java - How to group rows in htmldatatable? -

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How to group rows in htmldatatable? I am using JSF.

A small example: 

  Tronjham Tronsmount invoice Num Invoismount 1 50 1 10 1 50 2 15 1 50 3 30 2 10 1 6 2 If I "Invoisnm so I choose the grouping column as "table should look as follows: - (ie Inhoisan are groupings): 
  
  Tronsanm Tronsmount invoice Neuve Invoismount 1 1 50 1 10 2 10 1 6 2 1 50 2 15 2 10 2 5 3 1 50 3 30   
 Transmutation Transmount Invoice News Invite Shri way, the group can be   
 
 
 JSF   
 code> H: Detatebl  is not a built-in group  
 or if you fit into one component libraries can find a component for your needs, such as, or.  
 Or you have to sort the list and implement it in the backing bean the way you want it.

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