JobExecutionContext可以理解为Job实例的上下文，可以通过它获取job运行时的环境以及属性信息，一个Job对应一个JobExecutionContext的实例。当Scheduler调用一个Job时就会将JobExecutionContext传递给job的execute方法。
JobDataMap实现了Map接口，用法同Map类似，它可以装在任何可序列化的数据对象，执行Job时用来传递数据，JobDataMap存在JobExecutionContext中，要通过JobExecutionContext来获取。
创建测试方法，在JobDetail和Trigger中加入传输的数据
public class TestHelloJob2
{
public static void main( String[] args ) throws SchedulerException
{
/*创建JobDetail实例，并与HelloJob绑定；Job的名字是myjob，隶属于job_group组*/
JobDetail jobDetail = JobBuilder.newJob(HelloJob.class)
.withIdentity("myjob", "job_group")
.usingJobData("data1", "Data1 Information")
.usingJobData("data2", 10000D)
.build();
/*创建Trriger实例，指定Job每隔3秒钟执行一次*/
Trigger trigger = TriggerBuilder.newTrigger()
.withIdentity("mytrigger", "trigger_group")
.usingJobData("data2", 20000D)
.usingJobData("data3", "Data3 Information")
.startNow()
.withSchedule(SimpleScheduleBuilder.simpleSchedule()
.withIntervalInSeconds(3)
.repeatForever())
.build();
/*创建SchedulerFactory实例，把jobDetail与trigger绑定在一起*/
SchedulerFactory factory = new StdSchedulerFactory();
Scheduler scheduler = factory.getScheduler();
scheduler.start();
scheduler.scheduleJob(jobDetail, trigger);
}
}创建作业，实现Job接口，在job中获取传输的数据
public class HelloJob implements Job {
public void execute(JobExecutionContext context) throws JobExecutionException {
SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
System.out.println(sf.format(new Date()));
/*获取job的属性*/
JobKey key = context.getJobDetail().getKey();
System.out.println("Job name : " + key.getName() + "; Job group : " + key.getGroup());
/*获取Trigger的属性*/
TriggerKey tKey = context.getTrigger().getKey();
System.out.println("Trigger name : " + tKey.getName() + ": Trigger group : " + tKey.getGroup());
/*获取JobDetail中的DataMap中属性*/
JobDataMap dataMap = context.getJobDetail().getJobDataMap();
String jobData1 = dataMap.getString("data1");
Double jobData2 = dataMap.getDouble("data2");
System.out.println("jobData1 : " + jobData1 + " ; jobData2 : " + jobData2);
/*获取Trigger中的DataMap属性*/
JobDataMap tDataMap = context.getTrigger().getJobDataMap();
Double triggerData2 = tDataMap.getDouble("data2");
String triggerData3 = tDataMap.getString("data3");
System.out.println("triggerData2 : " + triggerData2 + "; triggerData3 : " + triggerData3);
System.out.println("This is hello job……");
System.out.println("------------------------------------------");
}
}运行测试方法，输出
2018-04-01 18:11:40
Job name : myjob; Job group : job_group
Trigger name : mytrigger: Trigger group : trigger_group
jobData1 : Data1 Information ; jobData2 : 10000.0
triggerData2 : 20000.0; triggerData3 : Data3 Information
This is hello job……
------------------------------------------
2018-04-01 18:11:43
Job name : myjob; Job group : job_group
Trigger name : mytrigger: Trigger group : trigger_group
jobData1 : Data1 Information ; jobData2 : 10000.0
triggerData2 : 20000.0; triggerData3 : Data3 Information
This is hello job……
……可见，在测试方法中放入的数据，在job中可以拿到。