bean类：
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：
/**
* @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));
}
}