Cron表达式中周和数字是不对应的
周一：2；周二：3；周三：4；周四：5；周五：6；周六：7；周日：1
pom文件必须依赖
<dependency><groupId>com.cronutils</groupId><artifactId>cron-utils</artifactId><version>9.1.1</version></dependency><dependency><groupId>com.google.code.google-collections</groupId><artifactId>google-collect</artifactId><version>snapshot-0530</version></dependency>
创建CronUtils工具类
package com.example.demo.utils;import com.cronutils.model.CronType;import com.cronutils.model.definition.CronDefinition;import com.cronutils.model.definition.CronDefinitionBuilder;import com.cronutils.parser.CronParser;import mon.collect.Lists;import lombok.Data;import mons.lang3.StringUtils;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.ponent;import java.util.ArrayList;import java.util.Arrays;import java.util.List;import java.util.stream.Collectors;/*** ClassName : CronUtils* Description : Cron表达式工具类* Author : x x x* Date : /6/3 3:10 下午*/@Componentpublic class CronUtils {private static final Logger LOGGER = LoggerFactory.getLogger(CronUtils.class);private static final String QUESTION = "?";private static final String ASTERISK = "*";private static final String COMMA = ",";/*** 替换 分钟、小时、日期、星期*/private static final String ORIGINAL_CRON = "0 %s %s %s * %s";/*** 检查cron表达式的合法性*/public boolean checkValid(String cron) {try {CronDefinition cronDefinition = CronDefinitionBuilder.instanceDefinitionFor(CronType.SPRING);CronParser parser = new CronParser(cronDefinition);parser.parse(cron);} catch (IllegalArgumentException e) {LOGGER.error(String.format("cron=%s not valid", cron));return false;}return true;}public String buildCron(List<Integer> minutes, List<Integer> hours, List<Integer> weekdays) {String minute;if (minutes.equals(this.getInitMinutes())) {minute = ASTERISK;} else {minute = StringUtils.join(minutes, COMMA);}String hour;if (hours.equals(this.getInitHours())) {hour = ASTERISK;} else {hour = StringUtils.join(hours, COMMA);}String weekday;if (weekdays.equals(this.getInitWeekdays())) {weekday = QUESTION;} else {weekday = StringUtils.join(weekdays, COMMA);}// 重点：星期和日字段冲突，判断周日的前端输入if (weekday.equals(QUESTION)) {return String.format(ORIGINAL_CRON, minute, hour, ASTERISK, weekday);} else {return String.format(ORIGINAL_CRON, minute, hour, QUESTION, weekday);}}/*** 解析cron*/public CustomCronField parseCon(String cron) {if (!this.checkValid(cron)) {return null;}List<String> result = Arrays.asList(cron.trim().split(" "));CustomCronField field = new CustomCronField();if (result.get(1).contains(COMMA)) {field.setMinutes(Arrays.stream(result.get(1).split(COMMA)).map(Integer::parseInt).collect(Collectors.toList()));} else if (result.get(1).equals(ASTERISK)) {field.setMinutes(this.getInitMinutes());} else {field.setMinutes(Lists.newArrayList(Integer.parseInt(result.get(1))));}if (result.get(2).contains(COMMA)) {field.setHours(Arrays.stream(result.get(2).split(COMMA)).map(Integer::parseInt).collect(Collectors.toList()));} else if (result.get(2).equals(ASTERISK)) {field.setHours(this.getInitHours());} else {field.setHours(Lists.newArrayList(Integer.parseInt(result.get(2))));}if (result.get(5).contains(COMMA)) {field.setWeekdays(Arrays.stream(result.get(5).split(COMMA)).map(Integer::parseInt).collect(Collectors.toList()));} else if (result.get(5).equals(QUESTION)) {field.setWeekdays(this.getInitWeekdays());} else {field.setWeekdays(Lists.newArrayList(Integer.parseInt(result.get(5))));}return field;}/*** 将Cron表达式解析为中文*/public String translateToChinese(String cronExp) {if (cronExp == null || cronExp.length() < 1) {return "cron表达式为空";}String[] tmpCorns = cronExp.split(" ");StringBuffer sBuffer = new StringBuffer();if (tmpCorns.length == 6) {//解析月if (!tmpCorns[4].equals("*") && !tmpCorns[4].equals("?")) {if (tmpCorns[4].contains("/")) {sBuffer.append("从").append(tmpCorns[4].split("/")[0]).append("号开始").append(",每").append(tmpCorns[4].split("/")[1]).append("月");} else {sBuffer.append("每年").append(tmpCorns[4]).append("月");}}//解析周if (!tmpCorns[5].equals("*") && !tmpCorns[5].equals("?")) {if (tmpCorns[5].contains(",")) {sBuffer.append("每周").append(tmpCorns[5]).append("的");} else {sBuffer.append("每周");char[] tmpArray = tmpCorns[5].toCharArray();for (char tmp : tmpArray) {switch (tmp) {case '1':sBuffer.append("日");break;case '2':sBuffer.append("一");break;case '3':sBuffer.append("二");break;case '4':sBuffer.append("三");break;case '5':sBuffer.append("四");break;case '6':sBuffer.append("五");break;case '7':sBuffer.append("六");break;default:sBuffer.append(tmp);break;}}}}//解析日if (!tmpCorns[3].equals("?")) {if (sBuffer.toString().contains("一") && sBuffer.toString().contains("二") && sBuffer.toString().contains("三")&& sBuffer.toString().contains("四") && sBuffer.toString().contains("五") && sBuffer.toString().contains("六")&& sBuffer.toString().contains("日")) {}if (!tmpCorns[3].equals("*")) {if (tmpCorns[3].contains("/")) {sBuffer.append("每周从第").append(tmpCorns[3].split("/")[0]).append("天开始").append(",每").append(tmpCorns[3].split("/")[1]).append("天");} else {sBuffer.append("每月第").append(tmpCorns[3]).append("天");}}}//解析时if (!tmpCorns[2].equals("*")) {if (tmpCorns[2].contains("/")) {sBuffer.append("从").append(tmpCorns[2].split("/")[0]).append("点开始").append(",每").append(tmpCorns[2].split("/")[1]).append("小时");} else {if (!(sBuffer.toString().length() > 0)) {sBuffer.append("每天").append(tmpCorns[2]).append("点");}else {sBuffer.append(tmpCorns[2]).append("点");}}}//解析分if (!tmpCorns[1].equals("*")) {if (tmpCorns[1].contains("/")) {sBuffer.append("从第").append(tmpCorns[1].split("/")[0]).append("分开始").append(",每").append(tmpCorns[1].split("/")[1]).append("分");} else if (tmpCorns[1].equals("0")) {} else {sBuffer.append(tmpCorns[1]).append("分");}}if (sBuffer.toString().length() > 0) {sBuffer.append("执行一次");} else {sBuffer.append("表达式中文转换异常");}}return sBuffer.toString();}/***第二种格式*/public String translateToChinese2(String cronExp){if (cronExp == null || cronExp.length() < 1){return "cron表达式为空";}CronExpression exp = null;// 初始化cron表达式解析器try{exp = new CronExpression(cronExp);}catch (ParseException e){return "corn表达式不正确";}String[] tmpCorns = cronExp.split(" ");StringBuffer sBuffer = new StringBuffer();if(tmpCorns.length == 6){//解析月if(!tmpCorns[4].equals("*")){sBuffer.append(tmpCorns[4]).append("月");}else{sBuffer.append("每周");}//解析周if(!tmpCorns[5].equals("*") && !tmpCorns[5].equals("?")){char[] tmpArray = tmpCorns[5].toCharArray();for(char tmp:tmpArray){switch (tmp){case '1':sBuffer.append("星期天");break;case '2':sBuffer.append("星期一");break;case '3':sBuffer.append("星期二");break;case '4':sBuffer.append("星期三");break;case '5':sBuffer.append("星期四");break;case '6':sBuffer.append("星期五");break;case '7':sBuffer.append("星期六");break;case '-':sBuffer.append("至");break;default:sBuffer.append(tmp);break;}}}//解析日if(!tmpCorns[3].equals("?")){if(!tmpCorns[3].equals("*")){sBuffer.append(tmpCorns[3]).append("日");}else{sBuffer.append("每日");}}//解析时if(!tmpCorns[2].equals("*")){sBuffer.append(tmpCorns[2]).append("时");}else{sBuffer.append("每时");}//解析分if(!tmpCorns[1].equals("*")){sBuffer.append(tmpCorns[1]).append("分");}else{sBuffer.append("每分");}//解析秒if(!tmpCorns[0].equals("*")){sBuffer.append(tmpCorns[0]).append("秒");}else{sBuffer.append("每秒");}}return sBuffer.toString();}private List<Integer> initArray(Integer num) {List<Integer> result = Lists.newArrayListWithExpectedSize(num);for (int i = 0; i <= num; i++) {result.add(i);}return result;}public List<Integer> turnWeek(List<Integer> week){List<Integer> integers = new ArrayList<>();for (Integer integer : week) {switch (integer) {case 1:integers.add(2);break;case 2:integers.add(3);break;case 3:integers.add(4);break;case 4:integers.add(5);break;case 5:integers.add(6);break;case 6:integers.add(7);break;case 7:integers.add(1);break;default:break;}}return integers;}private List<Integer> getInitMinutes() {return this.initArray(59);}private List<Integer> getInitHours() {return this.initArray(23);}private List<Integer> getInitWeekdays() {return this.initArray(7).subList(1, 8);}@Datapublic static class CustomCronField {private List<Integer> minutes;private List<Integer> hours;private List<Integer> weekdays;}}
测试一下：
@RestController@RequestMapping("/cronTest")public class CronController {finalCronUtils cronUtils;public CronController(CronUtils cronUtils) {this.cronUtils = cronUtils;}@RequestMapping("/cron")public void cron(@RequestParam List<Integer> minutes,@RequestParam List<Integer> hours,@RequestParam List<Integer> weekdays){List<Integer> week = cronUtils.turnWeek(weekdays);String cron = cronUtils.buildCron(minutes,hours,week); //输出Cron表达式，周已转换System.out.println(cron);//TODO 周有问题，1：日；2：一；······CronUtils.CustomCronField cronField = cronUtils.parseCon(cron);System.out.println(cronField);//按格式输出时间System.out.println(cronUtils.translateToChinese(cron));//输出用户设置的中文格式System.out.println(cronUtils.translateToChinese2(cron));//第二种格式}}
