spring batch 学习笔记FlatFileItemReader class

最新推荐文章于 2024-07-15 00:06:55 发布

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最新推荐文章于 2024-07-15 00:06:55 发布

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分类专栏： xml;spring 文章标签： spring batch

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本文介绍了FlatFileItemReader类使用的三个接口：RecordSeparatorPolicy用于识别数据行；LineMapper负责从行中提取数据；LineCallbackHandler处理特殊情况下数据行。重点讨论了DefaultLineMapper及其组成部分LineTokenizer如何将数据行拆分为令牌，以及FileSetMapper如何从令牌创建数据对象。

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FlatFileItemReader class　use three interface see the below pitcture

the RecordSeparatorPolicy interface is used to indentify the data from lines; while LineMapper is resposible for extracting data from lines; and LineCallbackHandler interface handle the

data lines in a special case;

in the LineMapper interface , DefaultLineMapper is the most used and default class to implements the LineMapper interface;

and the DefaultLineMapper holds LineTokenizer interface is to split the data lines into the tokens. and FileSetMapper is to create the data objects from the tokens.