获取JSF完整网址

Question

对不起，如果有人问过，我找不到。

我有以下链接：

http://www.mysite.kg/news/news.xhtml?id=2

如何在问号后获取值，例如来自URL的id = 2

Answer 1

我猜这解决了：

        FacesContext context = FacesContext.getCurrentInstance();
        HttpServletRequest req = (HttpServletRequest) context.getExternalContext().getRequest();
        String url = req.getRequestURL().toString();
        String id = "";

        Pattern pattern = Pattern.compile( "id=(\\d+)" );
        Matcher matcher = pattern.matcher( url );
        if ( matcher.find() )
            id = matcher.group( 1 );