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我正在使用带有 primefaces 的 jsf 开发 Web 应用程序，我使用了一个登录操作和 2 个 xhtml 页面。当我登录时，它调用动作类并且它没有返回到下一个 xhtml 页面

重定向页面时出现问题，我使用了 primefaces 3.2 版本的 jar 文件，并且我在项目方面用 jstl 配置了 jsf。

我的登录 xhtml 页面

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets"
      xmlns:p="http://primefaces.org/ui"> 

<h:head></h:head> 
<body> 
    <h:form styleClass="loginPanelStyle">
       <p:panel id="panel" header="Login">  

        <p:messages id="msgs"/>  

        <h:panelGrid columns="3">  
            <h:outputLabel for="firstname" value="UserName" />  
            <p:inputText id="firstname" value="#{home.username}" required="true" label="UserName">  
                <f:validateLength minimum="2" />  
            </p:inputText>  
            <p:message for="firstname" display="icon"/>  

            <h:outputLabel for="surname" value="Password" />  
            <p:inputText id="surname" value="#{home.password}" label="Password" required="true">  
                <f:validateLength minimum="2" />  
                <p:ajax update="msgSurname" event="keyup" />  
            </p:inputText>  
            <p:message for="surname" id="msgSurname" display="icon"/>  

        </h:panelGrid>  

        <p:commandButton id="btn" value="Login" update="panel" actionListener="#{home.validateUser}"/>
    </p:panel>  
    </h:form>
</body> 
</html>

我的行动课

package com.cation.action;

import java.util.List;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.Query;

import logon.Users;

public class LoginAction {

    private String username;

    private String password;

    private static final String PERSISTENCE_UNIT_NAME = "Cation";

    private static EntityManagerFactory factory;

    @SuppressWarnings("unchecked")
    public String validateUser() throws Exception {
        factory = Persistence.createEntityManagerFactory(PERSISTENCE_UNIT_NAME);
        EntityManager em = factory.createEntityManager();
        // Read the existing entries and write to console
        Query q = em.createQuery("SELECT u FROM Users u where u.Login='"+username+"'");
        List<Users> userList = q.getResultList();
        Users user = (Users) userList.get(0);

        if(user == null){
            return "error";
        }
        return "home_page";
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

我的 web.xml 文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>Cation</display-name>
  <context-param>
    <param-name>javax.faces.PROJECT_STAGE</param-name>
    <param-value>Development</param-value>
  </context-param>
  <welcome-file-list>
    <welcome-file>faces/login.xhtml</welcome-file>
  </welcome-file-list>
  <listener>
    <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
  </listener>
  <context-param>
    <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
    <param-value>resources.application</param-value>
  </context-param>
  <context-param>
    <description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
    <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
    <param-value>client</param-value>
  </context-param>
  <context-param>
    <description>
    This parameter tells MyFaces if javascript code should be allowed in
    the rendered HTML output.
    If javascript is allowed, command_link anchors will have javascript code
    that submits the corresponding form.
    If javascript is not allowed, the state saving info and nested parameters
    will be added as url parameters.
    Default is 'true'</description>
    <param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
    <param-value>true</param-value>
  </context-param>
  <context-param>
    <description>
    If true, rendered HTML code will be formatted, so that it is 'human-readable'
    i.e. additional line separators and whitespace will be written, that do not
    influence the HTML code.
    Default is 'true'</description>
    <param-name>org.apache.myfaces.PRETTY_HTML</param-name>
    <param-value>true</param-value>
  </context-param>
  <context-param>
    <param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
    <param-value>false</param-value>
  </context-param>
  <context-param>
    <description>
    If true, a javascript function will be rendered that is able to restore the
    former vertical scroll on every request. Convenient feature if you have pages
    with long lists and you do not want the browser page to always jump to the top
    if you trigger a link or button action that stays on the same page.
    Default is 'false'
</description>
    <param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
    <param-value>true</param-value>
  </context-param>
  <servlet>
    <servlet-name>Faces Servlet</servlet-name>
    <servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>Faces Servlet</servlet-name>
    <url-pattern>/faces/*</url-pattern>
    <url-pattern>*.jsf</url-pattern>
    <url-pattern>*.xhtml</url-pattern>
  </servlet-mapping>
</web-app>

和我的 faces-config xml 文件

<?xml version='1.0' encoding='UTF-8'?>
<faces-config 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_1_2.xsd"
    version="1.2">
     <navigation-rule>
        <navigation-case>
            <from-outcome>login</from-outcome>
            <to-view-id>/login.xhtml</to-view-id>
        </navigation-case>
    </navigation-rule>
    <managed-bean>
        <managed-bean-name>home</managed-bean-name>
        <managed-bean-class>com.cation.action.LoginAction</managed-bean-class>
        <managed-bean-scope>request</managed-bean-scope>      
    </managed-bean>
    <navigation-rule>
        <navigation-case>
            <from-outcome>home_page</from-outcome>
            <to-view-id>/pages/homePage.xhtml</to-view-id>
        </navigation-case>
    </navigation-rule>
     <managed-bean>
        <managed-bean-name>user</managed-bean-name>
        <managed-bean-class>com.cation.action.UserAction</managed-bean-class>
        <managed-bean-scope>request</managed-bean-scope>      
    </managed-bean>
    <navigation-rule>
        <navigation-case>
            <from-outcome>addUser</from-outcome>
            <to-view-id>/pages/addUser.xhtml</to-view-id>
        </navigation-case>
    </navigation-rule>
    <navigation-rule>
        <navigation-case>
            <from-outcome>successUser</from-outcome>
            <to-view-id>/pages/success.xhtml</to-view-id>
        </navigation-case>
    </navigation-rule>
</faces-config>

谁能帮我解决这个问题

4

1 回答 1

2

要将导航与 一起使用p:commandButton，您需要使用action属性而不是actionListener。

像这样更改您的按钮：

<p:commandButton id="btn" value="Login" update="panel" action="#{home.validateUser}"/>

您的代码中的其他一切似乎都很好。

更多信息 ：

于 2013-06-18T06:21:36.937 回答