How to get the value of another component in a custom validator? [duplicate]

Answer 1

You can just grab the other field's value from the request parameter map using the input field' name attribute. To get the name attribute of the input field do a view source to see what gets generated. See example below.

public void validate(FacesContext fc, UIComponent uic, Object o) throws ValidatorException {
    String newPassword = fc.getExternalContext().getRequestParameterMap().get("centerForm:newPassword");
    String newPassword2 = (String) o;
    if(!newPassword.equals(newPassword2)){
        FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_ERROR,"New Passwords do not match", null);            
        throw new ValidatorException(msg);            
    }
}