我試圖在我的項目中實現登錄系統,但我無法獲得成功。我在我的項目中使用了Tomcat 7,Java 6和JSF 2.0,並且總是嘗試將用戶重定向到另一個頁面,我得到了一個不同的錯誤。無法重定向或發送到JSF 2.0中的另一個頁面
以下是login.xhtml
相關部分:
<h:form id="form-login">
<fieldset>
<div class="form-group">
<label for="login">Login:</label>
<p:inputText styleClass="form-control" autocomplete="off" id="login"
placeholder="Nome de usuário" style="padding: 6px 12px;" required="true"
requiredMessage="Este campo é obrigatório." value="#{loginMBean.login}"/>
</div>
<div class="form-group">
<label for="senha">Senha: </label>
<p:inputText styleClass="form-control" autocomplete="off" id="senha"
type="password" placeholder="Senha" style="padding: 6px 12px;"
required="true" requiredMessage="Este campo é obrigatório."
value="#{loginMBean.password}" />
</div>
<div class="form-actions">
<h:commandButton value="Entrar" styleClass="btn btn-default btn-lg"
action="#{loginMBean.entrar}" />
</div>
</fieldset>
</h:form>
我loginMBean
:
(String login, string password, this part is okay, already works)
...
public void entrar() throws IOException{
Login loginTentativa = new Login(login, password);
int resultadoValidacao = controle.validaLogin(loginTentativa);
switch (resultadoValidacao) {
case 0:
FacesContext.getCurrentInstance().getExternalContext().dispatch("first/1-dados-escola.xhtml");
case 1:
FacesContext.getCurrentInstance().getExternalContext().redirect("/user/principal.xhtml");
default:
System.out.println("Usuário não autenticado.");
}
}
案例0:用戶通過身份驗證,這是不是第一次他訪問該網站。
案例1:用戶認證,這是他第一次訪問該網站。
案例2:未通過身份驗證。
在我的測試,我有情況1。但是,當我使用「重定向」,我得到了以下錯誤消息:
javax.faces.el.EvaluationException: java.lang.IllegalStateException
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:101)
javax.faces.component.UICommand.broadcast(UICommand.java:315)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:791)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1256)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
當我嘗試使用「調度」 ,我得到了:
javax.faces.el.EvaluationException: java.lang.IllegalStateException: Cannot forward after response has been committed
javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:101)
javax.faces.component.UICommand.broadcast(UICommand.java:315)
javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:791)
javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1256)
com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:118)
javax.faces.webapp.FacesServlet.service(FacesServlet.java:593)
我做錯了什麼? :/
您在switch語句中沒有使用break語句。 – Ajeesh
是的,謝謝@Ajeesh正如我所說的,新手錯誤:/ – Paladini