com.sun.faces.mgbean.ManagedBeanCreationException

com.sun.faces.mgbean.ManagedBeanCreationException: 无法创建受管 bean dataBean。发现以下问题：

- 受管 bean dataBean 的属性 userService 不存在。

at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:265)

at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)

at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)

at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)

at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)

at org.apache.el.parser.AstIdentifier.getValue(AstIdentifier.java:72)

at org.apache.el.parser.AstValue.getValue(AstValue.java:161)

at org.apache.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:185)

at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)

at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)

at org.primefaces.component.datatable.DataTable.getSelection(DataTable.java:202)

at org.primefaces.component.datatable.DataTable.findSelectedRowKeys(DataTable.java:1003)

at org.primefaces.component.datatable.DataTableRenderer.encodeTbody(DataTableRenderer.java:635)

at org.primefaces.component.datatable.DataTableRenderer.encodeRegularTable(DataTableRenderer.java:249)

at org.primefaces.component.datatable.DataTableRenderer.encodeMarkup(DataTableRenderer.java:211)

at org.primefaces.component.datatable.DataTableRenderer.encodeEnd(DataTableRenderer.java:83)

at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)

at org.primefaces.renderkit.CoreRenderer.renderChild(CoreRenderer.java:74)

at org.primefaces.renderkit.CoreRenderer.renderChildren(CoreRenderer.java:57)

at org.primefaces.component.panel.PanelRenderer.encodeContent(PanelRenderer.java:204)

at org.primefaces.component.panel.PanelRenderer.encodeMarkup(PanelRenderer.java:121)

at org.primefaces.component.panel.PanelRenderer.encodeEnd(PanelRenderer.java:58)

at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:875)

at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1786)

at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)

at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:845)

at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1779)

at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)

at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1782)

at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:424)

at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124)

at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:121)

at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)

at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)

at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)

at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)

at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)

at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)

at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)

at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)

at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)

at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)

at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)

at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)

at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)

at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)

at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310)

at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)

at java.lang.Thread.run(Thread.java:662)

以下是我的配置，其实是一个简单的 Spring - JSF - Mybatis 配置

0) sqlconfig.xml

//别名信息配置

<typeAliases>

<typeAlias type="com.changxin.model.Person" alias="Person"/>

<typeAlias type="com.changxin.model.User" alias="User"/>

</typeAliases>

1）applicationContext.xml

<bean id="userService" class="com.changxin.service.user.UserService"></bean>

2) web.xml

<!-- Spring -->

<listener>

<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

</listener>

<!-- Spring && JSF -->

<listener>

<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>

</listener>

3) faces-config.xml

<application>

<el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>

</application>

4)backBean

@ManagedBean(name = "dataBean")

@SessionScoped

public class DataBean implements Serializable {

private static final long serialVersionUID = 1L;

@ManagedProperty(value="#{userService}")

private UserService userService;

/* get set 很重要 */

出现这个问题就是因为我的backbean没有写set/get方法！！！！！