Redirect before loading the page in JSF2 [duplicate]

Answer 1

When on JSF 2.2, you can use for this.

(paramName is the name of your query string parameter)

private String paramName; // +getter+setter

public String check() {
    if (paramName == null) {
        return "error.xhtml";
    }

    return null;
}

When not on JSF 2.2 yet (JSF 2.0/2.1), you can use for this.

private String paramName; // +getter+setter

public void check() throws IOException {
    if (paramName == null) {
        FacesContext.getCurrentInstance().getExternalContext().redirect("error.xhtml");
    }
}

See also:

• What can , and be used for?