问题:托管 Bean 未通过模板注入(inject)。
目标:我想减缓模板中的注销按钮。
场景:我正在使用 jsf 2.0 为 Web 部件构建 j2ee 6 应用程序。
模板文件布局/template.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"
>
<h:head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
<link href="/resources/css/default.css" rel="stylesheet" type="text/css"/>
<link href="/resources/css/cssLayout.css" rel="stylesheet" type="text/css"/>
<title>Facelets Template</title>
</h:head>
<h:body>
<div id="baner" class="baner" >
<ui:insert name="baner" >
<h:panelGrid style="color:blue; width:100%; height:100px;" border="5">
Baner Name go here
</h:panelGrid>
</ui:insert>
</div>
<div id="menu" class="menu">
<ui:insert name="menu">
some...
</ui:insert>
</div>
<div id="top" class="top">
<ui:insert name="top">Top Section</ui:insert>
</div>
<div>
<div id="left">
<ui:insert name="left">
<h:commandButton value="Do log out" action="#{securityBacking.invalidate}" />
<h:commandButton value="log out" action="#{securityBacking.logout}" />
</ui:insert>
<!--log out-->
</div>
<div id="content" class="left_content">
<ui:insert name="content">Main Content</ui:insert>
</div>
</div>
</h:body>
</html>
模板客户端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:h="http://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:vt="http://java.sun.com/jsf/composite/security">
<body>
<ui:composition template="layout/template.xhtml">
<ui:define name="top">
<h:form>
<h:panelGrid border="4">
<!--TODO add i18n-->
<p style="color:red;">Partner`s login.</p>
<vt:loginPanel/>
<f:view>
<h:outputLabel value="#{rulesBean.userPrincipalName}"/>
<h:outputLabel value="#{rulesBean.user}"/>
<h:outputLabel value="#{rulesBean.manager}"/>
<h:commandButton value="Do log out" action="#{securityBacking.invalidate}" />
<h:commandButton value="log out" action="#{securityBacking.logout}" />
</f:view>
</h:panelGrid>
</h:form>
</ui:define>
</ui:composition>
</body>
</html>
web.xml 中的faces 声明
<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>
SecurityBacking.java:
@Named("securityBacking")
@RequestScoped
public class SecurityBacking {
public String logout() {
String result = "/login?faces-redirect=true";
FacesContext context = FacesContext.getCurrentInstance();
HttpServletRequest request = (HttpServletRequest) context.
getExternalContext().getRequest();
try {
System.out.println("calling logout");
request.logout();
System.out.println("called logout");
} catch (ServletException ex) {
Logger.getLogger(SecurityBacking.class.getName()).
log(Level.SEVERE, null, ex);
result = "/loginError?faces-redirect=true";
}
return result;
}
public boolean isInRole(String role) {
ExternalContext external = FacesContext.getCurrentInstance().getExternalContext();
HttpServletRequest request = (HttpServletRequest) external.getRequest();
String user = request.getRemoteUser();
return request.isUserInRole("partner");
}
public void invalidate() {
try {
HttpServletRequest request = (HttpServletRequest) FacesContext.getCurrentInstance().getExternalContext().getRequest();
HttpServletResponse response = (HttpServletResponse) FacesContext.getCurrentInstance().getExternalContext().getResponse();
request.getSession(false).invalidate();
response.sendRedirect(request.getContextPath());
} catch (IOException e) {
e.printStackTrace();
}
}
}
如你所见:
<h:commandButton value="log out" action="#{securityBacking.logout}" />
和
<h:commandButton value="Do log out" action="#{securityBacking.invalidate}" />
在layout/template.xhtml和index.xhtml中减速，但是在layout/template.xhtml中减速的按钮不能同时工作，它们在index.xhtml中工作。
当我查看 Safari Web Inspector 时，我看到:
在index.xhtml中减速
<input xmlns="http://www.w3.org/1999/xhtml" type="submit" name="j_idt12:j_idt29" value="log out" />
以及layout/template.xhtml
<input xmlns="http://www.w3.org/1999/xhtml" type="submit" name="j_idt32" value="log out" />
据我了解，bean 不会在标记内注入(inject) daclet 模板，但我在 j2ee 6 教程和规范中没有找到任何有关此内容的信息，或者也许 рфмут'е 注意到此类信息。
问题1:我关于注入(inject)的说法正确吗？
问题2:为什么不通过模板注入(inject)？
Q3:在这种情况下，模板化的不同方式是什么？
问题 4:此案例的最佳实践是什么？
(我正在使用 glassfish v3 网络服务器)
谢谢!
最佳答案
模板中的按钮未嵌套在 <h:form> 中。移动<h:form>将元素从您的index.xhtml移出并放入您的模板中，或者将模板按钮包装在辅助表单中。
关于java - JSF 2.0 MB 的模板化和注入(inject) || CDI bean ，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/3092892/