验证错误值无效

时间:2011-08-17 16:57:32

标签: jsf jpa primefaces

我知道这是一个常见的错误,并且有很多问题,但我必须创建一个新错误。

这是我的jsf页面:

<h:form id="clientCreatingForm">
    <p:selectOneMenu id="city" value="#{kkmBean.client.address.city}" style="width: 263px;" 
          converter="cityConveter" required="true" requiredMessage="You must choose one city">
          <f:selectItems value="#{kkmBean.cityList}" var="city" itemLabel="#{city.cityName}" itemValue="#{city.cityID}"/>
     </p:selectOneMenu>


     <p:commandButton value="Save client" type="button" onclick="confirm.show()" style="margin-top: 20px; margin-left: 30px; width: 180px;" />
     <p:commandButton value="Reset fields" type="reset" style="margin-top: 20px; margin-left: 30px; width: 180px;"/>

          <p:confirmDialog message="Are you sure, you want to save client?" 
               header="Save client" severity="info" widgetVar="confirm">

               <p:commandButton value="Yes, I am sure." oncomplete="confirm.hide()" 
                                         action="#{kkmBean.saveClient}" update=":warnings" style="font-size: 12px;"/>
               <p:commandButton value="No, I don't!" onclick="confirm.hide()" type="button" style="font-size: 12px;"/>
          </p:confirmDialog>
</h:form>

这是托管bean:

@ManagedBean(name = "kkmBean")
@SessionScoped
public class CreatingClientManager implements Serializable {

/** Creates a new instance of CreatingClientManager */
public KreiranjeKorisnikaManager() {
    client= new Client();
    client.setAddress(new Address());
    cityList = new LinkedList<City>();
    cityList = Communication.getInstance().getCitySessionBeanRemote().getCities();
  }

private Client client;
private List<City> cityList;

public String startCreatingClent() {

    return "creating-client";
  }

/**
 * @return the client
 */
public Klijent getClient() {
    return client;
  }

/**
 * @param client the client to set
 */
public void setClient(Client client) {
    this.Client = client;
  }

/**
 * @return the cityList
 */
public List<Grad> getCityList() {
    return cityList;
  }

/**
 * @param cityList the cityList to set
 */
public void setCityList(List<City> cityList) {
    this.cityList = cityList;
  }

public String saveClient() {
    System.out.println("i am in saveClient method");
    String message = Communication.getInstance().getClientSessionBeanRemote.saveClient(client);
    FacesContext context = FacesContext.getCurrentInstance();
    kontekst.addMessage(message, new FacesMessage(FacesMessage.SEVERITY_INFO, "Success: ", message));
    return null;
  }
}

最后转换器:

   @FacesConverter(forClass=City.class, value="cityConverter")
   public class CityConverter implements Converter {

   @Override
   public Object getAsObject(FacesContext context, UIComponent component, String value) {
      Integer cityID = Integer.valueOf(value);
      CreatingClientManager kkm = (CreatingClientManager) ((HttpSession)context.getExternalContext().getSession(true)).getAttribute("kkmBean");
      List<Grad> cityList = kkm.getCityList();
      for (int i = 0; i < cityList.size(); i++) {
          City city = cityList.get(i);
          if(city.getCityID().equals(cityID)) {
              System.out.println(city.getCityName());
              return city;
          }
      }
      return null;
  }

  @Override
  public String getAsString(FacesContext context, UIComponent component, Object value) {
      return value.toString();
  }
}

当然问题出在selectOneMenu上。当我提交表格时,我遇到了这个恼人的错误。

我正在调试转换器和返回grad之前的行,我打印grad.getImeGrada(),一切都很好,找到找到的城市(毕业)的名称(Ime)。我错过了什么吗?

P.S。抱歉我的英语,我希望你明白我的问题是什么。

几乎忘了提到我重写了equals和hashCode方法,我确信它没问题。

1 个答案:

答案 0 :(得分:10)

您指定itemValue的{​​{1}}并实施转换器<f:selectItems>的方式不正确。

提交所选值后,JSF会将getAsString()转换为cityID转换器的City。然后,JSF将针对getAsObject()的{​​{1}}验证City,看看它是否真的是列表的一部分(这是为了避免黑客修改/篡改具有不同值的请求)。但是,由于itemValue<f:selectItems> itemValue,因此对于列表中的每个项目,比较都会失败。因此cityID错误。

您需要将Integer更改为Value not valid,然后更改itemValue以返回City

getAsString()

cityID

总结:<p:selectOneMenu id="city" value="#{kkmBean.client.address.city}" style="width: 263px;" converter="cityConveter" required="true" requiredMessage="You must choose one city"> <f:selectItems value="#{kkmBean.cityList}" var="city" itemLabel="#{city.cityName}" itemValue="#{city}"/> </p:selectOneMenu> 的类型必须与下拉列表@Override public String getAsString(FacesContext context, UIComponent component, Object value) { City city = (City) value; return city.getCityID() != null ? String.valueOf(city.getCityID()) : null; } 完全相同,转换器必须在该类型和字符串之间进行转换。< / p>

另见: