上回说到，我们的设置页面已经做好了，接下来就是将时间转换为Unix Cron Expression。
2) 将时间转换为Unix Cron Expression
需要ActionForm将页面表单数据映射到Action中，然后在Action中转换为cron expression：
1 SchedulerForm. schedulerForm. = (SchedulerForm) form;2 String jobName = schedulerForm.getJobName();3 String cronExpression = "" ;4 String[] commonNeeds = {schedulerForm.getSecond(), schedulerForm.getMinute(), schedulerForm.getHour()} ;5 String[] monthlyNeeds = {schedulerForm.getWeek(), schedulerForm.getDayOfMonth()} ;6 String weeklyNeeds = schedulerForm.getDayOfWeek();7 String userDefinedNeeds = schedulerForm.getDate();8 String everyWhat = schedulerForm.getEveryWhat();9 // 得到时间规则10 cronExpression = CronExpConversion.getCronExpression(everyWhat, commonNeeds,11 monthlyNeeds, weeklyNeeds, userDefinedNeeds);12
我定义了一个 规则类来处理转换规则（写得不是很好 能用就行 嘿嘿）
1 2 /** */ /**3 * 页面设置转为UNIX cron expressions 转换类4 * CronExpConversion5 */6 public class CronExpConversion {7 8 /** */ /**9 * 页面设置转为UNIX cron expressions 转换算法10 * @param everyWhat11 * @param commonNeeds 包括 second minute hour12 * @param monthlyNeeds 包括 第几个星期 星期几13 * @param weeklyNeeds 包括 星期几14 * @param userDefinedNeeds 包括具体时间点15 * @return cron expression16 */17 public static String convertDateToCronExp(String everyWhat,18 String[] commonNeeds, String[] monthlyNeeds, String weeklyNeeds,19 String userDefinedNeeds) {20 String cronEx = "" ;21 String commons = commonNeeds[ 0 ] + " " + commonNeeds[ 1 ] + " "22 + commonNeeds[ 2 ] + " " ;23 String dayOfWeek = "" ;24 if ( " monthly " .equals(everyWhat)) {25 // eg.: 6#3 (day 6 = Friday and "#3" = the 3rd one in the26 // month)27 dayOfWeek = monthlyNeeds[ 1 ]28 + CronExRelated.specialCharacters29 .get(CronExRelated._THENTH) + monthlyNeeds[ 0 ];30 cronEx = (commons31 + CronExRelated.specialCharacters.get(CronExRelated._ANY)32 + " "33 + CronExRelated.specialCharacters.get(CronExRelated._EVERY)34 + " " + dayOfWeek + " " ).trim();35 } else if ( " weekly " .equals(everyWhat)) {36 dayOfWeek = weeklyNeeds; // 137 cronEx = (commons38 + CronExRelated.specialCharacters.get(CronExRelated._ANY)39 + " "40 + CronExRelated.specialCharacters.get(CronExRelated._EVERY)41 + " " + dayOfWeek + " " ).trim();42 } else if ( " userDefined " .equals(everyWhat)) {43 String dayOfMonth = userDefinedNeeds.split( " - " )[ 2 ];44 if (dayOfMonth.startsWith( " 0 " )) {45 dayOfMonth = dayOfMonth.replaceFirst( " 0 " , "" );46 }47 String month = userDefinedNeeds.split( " - " )[ 1 ];48 if (month.startsWith( " 0 " )) {49 month = month.replaceFirst( " 0 " , "" );50 }51 String year = userDefinedNeeds.split( " - " )[ 0 ];52 // FIXME 暂时不加年份 Quartz报错53 /**/ /* cronEx = (commons + dayOfMonth + " " + month + " "54 + CronExRelated.specialCharacters.get(CronExRelated._ANY)55 + " " + year).trim(); */56 cronEx = (commons + dayOfMonth + " " + month + " "57 + CronExRelated.specialCharacters.get(CronExRelated._ANY)58 + " " ).trim();59 }60 return cronEx;61 }62 }63
这样就将页面的时间设置转为了Cron Expression。
每一件事都要用多方面的角度来看它
