Question

我尝试使用Click进行单元格编辑来创建DataTables，如下所示：https://www.primefaces.org/showcase/ui/data/datatable/edit.xhtml

我遇到的问题是表格不会考虑修改。从MySQL数据库显示数据没有问题。表格正确加载，没有错误。当我尝试修改单元格时，它会按预期变为输入。但是当我更改值并按回车键时，单元格将返回其原始值。如果我在该单元格上重新进入编辑模式，则会再次出现我的修改。未在数据库中进行修改。

我对JSF和PrimeFaces不太放心，我肯定错过了一些明显的东西。

这是我的代码：

Managed Bean：

package Application;

import java.io.Serializable;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.ejb.EJB;
import javax.faces.application.FacesMessage;
import javax.faces.context.FacesContext;
import javax.inject.Named;
import javax.faces.view.ViewScoped;
import org.primefaces.event.CellEditEvent;
import org.primefaces.event.RowEditEvent;


@Named(value = "plantCtrl")
@ViewScoped

public class PlantCtrl implements Serializable {

    @EJB
    private PlantDAO plantDAO;

    public PlantCtrl() {
    }

    @PostConstruct
    public void init(){
    }

    public List<Plant> getPlants() {
        return plantDAO.allPlants();
    }

    public PlantDAO getPlantDAO() {
        return plantDAO;
    }

    public void setPlantDAO(PlantDAO plantDAO) {
        this.plantDAO = plantDAO;
    }

    public void onRowEdit(RowEditEvent event) {
        FacesMessage msg = new FacesMessage("Plant Edited");
        FacesContext.getCurrentInstance().addMessage(null, msg);
    }

    public void onRowCancel(RowEditEvent event) {
        FacesMessage msg = new FacesMessage("Edit Cancelled");
        FacesContext.getCurrentInstance().addMessage(null, msg);
    }

    public void onCellEdit(CellEditEvent event) {
        Object oldValue = event.getOldValue();
        Object newValue = event.getNewValue();

        if(newValue != null && !newValue.equals(oldValue)) {
            FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_INFO, "Cell Changed", "Old: " + oldValue + ", New:" + newValue);
            FacesContext.getCurrentInstance().addMessage(null, msg);
        }
    }
}

PlantDAO：

package Application;

import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

@Stateless
public class PlantDAO {

    @PersistenceContext(unitName = "CarnivorousGardenPU")
    private EntityManager em;

    public List<Plant> allPlants() {
        Query query = em.createNamedQuery("Plant.findAll");
        return query.getResultList();
    }

    public void add(Plant p) {
        em.persist(p);
        em.flush();
    }

    public void edit(Plant p) {
        em.merge(p);
        em.flush();
    }

    public void remove(Plant p) {
        em.remove(em.merge(p));
        em.flush();
    }
}

XHTML：

<?xml version="1.0" encoding="UTF-8"?>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://xmlns.jcp.org/jsf/html"
      xmlns:p="http://primefaces.org/ui"
      xmlns:f="http://xmlns.jcp.org/jsf/core"
      xmlns:ui="http://xmlns.jcp.org/jsf/facelets">

    <h:head>
        <title>Dashboard</title>
    </h:head>

    <h:body>

        <ui:include src="inc/header.xhtml" />

        <h:form id="plantAdminList">

            <p:growl id="msgs" showDetail="true"/>

            <p:dataTable id="plantsTable" var="plant" value="#{plantCtrl.plants}" editable="true" editMode="cell" widgetVar="cellPlants">
               <f:facet name="header">
                   Cell Editing with Click and RightClick
               </f:facet>

                <p:ajax event="cellEdit" listener="#{plantCtrl.onCellEdit}" update=":plantAdminList:msgs, :plantAdminList:plantsTable" />

                <p:column headerText="Id">
                    <p:cellEditor>
                        <f:facet name="output"><h:outputText value="#{plant.genusPlant}" /></f:facet>
                        <f:facet name="input"><p:inputText id="modelInput" value="#{plant.genusPlant}" style="width:96%"/></f:facet>
                    </p:cellEditor>
                </p:column>

                <p:column headerText="Price">
                    <p:cellEditor>
                        <f:facet name="output"><h:outputText value="#{plant.pricePlant}" /></f:facet>
                        <f:facet name="input"><p:inputText value="#{plant.pricePlant}" style="width:96%" label="Price"/></f:facet>
                    </p:cellEditor>
                </p:column>

            </p:dataTable>

        </h:form>

        <ui:include src="/inc/footer.xhtml" />

    </h:body>

</html>

Plant.java由Netbeans自动生成为数据库中的实体类。我没有因为没有超载此帖而发帖，但如果需要，请不要犹豫。

Answer 1

像这样修改托管bean的几行

api.adwords.developerToken=123axxxxxxxxxxxxxxxxxx
api.adwords.clientId=xxxxxxxxxx.apps.googleusercontent.com
api.adwords.clientSecret=zZxxxxxTxxxxxxxxxxx
api.adwords.clientCustomerId=123-456-7890
api.adwords.refreshToken=1/dyOIp7ki-xxxxxxxxxxxxxxxxxxxxxxxx

它将按您的意愿工作：当您更改值并按Enter键时，单元格将反映您的更改。

请注意：

如果要保留对数据库的更改，则需要稍微修改packagingOptions { exclude 'META-INF/ECLIPSE_.SF' exclude 'META-INF/ECLIPSE_.RSA' } compile("one-of-your-dependency:1.0.0"){ exclude group: 'org.eclipse.paho' }并在托管bean中创建其他逻辑以检测修改并将其传递给现有的//.... List<Plant> plants; @PostConstruct public void init(){ plants=plantDAO.allPlants(); } public List<Plant> getPlants() { return plants; } //....方法。编码最小值为：

像这样修改数据表
```
p:dataTable
```

修改托管bean内的plantDao.edit

p:dataTable id="plantsTable" var="plant" value="#{plantCtrl.plants}" editable="true" widgetVar="cellPlants">

     <p:ajax event="rowEdit" listener="#{plantCtrl.onRowEdit}" 
             update=":plantAdminList:msgs, :plantAdminList:plantsTable" />
 ....
    <p:column style="width:32px">
        <p:rowEditor />
    </p:column>
</p:dataTable>

p：dataTable Not Editing

1 个答案: