spring batch 学习笔记FlatFileItemReader class

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.