Bootsfaces,ajax,jsf和bean

时间:2018-01-23 13:21:21

标签: ajax jsf bootsfaces

我正在开展一个学校项目,我有一个前端项目和一个后端项目。 在我的前端项目中,我使用的是Bootsfaces 1.2.0版和jsf版。后端我有一个webservice和一个postgres数据库。

我正在尝试通过我的webservice通过我的前端项目中的表单添加对象(在本例中是汽车),并删除这些对象。我的问题是它有时只能工作(通常只有一次)。我尝试了很多不同的解决方案,并且还浏览了谷歌几天..

这是一些代码(简化)。

前端html-page:

            <b:dataTable value="#{leasingCarBean.carList}" var="car"
                id="carsTable">
                <b:dataTableColumn value="#{car.licensenumber}" />
                <b:dataTableColumn value="#{car.brand}" />
                <b:dataTableColumn value="#{car.model}" />
                <b:dataTableColumn value="#{car.color}" />
                <b:dataTableColumn value="#{car.year}" />
                <b:dataTableColumn label="Delete">
                    <b:commandButton value="Delete" onclick="ajax:leasingCarBean.deleteCar(car.licensenumber)" update="carsTable"/>
                </b:dataTableColumn>
            </b:dataTable>


            <b:button size="lg" look="info" value="New car" 
                onclick="$('.modalPseudoClass').modal();ajax:leasingCarBean.createNewCar()"
                />

            <b:modal id="amodal" title="New car" styleClass="modalPseudoClass">
                <h:form>
                    <b:inputText placeholder="Licensenumber"
                        value="#{leasingCarBean.newCar.licensenumber}" />
                    <b:inputText placeholder="Brand"
                        value="#{leasingCarBean.newCar.brand}" />
                    <b:inputText placeholder="Model"
                        value="#{leasingCarBean.newCar.model}" />
                    <b:inputText placeholder="Color"
                        value="#{leasingCarBean.newCar.color}" />
                    <b:inputText placeholder="Year"
                        value="#{leasingCarBean.newCar.year}" />
                </h:form>
                <f:facet name="footer">
                    <b:button value="Close" dismiss="modal" />
                    <b:commandButton value="Add" look="primary" dismiss="modal"
                        onclick="ajax:leasingCarBean.postNewCar()" update="carsTable" />
                </f:facet>
            </b:modal>

Backingbean前端

@Named
@ViewScoped
public class LeasingCarBean implements Serializable{
   private static final long serialVersionUID = 1L;

   private Cardto newCar;
   private Customerdto newCustomer;

   private WebTarget leasingCarTarget =  ClientBuilder.newClient().target("http://localhost:8080/leasingcarbackend/leasingcar");

   public LeasingCarBean() {}

   @PostConstruct
   public void init() {
       newCar = new Cardto();
       newCustomer = new Customerdto();
   }

   public List<Cardto> getCarList() {
       return leasingCarTarget.path("/carList").request(MediaType.APPLICATION_JSON).get(new GenericType<List<Cardto>>() {});
   }

   public void deleteCar(String licensenumber) {
    leasingCarTarget.path("/deleteCar/{licensenumber}").resolveTemplate("licensenumber", licensenumber).request(MediaType.APPLICATION_JSON).delete();
   }

   public void postNewCar() {
    leasingCarTarget.path("/newCar").request(MediaType.APPLICATION_JSON).post(Entity.json(newCar));
       newCar = null;
   }

   public void createNewCar() {
       newCar = new Cardto();
   }

   public Cardto getNewCar() {
       return newCar;
   }
}

我的一些错误:

  1. 当我添加汽车,然后单击删除按钮(在数据表中的任何汽车上)时,它会评估错误的EL表达式,leasingCarBean.newCar.licensenumber而不是leasingCarBean.deleteCar(car.licensenumber)

  2. 当我按下“新车”按钮时,它会在我按下“添加”按钮之前调用postNewCar方法,这意味着我得到空错误,因为我没有填写表格。

  3. 有时当我尝试添加新车时,即使填写了表格,我也会收到此错误:

    javax.el.PropertyNotFoundException: /admin/allCars.xhtml @100,57     
    value="#{leasingCarBean.newCar.licensenumber}": Target Unreachable, 'null' returned null
    
  4. 有关如何执行此操作的任何提示? 我将不胜感激任何帮助:)

    干杯!

1 个答案:

答案 0 :(得分:1)

所以,我解决了我的问题,如果其他人对解决方案感兴趣,我想在此发布。

我的html页面:

   //My datatable stays the same

            <b:dataTable value="#{leasingCarBean.carList}" var="car"
                id="carsTable">
                <b:dataTableColumn value="#{car.licensenumber}" />
                <b:dataTableColumn value="#{car.brand}" />
                <b:dataTableColumn value="#{car.model}" />
                <b:dataTableColumn value="#{car.color}" />
                <b:dataTableColumn value="#{car.year}" />
                <b:dataTableColumn label="Delete">
                    <b:commandButton value="Delete" onclick="ajax:leasingCarBean.deleteCar(car.licensenumber)" 
                    oncomplete="javascript:location.reload();"/>
                </b:dataTableColumn>
            </b:dataTable>


            <b:button size="lg" look="info" value="New car" 
                onclick="$('.modalPseudoClass').modal()" /> 
                //Took away createNewCar()

            <b:modal id="amodal" title="New car" styleClass="modalPseudoClass">
                <h:form>
                    <b:inputText placeholder="Licensenumber"
                        value="#{leasingCarBean.newCar.licensenumber}" />
                    <b:inputText placeholder="Brand"
                        value="#{leasingCarBean.newCar.brand}" />
                    <b:inputText placeholder="Model"
                        value="#{leasingCarBean.newCar.model}" />
                    <b:inputText placeholder="Color"
                        value="#{leasingCarBean.newCar.color}" />
                    <b:inputText placeholder="Year"
                        value="#{leasingCarBean.newCar.year}" />
                </h:form>
                <f:facet name="footer">
                    <b:button value="Close" dismiss="modal" />
                    <b:commandButton value="Add" look="primary"
                        onclick="$('.modalPseudoClass').modal('hide');ajax:leasingCarBean.postNewCar()" 
                       //Dismiss modal do not work for commandButton
                        update="carsTable" />
                </f:facet>
            </b:modal>

支持bean前端:

@Named
@ViewScoped
public class LeasingCarBean implements Serializable{
private static final long serialVersionUID = 1L;

private Cardto newCar;
private Customerdto newCustomer;

private WebTarget leasingCarTarget = ClientBuilder.newClient().target("http://localhost:8080/leasingcarbackend/leasingcar");

public LeasingCarBean() {}

@PostConstruct
public void init() {
    newCar = new Cardto();
    newCustomer = new Customerdto();
}

public List<Cardto> getCarList() {
    return leasingCarTarget.path("/carList").request(MediaType.APPLICATION_JSON).get(new GenericType<List<Cardto>>() {});
}

public void deleteCar(String licensenumber) {
    leasingCarTarget.path("/deleteCar/{licensenumber}").resolveTemplate("licensenumber", licensenumber).request(MediaType.APPLICATION_JSON).delete();
}

public void postNewCar() {
    leasingCarTarget.path("/newCar").request(MediaType.APPLICATION_JSON).post(Entity.json(newCar));
    newCar = new Cardto(); //Instead of = null
}

//This method is not needed anymore
public void createNewCar() {
    newCar = new Cardto();
}

public Cardto getNewCar() {
    return newCar;
}

希望这将有助于未来的某人:)