原来工作中有用到定时任务Quartz，不过是在MVC项目中，现在net core项目中也要用到，就开始改版。中间发现在网上的教程只有执行定时计划的过程，却很少有人写注册的过程，觉得有点略坑。所以写此文章一是自己做个记录，二是希望能帮助到其他人。后面还把此功能做出了多任务定时执行，网上关于net core的教程更是少了，花费了不少时间实现了出来。

Quartz版本：3.0.7

1.NuGet中下载安装Quartz

2.新建Quartz帮助类

 (1)新建QuartzJob类，代码如下：

public class QuartzJob : IJob    {        public async Task Execute(IJobExecutionContext context)        {            var jobKey = context.JobDetail.Key;//获取job信息            var triggerKey = context.Trigger.Key;//获取trigger信息            LogHelper.Info($"{DateTime.Now} QuartzJob:==>>自动执行.{jobKey.Name}|{triggerKey.Name}");            await Task.CompletedTask;        }    }

  ps： 上面代码中的jobKey和triggerKey可获取到自己定义的job和trigger的信息，这样做多任务时可区分要执行的是哪个任务. 另LogHelper.Info是自己封装好的日子记录类，可替换为自己的日志类

（2）新建QuartzFactory类，代码如下： 

public class QuartzFactory : IJobFactory    {        private readonly IServiceProvider _serviceProvider;        public QuartzFactory(IServiceProvider serviceProvider)        {            _serviceProvider = serviceProvider;        }        public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)        {            var jobDetail = bundle.JobDetail;            var job = (IJob)_serviceProvider.GetService(jobDetail.JobType);            return job;        }        public void ReturnJob(IJob job)        {        }    }

 （3）新建QuartzService类，代码如下：

#region 单任务        public static void StartJob
     
      () where TJob : IJob        {            var scheduler = new StdSchedulerFactory().GetScheduler().Result;            var job = JobBuilder.Create
      
       ()                .WithIdentity("job")                .Build();            var trigger1 = TriggerBuilder.Create()                .WithIdentity("job.trigger")                .StartNow()                .WithSimpleSchedule(x => x.WithInterval(TimeSpan.FromSeconds(5)).RepeatForever())                .ForJob(job)                .Build();            scheduler.AddJob(job, true);            scheduler.ScheduleJob(job, trigger1);            scheduler.Start();        }        #endregion        #region 多任务        public static void StartJobs
       
        () where TJob : IJob        {            var scheduler = new StdSchedulerFactory().GetScheduler().Result;            var job = JobBuilder.Create
        
         ()                .WithIdentity("jobs")                .Build();            var trigger1 = TriggerBuilder.Create()                .WithIdentity("job.trigger1")                .StartNow()                .WithSimpleSchedule(x => x.WithInterval(TimeSpan.FromSeconds(5)).RepeatForever())                .ForJob(job)                .Build();            var trigger2 = TriggerBuilder.Create()                .WithIdentity("job.trigger2")                .StartNow()                .WithSimpleSchedule(x => x.WithInterval(TimeSpan.FromSeconds(11)).RepeatForever())                .ForJob(job)                .Build();            var dictionary = new Dictionary
         
          >            {                {job, new HashSet
          
            {trigger1, trigger2}} }; scheduler.ScheduleJobs(dictionary, true); scheduler.Start(); } #endregion #region 配置 public static void AddQuartz(this IServiceCollection services, params Type[] jobs) { services.AddSingleton
           
            (); services.Add(jobs.Select(jobType => new ServiceDescriptor(jobType, jobType, ServiceLifetime.Singleton))); services.AddSingleton(provider => { var schedulerFactory = new StdSchedulerFactory(); var scheduler = schedulerFactory.GetScheduler().Result; scheduler.JobFactory = provider.GetService
            
             (); scheduler.Start(); return scheduler; }); } #endregion
            
           
          
         
        
       
      
     

3.在Startup.cs中注册代码

public void ConfigureServices(IServiceCollection services){            services.AddQuartz(typeof(QuartzJob));            //........}public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory){    QuartzService.StartJobs
     
      ();    //........}
     

 ps: 因AddQuartz方法定义的是Type[]类型，所以可传多个执行类，如：services.AddQuartz(typeof(QuartzJob1), typeof(QuartzJob2)); 不过这样做StartJob()方法就得另处理下，这里就略过

 

OK，大功告成，这个东西折腾了两天终于尘埃落定了，执行结果如下：