我創建了一個簡單的應用程序,它使用JSF和託管的bean。來自託管bean我嘗試實例化一個將數據存儲到數據庫的spring bean。然而 「@Autowired」 註解似乎沒有工作,因爲我得到一個nullPointerExcpetion:在託管bean中注入彈簧:
javax.faces.el.EvaluationException:顯示java.lang.NullPointerException
問題出現時調用authenticationComponent。認證()方法
RMQ:我測試ClientService的方法和一切都很好
管理的bean:
@ManagedBean(name="authenticationComponent")
@RequestScoped
public class AuthenticationComponent implements Serializable {
private static final long serialVersionUID = -5085727127290746426L;
private static final String SUCCESS = "success";
private static final String ERROR = "error";
@Autowired
ClientService clientService;
Client client;
String clientName;
String clientPass;
public String authenticate() {
client = clientService.authenticate(clientName, clientPass);
if (client != null) {
return SUCCESS;
}
return ERROR;
}
authentification.xhtml
<p:inputText id="userName" required="true" label="User Name" title="Enter Your Name !" value="#{authenticationComponent.clientName}"/> <p:tooltip for="userName" styleClass="tooltip" showEvent="focus" hideEvent="blur" /> <h:panelGroup> <h:outputText value="User Password : " /> <h:outputText style="color:red" value="* " /> </h:panelGroup> <p:inputText id="userPass" required="true" label="User Password" title="Enter Your Password !" value="#{authenticationComponent.clientPass}" /> <!-- label option is needed for messages component --> <p:tooltip for="userPass" styleClass="tooltip" showEvent="focus" hideEvent="blur" /> <p:commandButton id="submitLoginButton" update="loginPanelGrid,messages" value="Sign In" icon="ui-icon-check" action="#{authenticationComponent.authenticate()}" /> <p:commandButton id="newUserButton" update="loginPanelGrid,messages" value="Sign Up" icon="ui-icon-plus" />
的applicationContext:
<bean id="clientService" class="com.webapp.service.ClientServiceImpl">
<property name="clientDao" ref="clientDao" />
</bean>
<bean id="genericDao" class="com.webapp.dao.GenericDaoImpl" abstract="true" >
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="clientDao" class="com.webapp.dao.ClientDaoImpl" parent="genericDao">
<constructor-arg ref="client" />
</bean>
<bean id="client" class="com.webapp.model.Client"/>
您正在將JSF託管的bean與spring beans混淆。 Spring將不會檢測@Autowired,因爲該bean是由JSF框架創建的應用程序上下文之外的。 – ElderMael
謝謝,請使用什麼然後注入ClientService? –