How do i append query string from managed bean to url? JSF

Can this method work?

public String sayHello(){
    r开发者_如何学JAVAeturn "Hello.jsp?name=" + "laala";
}

I am unable to access, query string using the above method. I tried ${param.name} as well as request.getParameter("name"). They both return null. Please help!

Either fire a redirect..

public void sayHello(){
    ExternalContext externalContext = FacesContext.getCurrentInstance().getExternalContext();
    externalContext.redirect("/Hello.jsp?name=" + "laala");
}

.. or if you're already on JSF2, then just define them in navigation case:

<to-view-id>/Hello.jsp?name=#{bean.property}</to-view-id>

_{(although the .jsp file extension less or more hints that you're not on JSF2 yet)}

When using the JSF2 navigation case, if you want the new URL get reflected in the browser address bar, you need to add a <redirect/> entry, else it will just do a forward.

maybe this would help you. check out f:param with h:commandLink

http://balusc.blogspot.com/2006/06/communication-in-jsf.html