FacesContext facesContext = FacesContext.getCurrentInstance();
HttpServletRequest request = (HttpServletRequest) facesContext.getExternalContext().getRequest();
String value = request .getParameter("id");
HttpServletRequest request = (HttpServletRequest) facesContext.getExternalContext().getRequest();
String value = request .getParameter("id");
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String id = request.getParameter("id");
当然也可以通过页面隐藏域来实现