question: public String parse ( File file , JSON m ) { try { Template template = getTemplate ( file ) ; if ( template != null ) { StringWriter w = new StringWriter ( ) ; BufferedWriter writer = new BufferedWriter ( w ) ; template . merge ( new VelocityContext ( m ) , writer ) ; writer . flush ( ) ; writer . close ( ) ; return w . toString ( ) ; } } catch ( Exception e ) { log . error ( e . getMessage ( ) , e ) ; } return null ; }
target:  parse the file to string with the json