jsf - CDI bean 构造函数和@PostConstruct 多次调用

Question

经过一些实验，这在使用 CDI bean 时似乎是一个问题，与我最初假设的 PrimeFaces 无关。

如果我使用@ManagedBean 将 TableBeanLazy 更改为托管 Bean，那么构造函数和 @PostConstruct 方法只会被调用一次，正如我所期望的。

任何人都可以对此有所了解吗？

================================================== =

我对 JSF 和 PrimeFaces 还很陌生，因此将不胜感激任何指导。我搜索了其他帖子，并阅读了许多类似的帖子，但找不到解决方案。

我正在尝试让 PrimeFaces Showcase 站点上的延迟加载数据表示例在我的项目中工作，但由于 bean 类的行为不符合我的预期，我遇到了问题。

我对来自 PrimeFaces 站点的示例代码进行了一些更改:- 将 TableBean 类重命名为 TableBeanLazy；为类添加了注释；分配的静态字符串数组；将初始化从构造函数移至 @PostConstruct initialise() 方法；分配了汽车成员变量。

我还向构造函数和 @PostConstruct 方法添加了跟踪消息，这表明在首次显示表时多次调用这两者，每次单击搜索图标时多次调用，以及在每个字符条目中多次调用过滤字段。

这会导致每次执行操作时都会重新创建 Car 对象的随机列表，因此排序和过滤器永远不会产生预期的结果 - 它们在 PrimeFaces Showcase 站点上直接运行示例时会这样做。

虽然我最初使用的是@ViewScoped，但我也尝试过@RequestScoped 和最后的@SessionScoped，但都以相同的方式运行。

对构造函数和 @PostConstruct 的多次调用是否是 bean 的预期行为？

如果是这样，PrimeFaces Showcase 站点上给出的示例代码如何工作？

我该如何解决？

环境

PrimeFaces 3.5
JSF 2.1
JDK 1.7
GlassFish Server Open Source Edition 3.1.2.2 (build 5)
Mojarra 2.1.6 (SNAPSHOT 20111206)
Netbeans IDE 7.3
Windows 7 Pro x64

MyTable.xhtml

<?xml version='1.0' encoding='UTF-8' ?>
<!DOCTYPE composition PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<ui:composition xmlns="http://www.w3.org/1999/xhtml"
  xmlns:ui="http://java.sun.com/jsf/facelets"
  template="./resources/templates/platform_tpl.xhtml"
  xmlns:p="http://primefaces.org/ui"
  xmlns:h="http://java.sun.com/jsf/html"
  xmlns:f="http://java.sun.com/jsf/core">

  <ui:define name="body">
    <h2 style="margin-top: 0px; padding-top: 0px;">Cars List</h2>

    <h:form id="form">
      <p:dataTable var="car" value="#{tableBeanLazy.lazyModel}" paginator="true" rows="10"
        paginatorTemplate="{RowsPerPageDropdown} {FirstPageLink} {PreviousPageLink} {CurrentPageReport} {NextPageLink} {LastPageLink}"
        rowsPerPageTemplate="5,10,15" selectionMode="single" selection="#{tableBeanLazy.selectedCar}" id="carTable" lazy="true">

      <p:column headerText="Model" sortBy="#{car.model}" filterBy="#{car.model}">
        <h:outputText value="#{car.model}" />
      </p:column>

      <p:column headerText="Year" sortBy="#{car.year}" filterBy="#{car.year}">
        <h:outputText value="#{car.year}" />
      </p:column>

      <p:column headerText="Manufacturer" sortBy="#{car.manufacturer}" filterBy="#{car.manufacturer}">
        <h:outputText value="#{car.manufacturer}" />
      </p:column>

      <p:column headerText="Color" sortBy="#{car.color}" filterBy="#{car.color}">
        <h:outputText value="#{car.color}" />
      </p:column>
      </p:dataTable>
    </h:form> 
  </ui:define>
</ui:composition>

TableBeanLazy.java

/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */
package BackEnd;

import java.util.ArrayList;
import java.util.List;  
import javax.annotation.PostConstruct;
import javax.faces.bean.SessionScoped;
import javax.inject.Named;

import org.primefaces.model.LazyDataModel;  

@Named(value = "tableBeanLazy")
@SessionScoped
public class TableBeanLazy
{
  static String[] colors = new String[10];
  static String[] manufacturers = new String[10];
  static String[] models = new String[5];

  private LazyDataModel<Car> lazyModel;  

  private Car selectedCar;  

  private List<Car> cars;  

  static
  {
    colors[0] = "Black";  
    colors[1] = "White";  
    colors[2] = "Green";  
    colors[3] = "Red";  
    colors[4] = "Blue";  
    colors[5] = "Orange";  
    colors[6] = "Silver";  
    colors[7] = "Yellow";  
    colors[8] = "Brown";  
    colors[9] = "Maroon";  

    manufacturers[0] = "Mercedes";  
    manufacturers[1] = "BMW";  
    manufacturers[2] = "Volvo";  
    manufacturers[3] = "Audi";  
    manufacturers[4] = "Renault";  
    manufacturers[5] = "Opel";  
    manufacturers[6] = "Volkswagen";  
    manufacturers[7] = "Chrysler";  
    manufacturers[8] = "Ferrari";  
    manufacturers[9] = "Ford";

    models[0] = "Sports";
    models[1] = "Saloon";
    models[2] = "SUV";
    models[3] = "Hybrid";
    models[4] = "Estate";
  }  

  public TableBeanLazy()
  {
    System.out.println("-->  In constructor for TableBeanLazy");
  }

