Question

首先，我想告诉您，我已经在SO上浏览了相同的问题很长一段时间但没有任何帮助。我有一个项目，我想让AuthBean来处理身份验证，但是我一直收到已知错误消息的HTTP 500错误

javax.servlet.ServletException: /login.xhtml @14,45 value="#{authBean.login}": Target Unreachable, identifier 'authBean' resolved to null

我使用GlassFish 4服务器作为Java EE运行时环境。

到目前为止，我已经尝试了

重新启动GlassFish服务器，从服务器中删除该应用程序并重新部署。
在javax.faces.bean.SessionScoped和javax.enterprise.context.SessionScoped之间切换。
检查AuthBean.class是否在class文件夹中。
明确命名我的bean（如下所示）

这是我的档案。任何帮助表示赞赏。

AuthBean.java

package pis.back;

import javax.ejb.EJB;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;

import pis.data.Person;
import pis.service.PersonManager;

@ManagedBean(name = "authBean")
@SessionScoped
public class AuthBean {
    private boolean loggedIn;
    private String login;
    private String password;
    @EJB
    private PersonManager personMgr;

    public String getLogin() {
        return login;
    }

    public void setLogin(String login) {
        this.login = login;
    }

    public String getPassword() {
        return password;
    }

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

    /*public boolean isLoggedIn() {
        return this.loggedIn;
    }*/

    public String performLogin() {
        if (loggedIn) {
            return "error";
        }

        Person person = personMgr.findByLogin(this.login);
        if (person == null || !this.password.equals(person.getPassword())) {
            return "error";
        }

        loggedIn = true;
        return "ok";
    }

    public String performLogout() {
        if (!loggedIn) {
            return "error";
        }

        loggedIn = false;
        return "ok";
    }
}

面-config.xml中

<?xml version="1.0" encoding="UTF-8"?>
<faces-config
    xmlns="http://xmlns.jcp.org/xml/ns/javaee"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd"
    version="2.2">

</faces-config>

的web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
  <display-name>pis</display-name>
  <welcome-file-list>
    <welcome-file>index.xhtml</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.xhtml</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
  <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>*.xhtml</url-pattern>
  </servlet-mapping>
  <filter>
    <filter-name>AuthFilter</filter-name>
    <filter-class>pis.back.AuthFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>AuthFilter</filter-name>
    <url-pattern>*.xhtml</url-pattern>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>FORWARD</dispatcher>
    <dispatcher>INCLUDE</dispatcher>
  </filter-mapping>
</web-app>

的glassfish-web.xml中

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE glassfish-web-app PUBLIC "-//GlassFish.org//DTD GlassFish Application Server 3.1 Servlet 3.0//EN" "http://glassfish.org/dtds/glassfish-web-app_3_0-1.dtd">
<glassfish-web-app>
    <context-root>/pis</context-root>
</glassfish-web-app>

login.xhtml

<?xml version="1.0" encoding="utf-8" ?>
<!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:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core">

<ui:composition template="template.xhtml">
    <ui:define name="title">Login</ui:define>
    <ui:define name="content">
        <h:form>
            <h:panelGrid columns="2">
                <h:outputLabel value="Login: "/>
                <h:inputText value="#{authBean.login}"/>
                <h:outputLabel value="Password: "/>
                <h:inputSecret value="#{authBean.password}"/>
                <h:commandButton action="#{authBean.performLogin}" value="Login"/>
            </h:panelGrid>
        </h:form>
    </ui:define>
</ui:composition>
</html>

的template.xhtml

<?xml version="1.0" encoding="utf-8" ?>
<!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:ui="http://java.sun.com/jsf/facelets"
    xmlns:h="http://java.sun.com/jsf/html"
    xmlns:f="http://java.sun.com/jsf/core"
    xmlns:p="http://primefaces.org/ui">
<h:head>
    <title><ui:insert name="title"/></title>
</h:head>

<h:body>
    <div id="header">
        Here comes header
    </div>
    <div id="menu">
        Here comes menu
    </div>
    <div id="content">
        <h2><ui:insert name="title"/></h2>
        <ui:insert name="content"/>
    </div>
    <div id="footer">
        Here comes footer
    </div>
</h:body>
</html>

Answer 1

由于BalusC建议我完全重新安装GlassFish服务器，它开始重新运行。

Bean - 目标无法访问，标识符已解析为null

1 个答案: