我已经查看了JSF和facelets的一些资源,但是不了解一些配置点。有什么区别:
<url-pattern>/faces/*</url-pattern>
和
<url-pattern>*.jsf</url-pattern>
虽然我理解可能有几个url-pattern
元素,除非明确使用.jsf页面,否则实际上不需要这个映射,对吗?如果只使用面向模板和客户端,那么这是无关紧要的吗?
此外,如果facelet模板和客户端位于WEB-INF
内,他们如何访问?
对于JSF和Facelets的最新版本,似乎没有faces-config.xml
的硬性要求;正确的吗?
最后,如果Glassfish与facelets客户端/模板一起使用,那么EL是通过CDI吗?
总的来说,为什么不是这个客户:
<?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>
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>
使用此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.PROJECT_STAGE</param-name>
<param-value>Development</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>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>faces/client.xhtml</welcome-file>
</welcome-file-list>
</web-app>
使用这个bean:
package pkg;
import javax.faces.bean.SessionScoped;
import javax.inject.Named;
@Named
@SessionScoped
public class Hello {
public Hello() {
}
public String hi(String name) {
return "hi " + name;
}
}
相反,EL只是在页面中显示为:
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:~$
答案 0 :(得分:1)
目前尚不清楚你想在哪里看到预期的&#34;你好弗雷德&#34;输出。 在示例中,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):
您应该检查您的web.xml。它必须包含一个servlet和一个这样的监听器:
<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>
注意:你使用.xhtml或.hello或其他东西,你必须匹配服务器映射的url模式。
答案 1 :(得分:0)
所需的输出(在一定程度上),在&#34; bar&#34;从Hello bean输出,位于:
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:~$
的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>
菜单:
<!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>
鹦鹉:
<!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>
但是,directoryBean
的输出不会被放入网页。
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://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>
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;
}
}
hello bean(注意它的@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;
}
}
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>