JAvaはcron式を生成し、Cron式ツールクラスを自動的に生成する

package com.south.utils;

import com.south.data.vo.TaskScheduleModel;

/**
 * @Classname CronUtil
 * @Description TODO
 * @Date 2019/7/30 17:39
 * @Created by zhangzhenjun
 */
public class CronUtil {

    /**
     *
     *    ：  Cron   
     *@param  taskScheduleModel
     *@return String
     */
    public static String createCronExpression(TaskScheduleModel taskScheduleModel){
        StringBuffer cronExp = new StringBuffer("");

        if(null == taskScheduleModel.getJobType()) {
            System.out.println("       " );//       
        }

        if (null != taskScheduleModel.getSecond()
                && null == taskScheduleModel.getMinute()
                && null == taskScheduleModel.getHour()){
            //    
            if (taskScheduleModel.getJobType().intValue() == 0) {
                cronExp.append("0/").append(taskScheduleModel.getSecond());
                cronExp.append(" ");
                cronExp.append("* ");
                cronExp.append("* ");
                cronExp.append("* ");
                cronExp.append("* ");
                cronExp.append("?");
            }

        }

        if (null != taskScheduleModel.getSecond()
                && null != taskScheduleModel.getMinute()
                && null == taskScheduleModel.getHour()){
            //     
            if (taskScheduleModel.getJobType().intValue() == 4) {
                cronExp.append("* ");
                cronExp.append("0/").append(taskScheduleModel.getMinute());
                cronExp.append(" ");
                cronExp.append("* ");
                cronExp.append("* ");
                cronExp.append("* ");
                cronExp.append("?");
            }

        }

        if (null != taskScheduleModel.getSecond()
                && null != taskScheduleModel.getMinute()
                && null != taskScheduleModel.getHour()) {
            // 
            cronExp.append(taskScheduleModel.getSecond()).append(" ");
            // 
            cronExp.append(taskScheduleModel.getMinute()).append(" ");
            //  
            cronExp.append(taskScheduleModel.getHour()).append(" ");

            //  
            if(taskScheduleModel.getJobType().intValue() == 1){
                cronExp.append("* ");// 
                cronExp.append("* ");// 
                cronExp.append("?");// 
            }

            //   
            else if(taskScheduleModel.getJobType().intValue() == 3){
                //       
                cronExp.append("? ");
                //  
                cronExp.append("* ");
                // 
                Integer[] weeks = taskScheduleModel.getDayOfWeeks();
                for(int i = 0; i < weeks.length; i++){
                    if(i == 0){
                        cronExp.append(weeks[i]);
                    } else{
                        cronExp.append(",").append(weeks[i]);
                    }
                }

            }

            //   
            else if(taskScheduleModel.getJobType().intValue() == 2){
                //        
                Integer[] days = taskScheduleModel.getDayOfMonths();
                for(int i = 0; i < days.length; i++){
                    if(i == 0){
                        cronExp.append(days[i]);
                    } else{
                        cronExp.append(",").append(days[i]);
                    }
                }
                //  
                cronExp.append(" * ");
                // 
                cronExp.append("?");
            }

        }
        else {
            System.out.println("          " );//          
        }
        return cronExp.toString();
    }

    /**
     *
     *    ：         
     *@param  taskScheduleModel
     *@return String
     */
    public static String createDescription(TaskScheduleModel taskScheduleModel){
        StringBuffer description = new StringBuffer("");
        //        
//      Date startTime = taskScheduleModel.getScheduleStartTime();

        if (null != taskScheduleModel.getSecond()
                && null != taskScheduleModel.getMinute()
                && null != taskScheduleModel.getHour()) {
            //   
            if(taskScheduleModel.getJobType().intValue() == 1){
                description.append("  ");
                description.append(taskScheduleModel.getHour()).append(" ");
                description.append(taskScheduleModel.getMinute()).append(" ");
                description.append(taskScheduleModel.getSecond()).append(" ");
                description.append("  ");
            }

            //   
            else if(taskScheduleModel.getJobType().intValue() == 3){
                if(taskScheduleModel.getDayOfWeeks() != null && taskScheduleModel.getDayOfWeeks().length > 0) {
                    String days = "";
                    for(int i : taskScheduleModel.getDayOfWeeks()) {
                        days += " " + i;
                    }
                    description.append("   ").append(days).append(" ");
                }
                if (null != taskScheduleModel.getSecond()
                        && null != taskScheduleModel.getMinute()
                        && null != taskScheduleModel.getHour()) {
                    description.append(",");
                    description.append(taskScheduleModel.getHour()).append(" ");
                    description.append(taskScheduleModel.getMinute()).append(" ");
                    description.append(taskScheduleModel.getSecond()).append(" ");
                }
                description.append("  ");
            }

            //   
            else if(taskScheduleModel.getJobType().intValue() == 2){
                //    
                if(taskScheduleModel.getDayOfMonths() != null && taskScheduleModel.getDayOfMonths().length > 0) {
                    String days = "";
                    for(int i : taskScheduleModel.getDayOfMonths()) {
                        days += i + " ";
                    }
                    description.append("   ").append(days).append(" ");
                }
                description.append(taskScheduleModel.getHour()).append(" ");
                description.append(taskScheduleModel.getMinute()).append(" ");
                description.append(taskScheduleModel.getSecond()).append(" ");
                description.append("  ");
            }

        }
        return description.toString();
    }

    //    
    public static void main(String[] args) {
        //    ：   12 12 12  start
        TaskScheduleModel taskScheduleModel = new TaskScheduleModel();

        taskScheduleModel.setJobType(0);//   
        taskScheduleModel.setSecond(30);
        String cronExp = createCronExpression(taskScheduleModel);
        System.out.println(cronExp);

        taskScheduleModel.setJobType(4);//    
        taskScheduleModel.setMinute(8);
        String cronExpp = createCronExpression(taskScheduleModel);
        System.out.println(cronExpp);

        taskScheduleModel.setJobType(1);//   
        Integer hour = 12; // 
        Integer minute = 12; // 
        Integer second = 12; // 
        taskScheduleModel.setHour(hour);
        taskScheduleModel.setMinute(minute);
        taskScheduleModel.setSecond(second);
        String cropExp = createCronExpression(taskScheduleModel);
        System.out.println(cropExp + ":" + createDescription(taskScheduleModel));
        //    ：   12 12 12  end

        taskScheduleModel.setJobType(3);//        
        Integer[] dayOfWeeks = new Integer[3];
        dayOfWeeks[0] = 1;
        dayOfWeeks[1] = 2;
        dayOfWeeks[2] = 3;
        taskScheduleModel.setDayOfWeeks(dayOfWeeks);
        cropExp = createCronExpression(taskScheduleModel);
        System.out.println(cropExp + ":" + createDescription(taskScheduleModel));

        taskScheduleModel.setJobType(2);//        
        Integer[] dayOfMonths = new Integer[3];
        dayOfMonths[0] = 1;
        dayOfMonths[1] = 21;
        dayOfMonths[2] = 13;
        taskScheduleModel.setDayOfMonths(dayOfMonths);
        cropExp = createCronExpression(taskScheduleModel);
        System.out.println(cropExp + ":" + createDescription(taskScheduleModel));

    }

}
 

package com.south.data.vo;

import com.baomidou.mybatisplus.extension.activerecord.Model;
import io.swagger.annotations.ApiModel;
import lombok.EqualsAndHashCode;
import lombok.Getter;
import lombok.Setter;
import lombok.experimental.Accessors;

/**
 * @Classname TaskScheduleModel
 * @Description TODO
 * @Date 2019/7/30 16:14
 * @Created by zhangzhenjun
 */
@ApiModel(description = "cron   ")
@Getter
@Setter
@Accessors(chain = true)
@EqualsAndHashCode(callSuper = true)
public class TaskScheduleModel extends Model<TaskScheduleModel> {

    /**
     *       :
     * 1  ->   
     * 2  ->   
     * 3  ->   
     */
    Integer jobType;

    /**      */
    Integer[] dayOfWeeks;

    /**       */
    Integer[] dayOfMonths;

    /**   */
    Integer second;

    /**   */
    Integer minute;

    /**   */
    Integer hour;

}