Tomcat 7 上首次测试时从 Servlet 空白调用的 JSF 页面

Question

虽然我通过 these four SO questions 进行了爬行，但当我在 servlet 中创建的第一个 JSF 页面被调用时，我仍然只得到一个空白页面。它通过 IntelliJ IDEA 部署在 Tomcat 7 服务器上。在错误日志级别 "all"，我没有收到任何错误消息。浏览器中的源代码完全是空的。似乎没有调用 FacesServlet，但在我看来，这不可能是由于 url-映射，我觉得没问题！？？有没有其他的可能，比如查看错误日志？

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"
         version="3.1">
    <context-param>
        <param-name>incomingURLs</param-name>
        <param-value>http://localhost:8080,http://localhost:63342,https://localhost:63342</param-value>
    </context-param>
    <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <param-value>Development</param-value>
    </context-param>
    <context-param>
        <param-name>javax.faces.FACELETS_VIEW_MAPPINGS</param-name>
        <param-value>*.xhtml</param-value>
    </context-param>
    <servlet>
        <servlet-name>Diagapp</servlet-name>
        <servlet-class>com.brainsee.diagapp.DispatcherServlet</servlet-class>
        <multipart-config>
            <location>/tmp</location>
            <max-file-size>20848820</max-file-size>
            <max-request-size>418018841</max-request-size>
            <file-size-threshold>1048576</file-size-threshold>
        </multipart-config>
    </servlet>
    <servlet-mapping>
        <servlet-name>Diagapp</servlet-name>
        <url-pattern>/diagapp</url-pattern>
    </servlet-mapping>
    <servlet>
        <servlet-name>Logoff</servlet-name>
        <servlet-class>com.brainsee.diagapp.Logoff</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>Logoff</servlet-name>
        <url-pattern>/logoff</url-pattern>
    </servlet-mapping>
    <filter>
        <filter-name>CORS</filter-name>
        <filter-class>com.thetransactioncompany.cors.CORSFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>CORS</filter-name>
        <url-pattern>/*</url-pattern>
    </filter-mapping>
    <filter>
        <filter-name>LoginFilter</filter-name>
        <filter-class>com.brainsee.diagapp.LoginFilter</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>LoginFilter</filter-name>
        <url-pattern>/diagapp/admin</url-pattern>
    </filter-mapping>
    <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>
</web-app>

diagnosesedit.xhtml:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:h="http://java.sun.com/jsf/html">
<h:head>
    <title>Diagnoseeditor</title>
</h:head>
<h:body>
    <h3>Diagnosen</h3>
    <h:form rendered="#{not empty diagnosisBean.list}">
        <h:dataTable value="#{diagnosisBean.list}" var="diagnosis">
            <h:column><f:facet name="header">ID</f:facet>#{diagnosis.id}</h:column>
            <h:column><f:facet name="header">Text</f:facet>#{diagnosis.text}</h:column>
            <h:column><f:facet name="header">Alternativname</f:facet>#{diagnosis.altname}</h:column>
            <h:column><f:facet name="header">2. Alternativname</f:facet>#{diagnosis.altname2}</h:column>
            <h:column><f:facet name="header">ICD-10</f:facet>#{diagnosis.icd10}</h:column>
            <h:column><f:facet name="header">Alpha-ID</f:facet>#{diagnosis.alphaid}</h:column>
            <h:column><h:commandButton value="edit" action="#{diagnosisBean.edit(diagnosis)}" /></h:column>
            <h:column><h:commandButton value="delete" action="#{diagnosisBean.delete(diagnosis)}" /></h:column>
        </h:dataTable>
    </h:form>
    <h:panelGroup rendered="#{empty diagnosisBean.list}">
        <p>Table is empty! Please add new diagnoses.</p>
    </h:panelGroup>
    <h:panelGroup rendered="#{!diagnosisBean.edited}">
        <h3>Add diagnosis</h3>
        <h:form>
            <p>Value: <h:inputText value="#{diagnosisBean.diagnosis.value}" /></p>
            <p><h:commandButton value="add" action="#{diagnosisBean.add}" /></p>
        </h:form>
    </h:panelGroup>
    <h:panelGroup rendered="#{diagnosisBean.edited}">
        <h3>Edit diagnosis #{diagnosisBean.diagnosis.id}</h3>
        <h:form>
            <p>Value: <h:inputText value="#{diagnosisBean.diagnosis.value}" /></p>
            <p><h:commandButton value="save" action="#{diagnosisBean.save}" /></p>
        </h:form>
    </h:panelGroup>
</h:body>
</html>

它在我的 DispatcherServlet 中被调用

response.sendRedirect("admin/diagnosesedit.xhtml");

来自同一目录中的 jsp 文件。

WEB-INF/faces-config.xml:

<?xml version='1.0' encoding='UTF-8'?>
<faces-config version="2.2" 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">
    <managed-bean>
        <managed-bean-name>diagnosisBean</managed-bean-name>
        <managed-bean-class>com.brainsee.diagapp.beans.DiagnosisBean</managed-bean-class>
        <managed-bean-scope>session</managed-bean-scope>
    </managed-bean>
</faces-config>

以及 DiagnosisBean：

import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ViewScoped;
import java.io.Serializable;
import java.util.List;

@ManagedBean
@ViewScoped
public class DiagnosisBean implements Serializable {
    private List<Diagnosis> list;
    private Diagnosis diagnosis = new Diagnosis();
    private boolean edited;

    @PostConstruct
    public void init() {
        list = DiagnosisDAO.getAll();
    }

    public void add() {
        DiagnosisDAO.insert(diagnosis);
        diagnosis = new Diagnosis();
    }

    public void edit(Diagnosis diagnosis) {
        this.diagnosis = diagnosis;
        edited = true;
    }

    public void save() {
        DiagnosisDAO.update(diagnosis);
        diagnosis = new Diagnosis();
        edited = false;
    }

    public void delete(Diagnosis diagnosis) {
        DiagnosisDAO.delete(diagnosis);
    }

    public List<Diagnosis> getList() {
        return list;
    }

    public Diagnosis getDiagnosis() {
        return diagnosis;
    }

    public boolean isEdited() {
        return edited;
    }
}

在我的依赖项中，Mojarra-1.2 和 javax.faces:javax-faces-api:2.2 包含在 "Provided" 范围内（将其更改为 "compile" 不会'改变任何东西）。

Answer 1

.....ARRRRGH 刚刚查看了 great JSF wiki 并看到我使用的是 Servlet 3.0 功能，但将过时的 Mojarra-1.2 作为库。更新了库，voilà，它工作了。所以 RTFM :)

Tomcat 7 上首次测试时从 Servlet 空白调用的 JSF 页面

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