public static String exec(String tmpl, NutBean context, boolean showKey) {
        return exec(tmpl, null, -1, -1, null, context, showKey);
    }
public static String exec ( String tmpl , NutBean context , boolean showKey ) { return exec ( tmpl , null , - 1 , - 1 , null , context , showKey ) ; }
@see #exec(String, Pattern, int, int, NutBean, boolean)