我是JSF的新手，我只是按照我的课程中的一本书的例子。当我在Net Beans中执行示例时，我得到错误：类'java.lang.String'没有属性'lista'。
My Bean课程：
public class FuncionarioBean {
private Funcionario dados;
private FuncionarioDAO dao;
private DataModel lista;
public FuncionarioBean() {
dados = new Funcionario();
dao = new FuncionarioDAO();
}
public String inserir() {
dados = new Funcionario();
return "confirmarinserir";
}
public String executeInserir() {
return dao.inserir(dados) ? "sucesso" : "erro";
}
public String excluir() {
dados = dao.exibir(getId());
return "confirmarexcluir";
}
public String executeExcluir() {
return dao.excluir(dados) ? "sucesso" : "erro";
}
public String atualizar() {
dados = dao.exibir(getId());
return "confirmaratualizar";
}
public String executeAtualizar() {
return dao.atualizar(dados) ? "sucesso" : "erro";
}
public DataModel getLista() {
lista = new ListDataModel(dao.listar());
return lista;
}
public void setLista(DataModel lista) {
this.lista = lista;
}
public Funcionario getDados() {
return dados;
}
public void setDados(Funcionario dados) {
this.dados = dados;
}
public int getId() {
FacesContext contexto = FacesContext.getCurrentInstance();
HttpServletRequest req = (HttpServletRequest) contexto.getExternalContext().getRequest();
return Integer.parseInt(req.getParameter("pid"));
}
}
faces-config.xml中
<faces-config version="2.1"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_1.xsd">
<managed-bean>
<managed-bean-name>func</managed-bean-name>
<maged-bean-class>
controle.FuncionarioBean
</maged-bean-class>
<managed-bean-scope>session</managed-bean-scope>
</managed-bean>
的index.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@taglib prefix="f" uri="http://java.sun.com/jsf/core"%>
<%@taglib prefix="h" uri="http://java.sun.com/jsf/html"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<f:view>
<html>
<head>
<f:loadBundle basename="util.configuracoes" var="conf" />
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title><h:outputText value="#{conf.Titulo}" /></title>
<link rel="stylesheet" type="text/css" href="estilo.css">
</head>
<body>
<h1><h:outputText value="#{conf.Titulo}" /></h1>
<h:form>
<h:dataTable id="TabFuncionarios" value="#{func.lista}" var="lista" headerClass="cabecalho" rowClasses="linhaPar,linhaImpar">
<h:column>
<f:facet name="header">
<h:outputText value="#{conf.Id}" />
</f:facet>
<h:outputText value="#{lista.id}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{conf.Nome}" />
</f:facet>
<h:outputText value="#{lista.nome}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{conf.Endereco}" />
</f:facet>
<h:outputText value="#{lista.endereco}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{conf.Bairro}" />
</f:facet>
<h:outputText value="#{lista.bairro}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{conf.Cidade}" />
</f:facet>
<h:outputText value="#{lista.cidade}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{conf.Cep}" />
</f:facet>
<h:outputText value="#{lista.cep}" />
</h:column>
<h:column>
<f:facet name="header">
<h:outputText value="#{conf.Salario}" />
</f:facet>
<h:outputText value="#{lista.salario}">
<f:convertNumber pattern="R$ ###,###,00" />
</h:outputText>
</h:column>
<h:column>
<h:commandLink action="#{func.atualizar}" value="atualizar">
<f:param name="pid" value="#{lista.id}" />
</h:commandLink>
</h:column>
<h:column>
<h:commandLink action="#{func.excluir}" value="excluir">
<f:param name="pid" value="#{lista.id}" />
</h:commandLink>
</h:column>
</h:dataTable>
<h:commandLink action="#{func.inserir}" value="Inserir Funcionário" />
</h:form>
</body>
</html>
</f:view>
堆栈追踪：
javax.el.PropertyNotFoundException: The class 'java.lang.String' does not have the property 'lista'.
at javax.el.BeanELResolver.getBeanProperty(BeanELResolver.java:722)
at javax.el.BeanELResolver.getValue(BeanELResolver.java:351)
at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
at com.sun.el.parser.AstValue.getValue(AstValue.java:138)
at com.sun.el.parser.AstValue.getValue(AstValue.java:183)
at com.sun.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:224)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)
at javax.faces.component.UIData.getValue(UIData.java:731)
at javax.faces.component.UIData.getDataModel(UIData.java:1798)
at javax.faces.component.UIData.setRowIndexWithoutRowStatePreserved(UIData.java:484)
at javax.faces.component.UIData.setRowIndex(UIData.java:473)
at com.sun.faces.renderkit.html_basic.TableRenderer.encodeBegin(TableRenderer.java:81)
at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:820)
at javax.faces.component.UIData.encodeBegin(UIData.java:1118)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1755)
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:1757)
at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1760)
at com.sun.faces.application.view.JspViewHandlingStrategy.doRenderView(JspViewHandlingStrategy.java:432)
at com.sun.faces.application.view.JspViewHandlingStrategy.renderView(JspViewHandlingStrategy.java:233)
at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:131)
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.StandardWrapper.service(StandardWrapper.java:1550)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:281)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:655)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:595)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:161)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:331)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:231)
at com.sun.enterprise.v3.services.impl.ContainerMapper$AdapterCallable.call(ContainerMapper.java:317)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:195)
at com.sun.grizzly.http.ProcessorTask.invokeAdapter(ProcessorTask.java:860)
at com.sun.grizzly.http.ProcessorTask.doProcess(ProcessorTask.java:757)
at com.sun.grizzly.http.ProcessorTask.process(ProcessorTask.java:1056)
at com.sun.grizzly.http.DefaultProtocolFilter.execute(DefaultProtocolFilter.java:229)
at com.sun.grizzly.DefaultProtocolChain.executeProtocolFilter(DefaultProtocolChain.java:137)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:104)
at com.sun.grizzly.DefaultProtocolChain.execute(DefaultProtocolChain.java:90)
at com.sun.grizzly.http.HttpProtocolChain.execute(HttpProtocolChain.java:79)
at com.sun.grizzly.ProtocolChainContextTask.doCall(ProtocolChainContextTask.java:54)
at com.sun.grizzly.SelectionKeyContextTask.call(SelectionKeyContextTask.java:59)
at com.sun.grizzly.ContextTask.run(ContextTask.java:71)
at com.sun.grizzly.util.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:532)
at com.sun.grizzly.util.AbstractThreadPool$Worker.run(AbstractThreadPool.java:513)
at java.lang.Thread.run(Thread.java:662)
有人可以帮助我吗？
答案 0 :(得分：1)
您应该在var
var=lista以外的datatable的其他名称
答案 1 :(得分：0)
我修复了错误：“JSF错误：类'java.lang.String'没有属性'lista'”创建一个新项目并将优先语言设置为jsp而不是facelets。
答案 2 :(得分：0)
在java代码和.xhtml页面中注释了一些行后，我遇到了同样的问题。但如果我取消注释所有问题就会消失。我也尝试清理浏览器缓存。
解决方案似乎是取消注释或删除答案 3 :(得分：0)
解决方案可能是您的模型类需要公开：
public class Car implements Serializable{
答案 4 :(得分：0)
我在使用<c:forTokens>而不是<c:forEach>时看到了这一点。使用forEach进行对象和属性访问。