Java之定时任务的编写

Java要自动生成工单，需要编写定时任务。

可新建一个类：task/ScheduledTasks。

代码示例如下：

package com.cmit.kapok.system.task;

import com.cmit.kapok.constants.BusiConstants;
import com.cmit.kapok.system.api.miit_area.IMiitAreaService;
import com.cmit.kapok.system.api.miit_order.IMiitOrderService;
import com.cmit.kapok.system.api.miit_task_commit.IMiitTaskCommitService;
import com.cmit.kapok.system.entity.miit_task_commit.MiitTaskCommit;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.EnableScheduling;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.time.LocalDate;
import java.time.format.DateTimeFormatter;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;


@Component
@EnableScheduling
public class ScheduledTasks {
    private final Logger logger = LoggerFactory.getLogger(ScheduledTasks.class);
    @Autowired
    private IMiitOrderService miitOrderService;
    @Autowired
    private IMiitAreaService miitAreaService;
    @Autowired
    private IMiitTaskCommitService miitTaskCommitService;
    static DateTimeFormatter dtf= DateTimeFormatter.ofPattern("yyyy年MM月dd日");

    @Scheduled(cron ="0 54 15 * * ?")
    private void createTodayCommitTask(){
        logger.info("开始自动生成提交任务");
        List<String> areaCodeList = miitOrderService.queryTodayNeedSubmitAreaCode();
        if(null != areaCodeList && areaCodeList.size()>0){
            Map<String,String> areaMap = miitAreaService.mapOfAreaCode();
            List<MiitTaskCommit> list = new ArrayList<>();
            //新增提交任务
            for(String areaCode:areaCodeList){
                if(!areaMap.containsKey(areaCode)){
                    logger.error("areaCode="+areaCode+"无法转义，请联系管理员完善配置");
                    continue;
                }
                String areaName = areaMap.get(areaCode);
                String taskName = dtf.format(LocalDate.now())+areaName+"任务单";
                MiitTaskCommit task = new MiitTaskCommit(taskName, BusiConstants.TASK_COMMIT_STATUS_TODO,areaCode,areaName,"system");
                list.add(task);
            }
            miitTaskCommitService.insertForeach(list);
            //更新工单的提交任务ID
            for(MiitTaskCommit task:list){
                miitOrderService.updateTodayCommitOrder(task.getAreaCode(),task.getId());
            }
        }
        logger.info("提交任务生成结束");
    }
}

cron表达式格式：

{秒数} {分钟} {小时} {日期} {月份} {星期} {年份(可为空)}

“0 54 15 * * ?” 即每天15点54分0秒触发任务。