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Jsf facelets模板和客户端的web.xml设置

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Jsf facelets模板和客户端的web.xml设置,jsf,javabeans,facelets,jsf-2.2,backing-beans,Jsf,Javabeans,Facelets,Jsf 2.2,Backing Beans,我已经看了一些关于JSF和facelets的参考资料，但不了解一些配置点。这两者之间的区别是什么： <url-pattern>/faces/*</url-pattern> 使用此模板： <?xml version='1.0' encoding='UTF-8' ?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DT

我已经看了一些关于JSF和facelets的参考资料，但不了解一些配置点。这两者之间的区别是什么：

<url-pattern>/faces/*</url-pattern>
使用此模板：

<?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://xmlns.jcp.org/jsf/facelets"
      xmlns:h="http://xmlns.jcp.org/jsf/html">
    <h:head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
        <h:outputStylesheet name="./css/default.css"/>
        <h:outputStylesheet name="./css/cssLayout.css"/>
        <title>Facelets Template</title>
    </h:head>
    <h:body>
        <div id="top" class="top">
            <ui:insert name="top">Top</ui:insert>
        </div>
        <div id="content" class="center_content">
            <ui:insert name="content">Content</ui:insert>
        </div>
    </h:body>
</html>

<?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>
相反，EL仅在页面中显示如下内容：

thufir@dur:~$ 
thufir@dur:~$ lynx http://localhost:8080/HelloExpressionLanguage/client.xhtml -dump
<?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://xmlns.jcp.org/jsf/facelets"
      xmlns:h="http://xmlns.jcp.org/jsf/html">
    <body>
        <ui:composition template="./template.xhtml">
            <ui:define name="top">
                top
            </ui:define>
            <ui:define name="content">
                expression language not evaluating?
                <h:outputLabel value="#{hello.hi(fred)}" />
            </ui:define>
        </ui:composition>
    </body>
</html>thufir@dur:~$ 
thufir@dur:~$ 
thufir@dur:~$ lynx http://localhost:8080/HelloExpressionLanguage/ -dump
   top

   expression language not evaluating?
thufir@dur:~$ 
thufir@dur:~$ 

thufir@dur:~$ 
thufir@dur：~$lynxhttp://localhost:8080/HelloExpressionLanguage/client.xhtml -倾倒
顶部
表达式语言不计算？
thufir@dur:~$ 
thufir@dur:~$ 
thufir@dur：~$lynxhttp://localhost:8080/HelloExpressionLanguage/ -倾倒
顶部
表达式语言不计算？
thufir@dur:~$ 
thufir@dur:~$
不清楚您希望在哪里看到预期的“hello fred”输出。 在本例中，您使用ui:insert，但它用于模板

如果要在bean中使用hello方法，则需要使用EL表达式，并为输出使用h:outputLabel标记：

<h:outputLabel value="#{helloWorld.hello('fred')}" />
Update1（如果未处理JSF代码）：

您应该检查web.xml。它必须包含一个servlet和一个侦听器，如下所示：

<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>


Facesservlet
javax.faces.webapp.FacesServlet
1.
Facesservlet
*.jsf
注意：如果使用.xhtml或.hello或其他内容，则必须匹配服务器映射的url模式。

在该“条”中，所需的输出（在一定程度上）是来自hello bean的输出，如下所示：

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>
目录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;
    }

}
HelloBean（注意它是@ManagedBean）：

web.xml文件：

<?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>


javax.faces.DEFAULT_后缀
.xhtml
Facesservlet
javax.faces.webapp.FacesServlet
1.
Facesservlet
*.xhtml
30
index.xhtml
为什么
ui:insert
用于模板？这个例子当然使用了模板，所以我不明白你的意思。使用
ui:insert
？ 
<!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>

<!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>

<!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>

<!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>

<?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>

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;
    }

}

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;
    }

}

<?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>