1:首先创建一个WebAPi

代码地址:Quartz代码

 2:安装Quartz

 3:创建文件夹和文件

 4:复制代码

 复制以后 看代码注释解释

JobFactory:

    /// 

    /// 工作工厂
    /// 
    public class JobFactory : IJobFactory
    {
        private readonly IServiceProvider _serviceProvider;

        /// 

        /// 构造注入
        /// 
        /// 
        public JobFactory(IServiceProvider serviceProvider) => _serviceProvider = serviceProvider;

        /// 

        /// 创建一个指定类型的job
        /// 
        /// 
        /// 
        /// 
        public IJob NewJob(TriggerFiredBundle bundle, IScheduler scheduler)
        {
            // 获得一个ioc对象，指定创建scope级别的实例
            // 不写的话，默认是单例。
            var serviceScope = _serviceProvider.CreateScope();
            // 依赖注入一个 job 然后返回
            return serviceScope.ServiceProvider.GetService(bundle.JobDetail.JobType) as IJob;
        }

        public void ReturnJob(IJob job)
        {
        }

JobSchedule:

    /// 

    /// 任务计划表
    /// 
    public class JobSchedule
    {
        public JobSchedule(Type jobType, string cronExpression)
        {
            JobType = jobType;
            CronExpression = cronExpression;
        }

        /// 

        /// 作业类型
        /// 
        public Type JobType { get; }

        /// 

        /// cron 表达式
        /// 
        public string CronExpression { get; }
    }

QuartzHostedService:

    /// 

    /// quartz 主机服务
    /// 
    [DisallowConcurrentExecution]
    public class QuartzHostedService : IHostedService //IHostedService 主机中注册托管服务
    {
        /// 

        /// 定时作业计划生成工厂
        /// 
        private readonly ISchedulerFactory _schedulerFactory;

        /// 

        /// 定时作业工厂
        /// 
        private readonly IJobFactory _jobFactory;

        /// 

        /// 定时作业计划集合，配合dotnet core的ioc注入进来
        /// 
        private readonly IEnumerable _jobSchedules;

        /// 

        /// 日志
        /// 
        private readonly ILogger _logger;

        /// 

        /// quartz 调度器
        /// 
        private IScheduler _scheduler;

        /// 

        /// 构造注入
        /// 
        /// 
        /// 
        /// 
        /// 
        public QuartzHostedService(ISchedulerFactory schedulerFactory, IJobFactory jobFactory, IEnumerable jobSchedules, ILogger logger)
        {
            _schedulerFactory = schedulerFactory;
            _jobFactory = jobFactory;
            _jobSchedules = jobSchedules;
            _logger = logger;
        }

        /// 

        /// 批量启动定时任务
        /// 
        /// 
        /// 
        public async Task StartAsync(CancellationToken cancellationToken)
        {
            _scheduler = await _schedulerFactory.GetScheduler(cancellationToken);
            _scheduler.JobFactory = _jobFactory;
            // 判断有没有记录，有的话，quartz会自动提取信息创建 schedule
            foreach (var jobs in _jobSchedules)
            {
                var a = await _scheduler.CheckExists(new JobKey(GenerateIdentity(jobs, IdentityType.Job)));
                var b = await _scheduler.CheckExists(new TriggerKey(GenerateIdentity(jobs, IdentityType.Trigger)));
                if (!a && !b)
                {
                    //创建定时作业
                    var job = CreateJob(jobs);
                    //创建触发器
                    var trigger = CreateTrigger(jobs);
                    await _scheduler.ScheduleJob(job, trigger, cancellationToken);
                }
            }
            await _scheduler.Start();
        }

        /// 

        /// 创建触发器
        /// 
        /// 
        /// 
        private static ITrigger CreateTrigger(JobSchedule schedule)
        {
            return TriggerBuilder
                .Create()
                .WithIdentity(GenerateIdentity(schedule, IdentityType.Trigger))
                .WithCronSchedule(schedule.CronExpression)
                .WithDescription(schedule.JobType.FullName)
                .Build();
        }

        /// 

        /// 创建定时作业
        /// 
        /// 
        /// 
        private static IJobDetail CreateJob(JobSchedule schedule)
        {
            return JobBuilder.Create(schedule.JobType).WithIdentity(GenerateIdentity(schedule, IdentityType.Job)).WithDescription(schedule.CronExpression).Build();
        }

        /// 

        /// 停止
        /// 
        /// 
        /// 
        public Task StopAsync(CancellationToken cancellationToken)
        {
            throw new NotImplementedException();
        }

        /// 

        /// 生成一个标识
        /// 
        /// 
        /// 标识类型，一个job作业，或者是trigger触发器
        /// 
        private static string GenerateIdentity(JobSchedule schedule, IdentityType identityType)
        {
            switch (identityType)
            {
                case IdentityType.Job:
                    return $"NdcPayInternal_Job_{schedule.JobType.Name}";

                case IdentityType.Trigger:
                    return $"NdcPayInternal_Trigger_{schedule.JobType.Name}";
            }

            return schedule.JobType.FullName;
        }

        /// 

        /// 标识类型
        /// 
        private enum IdentityType
        {
            Job,
            Trigger
        }
    }

Program:

//任务计划
//-------------------------------------
builder.Services.AddHostedService();
builder.Services.AddSingleton();
builder.Services.AddSingleton();
//-------------------------------------

MyJob1:

 public class MyJob1 : IJob
    {
        /// 

        /// 日志
        /// 
        private readonly ILogger _logger;

        /// 

        /// 日志引擎 ILogger
        /// 
        /// 
        public MyJob1(ILogger logger)
            => _logger = logger;

        public Task Execute(IJobExecutionContext context)
        {
            _logger.LogInformation(DateTime.Now.ToString() + "  执行了我，我是 【job1】");

            return Task.CompletedTask;
        }
    }

MyJob2:

    /// 

    /// 工作日志
    /// 
    public class MyJob2 : IJob
    {
        private readonly ILogger logger;

        public MyJob2(ILogger _logger) => logger = _logger;

        public Task Execute(IJobExecutionContext context)
        {
            //设置信息日志消息格式并写入该消息。
            logger.LogInformation(DateTime.Now.ToString() + "  执行了我，我是 【job2】");

            return Task.CompletedTask;
        }
    }

Program:

// 请求获取-（GC回收-主动释放） 每一次获取的对象都不是同一个
builder.Services.AddTransient();
builder.Services.AddTransient(u => new JobSchedule(jobType: typeof(MyJob1), cronExpression: "0/10 * * * * ?"));
builder.Services.AddTransient();
builder.Services.AddTransient(u => new JobSchedule(jobType: typeof(MyJob2), cronExpression: "0/15 * * * * ?"));
//-------------------------------------

5:进行调试并查看控制台