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springbatch介绍

视频地址:https://www.bilibili.com/video/BV1St411U7St

源码地址:https://gitee.com/vahala/springbatchlearn

学习笔记

1、instance:执行job失败后重试instance不变,成功了才变

2、execution:每次执行jbo都不一样,不管成功还是失败

3、读取文件的过程中的异常处理

itemStreamReader

(1)open:step开始之前

(2)update:一次chunk之后(成功后才执行)

(3)close:step执行结束后

4、数据库表batch_step_execution_context存储着作业的信息,一般执行过的作业就不再重复执行了,删除里面的记录就可以再次执行了

5、ItemReader:一个一个读取

ItemWriter:一批一批写(根据chunk来决定)

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