Jakarta ee J2EE primesfaces自动完成值检索

如何检索primefaces自动完成的选定值

<p:autoComplete value="#{completeBean.selected1}"  
 id="basicPojo1" completeMethod="#{completeBean.completePlayer}"
 var="p" itemLabel="#{p.getMateriel().getNumparc()}" itemValue="#{p}" 
 converter="numparc" forceSelection="true"> 
    <f:ajax   execute="basicPojo1" listener="#{evenEdl.submitListener}" render="@all"/>
</p:autoComplete>


public void submitListener(AjaxBehaviorEvent event) {
    String id = event.getComponent().getId();
    switch (id) { 
        case "basicPojo1":
            String parametre = FacesContext.getCurrentInstance().getExternalContext()
                                      .getRequestParameterMap().get("basicPojo1");
            System.out.println("test param"+parametre);
                 break;
    }
}

公共无效提交者（AjaxBehaviorEvent事件）{
字符串id=event.getComponent（）.getId（）；
开关（id）{
案例“basicPojo1”：
字符串参数=FacesContext.getCurrentInstance（）.getExternalContext（）
.getRequestParameterMap（）.get（“basicPojo1”）；
系统输出打印项次（“测试参数”+参数）；
打破
}
}

这里有一个p:autocomplete与实体转换器的示例：

---

脸：

<p:autoComplete id="autocomplete1" value="#{mBAutoComplete.selectedEntity}" completeMethod="#{mBAutoComplete.complete}"
    forceSelection="true" minQueryLength="3" maxResults="10">
    <p:ajax update="autocomplete1" event="itemSelect" listener="#{mBAutoComplete.updateEntity}" />
</p:autoComplete>

  @FacesConverter(forClass = Entity.class,value = "entityConveter")
  public class EntityConverter implements Converter {

      public EntityConverter() {

      }

      @Override
      public Entity getAsObject(FacesContext arg0, UIComponent arg1, String arg2) {
          // get Entity with WebService, but you can get it with other ways :
          // like calling EJB methods or using a Collection of Entity provided in
          // another managed bean
          return services.getWebService().getEntity(Integer.valueOf(arg2));
      }

      @Override
      public String getAsString(FacesContext arg0, UIComponent arg1, Object arg2) {
          return String.valueOf(((Entity) arg2).getEntityID());
      }
  }

@ManagedBean(name = "mBAutoComplete")
@SessionScoped
public class MBAutoComplete {

    // Entity
    private Entity selectedEntity;

    // Entity Autocomplete
    public List<String> complete(String query) {

        List<String> results = new ArrayList<String>();

        for (Entity en : this.eqList) {
            if (en.getEntityID().startsWith(query)) {
                results.add(en.getEntityID());
            }
        }

        return results;
   }

    public void updateEntity(SelectEvent e) {
         // Don't forget to check null Object sent by SelectEvent
         this.selectedEntity = (Entity) e.getObject();
    }

    // GETTERS & SETTERS

    public void setSelectedEntity(Entity e) {
         this.selectedEntity = e;
    }

    public Entity getSelectedEntity() {
         return this.selectedEntity();
    }

}

---

ManagedBean:

<p:autoComplete id="autocomplete1" value="#{mBAutoComplete.selectedEntity}" completeMethod="#{mBAutoComplete.complete}"
    forceSelection="true" minQueryLength="3" maxResults="10">
    <p:ajax update="autocomplete1" event="itemSelect" listener="#{mBAutoComplete.updateEntity}" />
</p:autoComplete>

  @FacesConverter(forClass = Entity.class,value = "entityConveter")
  public class EntityConverter implements Converter {

      public EntityConverter() {

      }

      @Override
      public Entity getAsObject(FacesContext arg0, UIComponent arg1, String arg2) {
          // get Entity with WebService, but you can get it with other ways :
          // like calling EJB methods or using a Collection of Entity provided in
          // another managed bean
          return services.getWebService().getEntity(Integer.valueOf(arg2));
      }

      @Override
      public String getAsString(FacesContext arg0, UIComponent arg1, Object arg2) {
          return String.valueOf(((Entity) arg2).getEntityID());
      }
  }

@ManagedBean(name = "mBAutoComplete")
@SessionScoped
public class MBAutoComplete {

    // Entity
    private Entity selectedEntity;

    // Entity Autocomplete
    public List<String> complete(String query) {

        List<String> results = new ArrayList<String>();

        for (Entity en : this.eqList) {
            if (en.getEntityID().startsWith(query)) {
                results.add(en.getEntityID());
            }
        }

        return results;
   }

    public void updateEntity(SelectEvent e) {
         // Don't forget to check null Object sent by SelectEvent
         this.selectedEntity = (Entity) e.getObject();
    }

    // GETTERS & SETTERS

    public void setSelectedEntity(Entity e) {
         this.selectedEntity = e;
    }

    public Entity getSelectedEntity() {
         return this.selectedEntity();
    }

}

@ManagedBean（name=“mbautomplete”）
@会议范围
公共类mbautomplete{
//实体
私人实体选择权；
//实体自动完成
公共列表完成（字符串查询）{
列表结果=新建ArrayList（）；
for（实体en:this.eqList）{
if（en.getEntityID（）.startWith（查询））{
results.add（en.getEntityID（））；
}
}
返回结果；
}
公共无效更新属性（选择事件e）{
//不要忘记检查SelectEvent发送的空对象
this.selectedEntity=（实体）e.getObject（）；
}
//接球手和接球手
公共选择权（实体e）{
这个。selectedEntity=e；
}
公共实体getSelectedEntity（）{
返回此值。selectedEntity（）；
}
}

---

在本例中，您不需要使用FacesContext，只需使用SelectEvent和转换器

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希望这有帮助

您希望从何处获取所选值？在submitListener方法中，我的侦听器工作正常，开关检索ID（框“basicPojo1”->ok）。在本文中，我希望检索autocomplete jsf的所选（字符串参数中）值以执行Bean端处理，但我没有成功地使用这个字符串参数：FacesContext.getCurrentInstance（）.getExternalContext（）.getRequestParameterMap（）.get（“basicPojo1”）；不完全确定你想要实现什么。您需要如何处理所选的值？当您在“自动完成”中选择一个值时，它将在表单最终提交时绑定到completeBean.selected1。或者，您是否正在尝试在选择值后立即填充其他内容？My completeBean.selected1始终为空，并且我无法恢复任何内容。请查看primefaces showcase：这是您想要的吗？仔细看看p:ajax