  @PostConstruct
  public void initialise()
  {
    System.out.println("-->  In initialise for TableBeanLazy");

    cars = new ArrayList<Car>();

    populateRandomCars(cars, 5);

    lazyModel = new LazyCarDataModel(cars);  
  }

  public Car getSelectedCar()
  {
    return selectedCar;
  }  

  public void setSelectedCar(Car selectedCar)
  {
    this.selectedCar = selectedCar;
  }

  public LazyDataModel<Car> getLazyModel()
  {
    return lazyModel;
  }

  private void populateRandomCars(List<Car> list, int size)
  {
    System.out.println("-->  In populateRandomCars for TableBeanLazy");

    for(int i = 0 ; i < size ; i++)
    {
      list.add(new Car(getRandomModel(), getRandomYear(), getRandomManufacturer(), getRandomColor()));  
    }  
  }  

  private String getRandomColor()
  {
    return colors[(int)(Math.random() * 10)];
  }

  private String getRandomManufacturer()
  {
    return manufacturers[(int) (Math.random() * 10)];
  }

  private String getRandomModel()
  {
    return models[(int)(Math.random() * 5)];
  }

  private int getRandomYear()
  {
    return (int)(Math.random() * 50 + 1960);
  }
}

表初始显示时的输出

INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy

单击搜索图标时的输出

INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: java.lang.ArithmeticException: / by zero
java.lang.ArithmeticException: / by zero
  at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
  at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
  at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
  at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
  at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
  at org.primefaces.component.api.UIData.processDecodes(UIData.java:227)
  at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:506)
  at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
  at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIForm.visitTree(UIForm.java:344)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
  at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
  at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
  at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:931)
  at com.sun.faces.lifecycle.ApplyRequestValuesPhase.execute(ApplyRequestValuesPhase.java:78)
  at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
  at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
  at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
  at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
  at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
  at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
  at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
  at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
  at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
  at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
  at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
  at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
  at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
  at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
  at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
  at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
  at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
  at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
  at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
  at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
  at java.lang.Thread.run(Thread.java:722)

INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: java.lang.ArithmeticException: / by zero
java.lang.ArithmeticException: / by zero
  at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
  at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
  at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
  at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
  at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
  at org.primefaces.component.api.UIData.processValidators(UIData.java:241)
  at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:508)
  at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
  at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIForm.visitTree(UIForm.java:344)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
  at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
  at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
  at javax.faces.component.UIViewRoot.processValidators(UIViewRoot.java:1170)
  at com.sun.faces.lifecycle.ProcessValidationsPhase.execute(ProcessValidationsPhase.java:76)
  at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
  at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
  at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
  at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
  at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
  at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
  at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
  at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
  at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
  at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
  at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
  at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
  at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
  at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
  at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
  at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
  at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
  at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
  at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
  at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
  at java.lang.Thread.run(Thread.java:722)

INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: java.lang.ArithmeticException: / by zero
java.lang.ArithmeticException: / by zero
  at org.primefaces.model.LazyDataModel.setRowIndex(LazyDataModel.java:62)
  at org.primefaces.component.api.UIData.setRowModel(UIData.java:409)
  at org.primefaces.component.api.UIData.setRowIndex(UIData.java:401)
  at org.primefaces.component.api.UIData.processChildren(UIData.java:289)
  at org.primefaces.component.api.UIData.processPhase(UIData.java:261)
  at org.primefaces.component.api.UIData.processUpdates(UIData.java:253)
  at org.primefaces.component.datatable.DataTable.processUpdates(DataTable.java:550)
  at com.sun.faces.context.PartialViewContextImpl$PhaseAwareVisitCallback.visit(PartialViewContextImpl.java:510)
  at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
  at org.primefaces.component.api.UIData.visitTree(UIData.java:639)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIForm.visitTree(UIForm.java:344)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at javax.faces.component.UIComponent.visitTree(UIComponent.java:1601)
  at com.sun.faces.context.PartialViewContextImpl.processComponents(PartialViewContextImpl.java:376)
  at com.sun.faces.context.PartialViewContextImpl.processPartial(PartialViewContextImpl.java:252)
  at javax.faces.context.PartialViewContextWrapper.processPartial(PartialViewContextWrapper.java:183)
  at javax.faces.component.UIViewRoot.processUpdates(UIViewRoot.java:1229)
  at com.sun.faces.lifecycle.UpdateModelValuesPhase.execute(UpdateModelValuesPhase.java:78)
  at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
  at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
  at javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
  at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1550)
  at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
  at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
  at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
  at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
  at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
  at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
  at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
  at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
  at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
  at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
  at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
  at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
  at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
  at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
  at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
  at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
  at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
  at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
  at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
  at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
  at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
  at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
  at java.lang.Thread.run(Thread.java:722)

INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy
INFO: -->  In constructor for TableBeanLazy
INFO: -->  In initialise for TableBeanLazy
INFO: -->  In populateRandomCars for TableBeanLazy

Answer 1

这是您对 CDI 和 JSF 的第一条建议 - 切勿将 CDI 与 JSF 注释混用。

你的问题是你使用 @javax.inject.Named带有 javax.faces.bean.SessionScoped 的 CDI 注释- JSF 注释。

在 CDI 中，您将执行以下操作:

import javax.enterprise.context.SessionScoped;
import javax.inject.Named;

@Named(value = "tableBeanLazy")
@SessionScoped
public class TableBeanLazy {...}

请注意，上述内容与 JSF 一起工作得很好。

以纯 JSF 方式，您将执行以下操作:

import javax.faces.bean.SessionScoped;
import javax.faces.bean.ManagedBean;

@ManagedBean(value = "tableBeanLazy")
@SessionScoped
public class TableBeanLazy {...}

我建议一直坚持使用 CDI。但是，CDI 目前没有为 JSF 提供替代方案 @javax.faces.bean.ViewScoped盒子外面。要在 CDI 中获取它，请查看 Apache Deltaspike。