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java生成cron表达式

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bean类：

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package com.cst.klocwork.service.cron;
 
public class TaskScheduleModel { 
     
     
    /**
        * 所选作业类型: 
        * 1  -> 每天 
        * 2  -> 每月 
        * 3  -> 每周
        * 4  ->间隔（每隔2个小时，每隔30分钟）
        */ 
    Integer jobType; 
       
    /**一周的哪几天*/ 
    Integer[] dayOfWeeks; 
       
    /**一个月的哪几天*/ 
    Integer[] dayOfMonths; 
       
    /**秒  */ 
    Integer second; 
       
    /**分  */ 
    Integer minute; 
       
    /**时  */ 
    Integer hour;    
   
    public Integer getJobType() { 
        return jobType; 
    } 
   
    public void setJobType(Integer jobType) { 
        this.jobType = jobType; 
    } 
       
    public Integer[] getDayOfWeeks() { 
        return dayOfWeeks; 
    } 
   
    public void setDayOfWeeks(Integer[] dayOfWeeks) { 
        this.dayOfWeeks = dayOfWeeks; 
    }    
   
    public Integer[] getDayOfMonths() { 
        return dayOfMonths; 
    } 
   
    public void setDayOfMonths(Integer[] dayOfMonths) { 
        this.dayOfMonths = dayOfMonths; 
    } 
   
    public Integer getSecond() { 
        return second; 
    } 
   
    public void setSecond(Integer second) { 
        this.second = second; 
    } 
   
    public Integer getMinute() { 
        return minute; 
    } 
   
    public void setMinute(Integer minute) { 
        this.minute = minute; 
    } 
   
    public Integer getHour() { 
        return hour; 
    } 
   
    public void setHour(Integer hour) { 
        this.hour = hour; 
    } 
       
       
} 

　　util类：

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/** 
 * @ClassName: CronUtil 
 * @Description: Cron表达式工具类 
 * 目前支持三种常用的cron表达式
 * 1.每天的某个时间点执行 例:12 12 12 * * ?表示每天12时12分12秒执行
 * 2.每周的哪几天执行         例:12 12 12 ? * 1,2,3表示每周的周1周2周3 ,12时12分12秒执行
 * 3.每月的哪几天执行         例:12 12 12 1,21,13 * ?表示每月的1号21号13号 12时12分12秒执行
 * @author 
 * @date 
 * 
 */   
public class CronUtil {   
         
         
       
    /** 
     *  
     *方法摘要：构建Cron表达式 
     *@param  taskScheduleModel 
     *@return String 
     */   
    public static String createCronExpression(TaskScheduleModel taskScheduleModel){   
        StringBuffer cronExp = new StringBuffer("");   
           
        if(null == taskScheduleModel.getJobType()) { 
            System.out.println("执行周期未配置" );//执行周期未配置 
        } 
           
        if (null != taskScheduleModel.getSecond() 
                && null != taskScheduleModel.getMinute() 
                && null != taskScheduleModel.getHour()) {   
            //秒   
            cronExp.append(taskScheduleModel.getSecond()).append(" ");   
            //分   
            cronExp.append(taskScheduleModel.getMinute()).append(" ");   
            //小时   
            cronExp.append(taskScheduleModel.getHour()).append(" ");   
                 
            //每天   
            if(taskScheduleModel.getJobType().intValue() == 1){   
                cronExp.append("* ");//日 
                cronExp.append("* ");//月 
                cronExp.append("?");//周 
            } 
                 
            //按每周   
            else if(taskScheduleModel.getJobType().intValue() == 3){   
                //一个月中第几天   
                cronExp.append("? ");   
                //月份   
                cronExp.append("* ");   
                //周   
                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]);   
                    }   
                }   
                     
            }   
                 
            //按每月   
            else if(taskScheduleModel.getJobType().intValue() == 2){   
                //一个月中的哪几天   
                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]);   
                    }   
                }   
                //月份   
                cronExp.append(" * ");   
                //周   
                cronExp.append("?");   
            }   
                 
        }   
        else { 
            System.out.println("时或分或秒参数未配置" );//时或分或秒参数未配置 
        } 
        return cronExp.toString();   
    }   
         
    /** 
     *  
     *方法摘要：生成计划的详细描述 
     *@param  taskScheduleModel 
     *@return String 
     */   
    public static String createDescription(TaskScheduleModel taskScheduleModel){   
        StringBuffer description = new StringBuffer("");   
        //计划执行开始时间   
//      Date startTime = taskScheduleModel.getScheduleStartTime();   
             
        if (null != taskScheduleModel.getSecond() 
                && null != taskScheduleModel.getMinute() 
                && null != taskScheduleModel.getHour()) {  
            //按每天   
            if(taskScheduleModel.getJobType().intValue() == 1){   
                description.append("每天");   
                description.append(taskScheduleModel.getHour()).append("时");   
                description.append(taskScheduleModel.getMinute()).append("分");   
                description.append(taskScheduleModel.getSecond()).append("秒");   
                description.append("执行");   
            }   
                 
            //按每周   
            else if(taskScheduleModel.getJobType().intValue() == 3){   
                if(taskScheduleModel.getDayOfWeeks() != null && taskScheduleModel.getDayOfWeeks().length > 0) {   
                    String days = ""; 
                    for(int i : taskScheduleModel.getDayOfWeeks()) { 
                        days += "周" + i; 
                    } 
                    description.append("每周的").append(days).append(" ");   
                }   
                if (null != taskScheduleModel.getSecond() 
                        && null != taskScheduleModel.getMinute() 
                        && null != taskScheduleModel.getHour()) {    
                    description.append(",");    
                    description.append(taskScheduleModel.getHour()).append("时");   
                    description.append(taskScheduleModel.getMinute()).append("分");   
                    description.append(taskScheduleModel.getSecond()).append("秒");  
                }   
                description.append("执行");   
            }   
                 
            //按每月   
            else if(taskScheduleModel.getJobType().intValue() == 2){   
                //选择月份   
                if(taskScheduleModel.getDayOfMonths() != null && taskScheduleModel.getDayOfMonths().length > 0) {   
                    String days = ""; 
                    for(int i : taskScheduleModel.getDayOfMonths()) { 
                        days += i + "号"; 
                    } 
                    description.append("每月的").append(days).append(" ");   
                }     
                description.append(taskScheduleModel.getHour()).append("时");   
                description.append(taskScheduleModel.getMinute()).append("分");   
                description.append(taskScheduleModel.getSecond()).append("秒");  
                description.append("执行");   
            }   
                 
        }   
        return description.toString();   
    } 
       
    //参考例子 
    public static void main(String[] args) { 
        //执行时间：每天的12时12分12秒 start 
        TaskScheduleModel taskScheduleModel = new TaskScheduleModel(); 
        taskScheduleModel.setJobType(1);//按每天 
        Integer hour = 12; //时 
        Integer minute = 12; //分 
        Integer second = 12; //秒 
        taskScheduleModel.setHour(hour); 
        taskScheduleModel.setMinute(minute); 
        taskScheduleModel.setSecond(second); 
        String cropExp = createCronExpression(taskScheduleModel); 
        System.out.println(cropExp + ":" + createDescription(taskScheduleModel)); 
        //执行时间：每天的12时12分12秒 end 
           
        taskScheduleModel.setJobType(3);//每周的哪几天执行 
        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);//每月的哪几天执行 
        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)); 
           
    } 
} 

　　

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