static public String listToJSONString(List<?> list) {
		if (list == null || list.size() == 0) {
			return "[]";
		}
		StringBuilder sb = new StringBuilder("[");
		for (Object o : list) {
			buildAppendString(sb, o).append(',').append(' ');
		}
		return sb.delete(sb.length() - 2, sb.length()).append(']').toString();
	}
static public String listToJSONString ( List < ? > list ) { if ( list == null || list . size ( ) == 0 ) { return "[]" ; } StringBuilder sb = new StringBuilder ( "[" ) ; for ( Object o : list ) { buildAppendString ( sb , o ) . append ( ',' ) . append ( ' ' ) ; } return sb . delete ( sb . length ( ) - 2 , sb . length ( ) ) . append ( ']' ) . toString ( ) ; }
List to json string string.

@param list the list
@return the string