我是Java新手，现在正在努力学习。 我需要在数据表中更新，由 addInventory 方法手动添加的数据，女巫正在工作。我有一个＆＃34;编辑＆＃34;按钮，但不起作用。这是错误：
javax.el.ELException: org.springframework.dao.InvalidDataAccessApiUsageException: Bean object must not be null; nested exception is java.lang.IllegalArgumentException: Bean object must not be null
at org.apache.el.parser.AstValue.invoke(AstValue.java:260) ~[tomcat-embed-el-8.0.32.jar!/:8.0.32]
at org.apache.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:267) ~[tomcat-embed-el-8.0.32.jar!/:8.0.32]
at javax.faces.event.MethodExpressionActionListener.processAction(MethodExpressionActionListener.java:149) ~[javax.faces-2.2.11.jar!/:2.2.11]
at javax.faces.event.ActionEvent.processListener(ActionEvent.java:88) ~[javax.faces-2.2.11.jar!/:2.2.11]
at javax.faces.component.UIComponentBase.broadcast(UIComponentBase.java:813) ~[javax.faces-2.2.11.jar!/:2.2.11]
at javax.faces.component.UICommand.broadcast(UICommand.java:300) ~[javax.faces-2.2.11.jar!/:2.2.11]
at javax.faces.component.UIData.broadcast(UIData.java:1108) ~[javax.faces-2.2.11.jar!/:2.2.11]
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790) ~[javax.faces-2.2.11.jar!/:2.2.11]
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282) ~[javax.faces-2.2.11.jar!/:2.2.11]
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81) ~[javax.faces-2.2.11.jar!/:2.2.11]
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101) [javax.faces-2.2.11.jar!/:2.2.11]
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198) [javax.faces-2.2.11.jar!/:2.2.11]
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:654) [javax.faces-2.2.11.jar!/:2.2.11]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) [tomcat-embed-websocket-8.0.32.jar!/:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) [tomcat-embed-core-8.0.32.jar!/:8.0.32]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) [tomcat-embed-core-8.0.32.jar!/:8.0.32].
服务代码是：
@Service
public class InventoryService implements IInventoryService{
@Autowired
private InventoryDao inventoryDAO;
List<InventoryDTO> inventoryDTOs = new ArrayList<InventoryDTO>();
@Override
public List<Inventory> getInventories() {
return (List<Inventory>) inventoryDAO.findAll();
}
public Inventory getInventories(long id) {
return inventoryDAO.findOne(id);
}
public Inventory getInventory(long id) {
Inventory inventory = inventoryDAO.findOne(id);
if (inventory == null)
return null;
return inventory.convertToDTO().convertToEntity();
}
@Override
public Inventory addInventory(Inventory inventory) {
return inventoryDAO.save(inventory);
}
@Override
public Inventory updateInventory(Inventory inventory) {
return inventoryDAO.save(inventory);
}
这是控制器视图：
@Component("invController")
@Scope(FacesViewScope.NAME)
@Getter
@Setter
public class InvController implements Serializable {
private static final long serialVersionUID = 1L;
private boolean canEdit;
private List<Inventory> inventories = new ArrayList<>();
@Autowired
private InventoryService inventoryService;
private InventoryDTO inventoryDTO = new InventoryDTO();
@PostConstruct
public void initInventories() {
inventories = inventoryService.getInventories();
}
public void setInventoryDTO(InventoryDTO inventoryDTO) {
this.inventoryDTO = inventoryDTO;
}
public void addInventory() {
if (!inventories.add(inventoryService.addInventory(inventoryDTO.convertToEntity())))
throw new IllegalArgumentException("Inventory could not be added to DB!");
}
public void updateInventory() {
Inventory inventory = inventoryService.getInventory(inventoryDTO.convertToEntity().getId());
inventoryService.updateInventory(inventory).convertToDTO();
inventoryDTO = new InventoryDTO();
}
Here is the xhtml file:
<html>
<h:head>
<!-- For Bootstrap responsive grid -->
<link rel="stylesheet"
href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.4/css/bootstrap.min.css" />
</h:head>
<ui:define name="content">
<h:form id="form" style="height:725px">
<center>
<h3 class="hardblue" style="margin-top:50px">Inventar</h3>
</center>
<center>
<p:tabView scrollable="true" style="width:75%; margin-top:100px">
<p:tab title="Beneficiar">
<p:panelGrid style="width:500px" id="idPanel1" var="beneficiaries"
editable="true" editMode="row">
<p:column headerText="Numar">Numar
<h:inputText value="#{invController.inventoryDTO.number}"
disabled="#{!invController.canEdit}"
style="font-weight:bold" />
</p:column>
<p:column headerText="Descriere">Descriere
<h:inputText value="#{invController.inventoryDTO.description}"
disabled="#{!invController.canEdit}"
style="font-weight:bold" />
</p:column>
<p:column headerText="Tipul de explozibil">Tip de explozibil
<h:inputText value="#{invController.inventoryDTO.types}"
disabled="#{!invController.canEdit}"
style="font-weight:bold" />
</p:column>
</p:panelGrid>
</p:tab>
<p:tab title="Locul de unde se ridica">
<p:dataTable>
<p:column headerText="Loc">
<h:outputText value="#{tableComplete.locRidicare}" />
</p:column>
<p:column headerText="Localitate">
<h:outputText value="#{tableComplete.locRidicareLoc}" />
</p:column>
</p:dataTable>
</p:tab>.
