title: How to use FlatFileItemReader in spring batch for items separated by space (multiple records on single line)?
body: <p>Spring batch FlatFileItemReader supports two files formats by default, Fix length and delimiter separated. e.g</p>
  
  <pre><code>id name email 
  1  name1  name1@abc.com
  2  name2  name@abc.com
  </code></pre>
  
  <p>So it will consider each line as an item and fields as properties of item (domain) object. </p>
  
  <p>My input file has just ids separated by space or comma as I just need ids (or it could be anything unique for each item like username or email etc) e.g</p>
  
  <pre><code>1,2,3,4,5,6
  7,8,9, ...... so on
  </code></pre>
  
  <p>or </p>
  
  <pre><code>username1, username2, username3, username4 .. so on
  </code></pre>
  
  <p>How can I use FlatFileItemReader to consider each id as an each item i.e in short multiple records on single line ? Or is there any other way to achive this ?</p>