protected static String generateQueryString ( Map < String , Object > parameters ) { if ( parameters == null || parameters . size ( ) == 0 ) { return "" ; } StringBuilder result = new StringBuilder ( ) ; try { for ( Map . Entry < String , Object > entry : parameters . entrySet ( ) ) { // Check to see if the key/value isn't null or empty string if ( entry . getKey ( ) != null && ( entry . getValue ( ) != null && ! entry . getValue ( ) . toString ( ) . equals ( "" ) ) ) { result . append ( ' ' ) . append ( URLEncoder . encode ( entry . getKey ( ) , "utf-8" ) ) . append ( "=" ) . append ( URLEncoder . encode ( entry . getValue ( ) . toString ( ) , "utf-8" ) ) ; } } } catch ( UnsupportedEncodingException e ) { throw new RuntimeException ( e ) ; } return result . length ( ) == 0 ? "" : "?" + result . substring ( 1 ) ; }
Returns a query string .