<p:tab title="Locul unde se transporta">
<p:dataTable>
<p:column headerText="Loc">
<h:outputText value="#{tableComplete.locDepunere}" />
</p:column>
<p:column headerText="Localitate">
<h:outputText value="#{tableComplete.locDepunereLoc}" />
</p:column>
</p:dataTable>
</p:tab>
<p:tab title="Vehicul Transport Marfa">
<p:dataTable>
<p:column headerText="Marca">
<h:outputText value="#{tableComplete.vehTrMarfaMarca}" />
</p:column>
<p:column headerText="Model">
<h:outputText value="#{tableComplete.vehTrMarfaModel}" />
</p:column>
<p:column headerText="Nr. Inmatriculare">
<h:outputText value="#{tableComplete.vehTrMarfaNI}" />
</p:column>
<p:column headerText="Numele Conducatorului">
<h:outputText value="#{tableComplete.vehTrMarfaC}" />
</p:column>
<p:column headerText="Act de Identitate al Conducatorului">
<h:outputText value="#{tableComplete.vehTrMarfaAIC}" />
</p:column>
</p:dataTable>
</p:tab>
<p:tab title="Vehicul Transport Paza">
<p:dataTable>
<p:column headerText="Marca">
<h:outputText value="#{tableComplete.vehTrPazaMarca}" />
</p:column>
<p:column headerText="Model">
<h:outputText value="#{tableComplete.vehTrPazaModel}" />
</p:column>
<p:column headerText="Nr. Inmatriculare">
<h:outputText value="#{tableComplete.vehTrPazaNI}" />
</p:column>
<p:column headerText="Numele Conducatorului">
<h:outputText value="#{tableComplete.vehTrPazaC}" />
</p:column>
<p:column headerText="Act de Identitate al Conducatorului">
<h:outputText value="#{tableComplete.vehTrPazaAIC}" />
</p:column>
</p:dataTable>
</p:tab>
<p:tab title="Artificier">
<p:panelGrid style="width:500px" id="idPanel2" var="pyrotechnists"
editable="true" editMode="row">
<p:column headerText="numar">Numar
<h:inputText value="#{invController.inventoryDTO.number}"
disabled="#{invController.canEdit}"
style="font-weight:bold" />
</p:column>
<p:column headerText="Descriere">Descriere
<h:inputText value="#{invController.inventoryDTO.description}"
disabled="#{invController.canEdit}"
style="font-weight:bold" />
</p:column>
<p:column headerText="Act de Identitate">Act de identitate
<h:inputText value="#{invController.inventoryDTO.types}"
disabled="#{invController.canEdit}"
style="font-weight:bold" />
</p:column>
</p:panelGrid>
<p:commandButton value="Add Inventory" id="ajax" update="@form" actionListener="#{invController.addInventory}" styleClass="ui-priority-primary" />
</p:tab>
<p:tab title="Paza 1">
<p:dataTable>
<p:column headerText="Nume">
<h:outputText value="#{tableComplete.paza1Nume}" />
</p:column>
<p:column headerText="Prenume">
<h:outputText value="#{tableComplete.paza1Prenume}" />
</p:column>
<p:column headerText="Act de Identitate">
<h:outputText value="#{tableComplete.paza1AI}" />
</p:column>
</p:dataTable>
</p:tab>
<p:tab title="Paza 2">
<p:dataTable>
<p:column headerText="Nume">
<h:outputText value="#{tableComplete.paza2Nume}" />
</p:column>
<p:column headerText="Prenume">
<h:outputText value="#{tableComplete.paza2Prenume}" />
</p:column>
<p:column headerText="Act de Identitate">
<h:outputText value="#{tableComplete.paza2AI}" />
</p:column>
</p:dataTable>
</p:tab>
<p:tab title="Tipuri de Materii Explozive">
<p:dataTable>
<p:column headerText="Nr. N.U.">
<h:outputText value="#{tableComplete.tipENr}" />
</p:column>
<p:column headerText="C.I. Diviziune">
<h:outputText value="#{tableComplete.tipEDiv}" />
</p:column>
<p:column headerText="Denumire Comerciala">
<h:outputText value="#{tableComplete.tipEDC}" />
</p:column>
<p:column headerText="Marcaj C.E.">
<h:outputText value="#{tableComplete.tipEMarcaj}" />
</p:column>
<p:column headerText="Furnizor">
<h:outputText value="#{tableComplete.tipEFurnizor}" />
</p:column>
<p:column headerText="Cantitate">
<h:outputText value="#{tableComplete.tipECant}" />
</p:column>
</p:dataTable>
</p:tab>
</p:tabView>
<p:dataTable paginator="true" scrollable="true" id="invList" value="#{invController.inventories}" ajax="true" var="inv" style="width:75%; margin-top:50px">
<p:column>
<f:facet name="header">
<h:outputText value="Number" />
</f:facet>
<h:outputText value="#{inv.number}" />
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="Cui" />
</f:facet>
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="Tipuri" />
</f:facet>
<h:outputText value="#{inv.types}" />
</p:column>
<p:column>
<f:facet name="header">
<h:outputText value="Edit" />
</f:facet>
<p:commandButton value="Edit" id="ajax2" update="invList" actionListener="#{invController.updateInventory()}" styleClass="ui-priority-primary" />
</p:column>
</p:dataTable>
</center>
</h:form>
</ui:define>
</html>
</ui:composition>
答案 0 :(得分：0)
我建议你一种方式
这是你写一个<h:inputText value="#{bean.value}" rendered="#{bean.flag}"/>，其中标志变量在bean <h:outputText>中是假的
然后编写一个jquery来单击表中的这个文本，这个标志变为true，h：outputText用false标志呈现。