Chapter 7. Readers
The three R's, Reading, wRiting and aRithmetic, are considered the basis of the skills children learn in schools. When you think about it, these same concepts apply to software as well. The foundations of any programs—whether web applications, batch jobs, or anything else—are the input of data, the processing of it in some way, and the output of data.
This concept is no more obvious than when you use Spring Batch. Each step consists of an ItemReader, an ItemProcessor, and an ItemWriter. Reading in any system isn't always straight forward, however. There are a number of different formats in which input can be provided; flat files, XML, and databases are just some of the potential input sources.
Spring Batch provides standard ways ...
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