);
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}
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public static List<String> getBetweenDate(Date startDate, Date endDate) {
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LocalDate startLocalDate = fromLocateDate2String(startDate);
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LocalDate endLocalDate = fromLocateDate2String(endDate);
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long numOfDays = ChronoUnit.DAYS.between(startLocalDate, endLocalDate) + 1;
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List<LocalDate> localDateList = Stream.iterate(startLocalDate, date -> date.plusDays(1)).limit(numOfDays).collect(Collectors.toList());
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List<String> dateList = localDateList.stream().map(date -> date.format(DateTimeFormatter.ofPattern(DateTimePatternEnum.YYYY_MM_DD.getPattern()))).collect(Collectors.toList());
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return dateList;
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}
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}
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@ -0,0 +1,20 @@
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package com.luoo.user.controller;
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import static org.junit.Assert.*;
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import java.util.Date;
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import org.junit.Test;
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import enums.DateTimePatternEnum;
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import util.DateUtil;
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public class MyControllerTest {
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@Test
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public void testBirthDay() {
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String birthDay="2020.02.02";
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Date date=DateUtil.parse(birthDay, DateTimePatternEnum.YYYY_DOT_MM_DOT_DD.getPattern());
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assertTrue(null!=date);
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}
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}
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@ -0,0 +1,39 @@
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package com.luoo.user.util;
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import java.util.stream.IntStream;
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import org.junit.Test;
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import org.springframework.util.StopWatch;
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import com.apifan.common.random.RandomSource;
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public class NickNameUtilTest {
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int size = 4;
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String[] content = new String[] { "~", "`", "@", "$", "%", "^", "&", "*", "+", "-", "|", ".", "<", ">" };
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@Test
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public void test() {
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int total = 100000;
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System.out.println("total: " + total);
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StopWatch sw = new StopWatch();
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sw.start();
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IntStream.range(0, total).parallel().mapToObj(j -> getRandomNickName()).limit(100).forEach(System.out::println);
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for (int i = 4; i < 5; i++) {
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size = i;
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long distinctNickName = IntStream.range(0, total).parallel().mapToObj(j -> getRandomNickName()).distinct()
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.count();
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System.out.println("length: " + i + " distinctCount: " + distinctNickName);
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}
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sw.stop();
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System.out.println(sw.prettyPrint());
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}
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public String getRandomNickName() {
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int index = RandomSource.numberSource().randomInt(0, content.length);
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String character = content[index];
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return "雀乐-" + RandomSource.personInfoSource().randomChineseNickName(4) + character
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+ RandomSource.personInfoSource().randomChineseNickName(4);
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}
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}
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