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web.xml setup for facelets template and client

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暗喜 2020-12-22 07:50

I\'ve looked at a few resources for JSF and facelets, but don\'t understand a few configuration points. What\'s the distinction between:
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  • 迷失自我
    2020-12-22 08:01

    It is not clear that where do you want to see the expected "hello fred" output. In the example you use ui:insert, but it for templates.

    if you want to use the hello method in the bean you will need to use an EL expression and for the output a h:outputLabel tag:

    <h:outputLabel value="#{helloWorld.hello('fred')}" />

    Update1 (if JSF code not processed):

    You should check your web.xml. It have to contains a servlet and a listener like this:

    <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>*.jsf</url-pattern>
</servlet-mapping>

    Note: of you use .xhtml or .hello or something else, you have to match the url-pattern of the server-mapping.

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  • 一整个雨季
    2020-12-22 08:17

    The desired output (to an extent), in that "bar" is output, from the Hello bean, below:

    thufir@dur:~$ 
thufir@dur:~$ lynx http://localhost:8080/Birds/falcon.xhtml -dump
                           The Happy Birds Directory

Contents table
     __________________________________________________________________

   [1]Home
   [2]Parrot
   [3]Eagle
   [4]Falcon

                                     Falcon

   The Happy Birds Directory contains birds. bean says bar

References

   1. http://localhost:8080/Birds/falcon.xhtml
   2. http://localhost:8080/Birds/falcon.xhtml
   3. http://localhost:8080/Birds/falcon.xhtml
   4. http://localhost:8080/Birds/falcon.xhtml
thufir@dur:~$

    index.xhtml:

    <!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">

    <body>
        This and everything before will be ignored
        <ui:composition template="template.xhtml">
            <ui:define name="navigation">
                <ui:include src="menu.xhtml"/>
            </ui:define>
        </ui:composition>
        This and everything after will be ignored
    </body>
</html>

    menu:

    <!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">
    <body>
        This and everything before will be ignored
        <ui:composition>
            <h3>Contents table</h3>
            <hr/>
            <h:panelGrid columns="1">
                <h:commandLink value="Home" action="home" />
                <h:commandLink value="Parrot"
                               action="parrot" />
                <h:commandLink value="Eagle"
                               action="eagle" />
                <h:commandLink value="Falcon"
                               action="falcon" />
            </h:panelGrid>
        </ui:composition>
        This and everything after will be ignored
    </body>
</html>

    parrot:

    <!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">
    <body>
        This and everything before will be ignored
        <ui:composition template="template.xhtml">
            <ui:define name="navigation">
                <ui:include src="menu.xhtml"/>
            </ui:define>
            <ui:define name="main">
                <h1>Parrot</h1>
                <p>
                    Parrots are interesting birds...
                </p>
            </ui:define>
        </ui:composition>
        This and everything after will be ignored
    </body>
</html>

    the falcon, speaks, to an extent:

    <!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">
    <body>
        This and everything before will be ignored
        <ui:composition template="template.xhtml">
            <ui:define name="navigation">
                <ui:include src="menu.xhtml"/>
            </ui:define>
            <ui:define name="main">
                <h1>Falcon</h1>
                <p>
                    <p>The Happy Birds Directory
                        contains #{directoryBean.totalCount} birds.
                        bean says #{hello.foo()}
                    </p>
                </p>
            </ui:define>
        </ui:composition>
        This and everything after will be ignored
    </body>
</html>

    however, output from the directoryBean doesn't get put into the web page.

    the template:

    <?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">
    <head>
        <title>The Happy Birds Directory</title>
        <style type="text/css">
            <!--
            .box {
                float: right;
                width: 50%;
                border: black dotted 1px;
                padding: 5px
            }
            -->
        </style>
    </head>
    <body>
        <h:form>
            <h1>The Happy Birds Directory</h1>
            <div class="box">
                <ui:insert name="navigation"/>
            </div>
            <ui:insert name="main">
                Welcome to the nest!
            </ui:insert>
        </h:form>
    </body>
</html>

    directory bean:

    package dur;

import javax.faces.bean.SessionScoped;
import javax.inject.Named;

@Named
@SessionScoped
public class DirectoryBean {

    private int totalCount = 99;

    public DirectoryBean() {
    }

    public int getTotalCount() {
        System.out.println(totalCount);
        return totalCount;
    }

}

    hello bean (note that it's @ManagedBean):

    package dur;

import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.inject.Named;

@Named
@SessionScoped
@ManagedBean(name = "hello")
public class Hello {

    public Hello() {
    }

    public String foo() {
        return "bar";
    }

    public String hi(String name) {
        return "hi " + name;
    }

}

    the web.xml:

    <?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" 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-app_3_1.xsd">
    <context-param>
        <param-name>javax.faces.DEFAULT_SUFFIX</param-name>
        <param-value>.xhtml</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>*.xhtml</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.xhtml</welcome-file>
    </welcome-file-list>
</web-app>
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