Question

我有以下评级代码：

<h:form>
    <p:growl id="messages" showDetail="true"></p:growl>
       <h:outputLabel value="Rating:" />
        <p:rating value = "#{ratingBean.rating}" stars="5"  rendered="true">
           <p:ajax event="rate" listener="#{ratingBean.onrate}" update="messages" />  
    </p:rating>
</h:form>

我的支持bean是这样的：

package backupController;

import java.io.Serializable;

import javax.enterprise.context.RequestScoped;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.inject.Named;

import org.primefaces.event.RateEvent;


@Named
@RequestScoped
public class RatingBean implements Serializable {


    /**
     * 
     */
    private static final long serialVersionUID = 1L;

    public Integer getRating() {
        System.out.println("You Rated: "+ rating);
        return rating;

    }

    public void setRating(Integer rating) {
        this.rating = rating;
        System.out.println("You Rated re:");

    }


  public void onrate(RateEvent rateEvent) {  
      FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, "Rate Event", "You rated:" + ((Integer) rateEvent.getRating()).intValue());  

      FacesContext.getCurrentInstance().addMessage(null, message);  
  } 

//    public void oncancel() {  
//        FacesMessage message = new FacesMessage(FacesMessage.SEVERITY_INFO, "Cancel Event", "Rate Reset");  
//  
//        FacesContext.getCurrentInstance().addMessage(null, message);  
//    }  

    private Integer rating;

}

我收到的信息是我评价的，但在控制台中，该值被评为空。显示我的xhtml页面上的信息以及评级，但bean没有读取值。

Answer 1

RequestScoped的宽度不足以达到您想要达到的效果。对于您发出新请求的每个速率，都会将其发送到Web服务器，因此会创建新的请求范围bean。尝试查看scoped bean

Primefaces评级，额定值不传递给支持bean

1 个答案: