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36 lines
1.3 KiB
Markdown
36 lines
1.3 KiB
Markdown
JobDataMap
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https://blog.csdn.net/qq_30859353/article/details/120533838
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JobDataMap中可以包含不限量的（序列化的）数据对象，在job实例执行的时候，可以使用其中的数据；JobDataMap是Java Map接口的一个实现，额外增加了一些便于存取基本类型的数据的方法。
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将job加入到scheduler之前，在构建JobDetail时，可以将数据放入JobDataMap，如下示例：
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```
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// define the job and tie it to our DumbJob class
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JobDetail job = newJob(DumbJob.class)
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.withIdentity("myJob", "group1") // name "myJob", group "group1"
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.usingJobData("jobSays", "Hello World!")
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.usingJobData("myFloatValue", 3.141f)
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.build();
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在job的执行过程中，可以从JobDataMap中取出数据，如下示例：
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public class DumbJob implements Job {
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public DumbJob() {
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}
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public void execute(JobExecutionContext context)
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throws JobExecutionException
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{
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JobKey key = context.getJobDetail().getKey();
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JobDataMap dataMap = context.getJobDetail().getJobDataMap();
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String jobSays = dataMap.getString("jobSays");
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float myFloatValue = dataMap.getFloat("myFloatValue");
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System.err.println("Instance " + key + " of DumbJob says: " + jobSays + ", and val is: " + myFloatValue);
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}
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}
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``` |