Faces托管属性使用xml工作，但不使用注释

Question

我有一个与JSF 2有关的问题。我使用的是带有Tomcat6服务器的2.1.4版本。我正在迁移一个最初为jsf1.2编写的应用程序。据此，应用程序的每个JSF托管bean都在faces-managed-beans.xml文件中声明。当我尝试使用新的JSF 2@ManagedProperty注释设置属性时，问题就出现了。例如，此代码适用于我。

<managed-bean>
<managed-bean-name>navegableSessionParamsManager</managed-bean-name>
<managed-bean-class>com.tesicnor.system.view.beans.navegable.NavegableSessionParamsManager</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
<managed-property>
<property-name>_LoggedBean</property-name>
<value>#{loggedBean}</value>
</managed-property>
<managed-property>
<property-name>_LocaleBean</property-name>
<value>#{localeBean}</value>
</managed-property>
</managed-bean>

会话范围的navegableSessionParamsManager bean正在接收loggedBean和localeBean值，这两个值也是会话范围的bean。但是，如果我使用注释，我会声明三个@ManagedBean和@SessionScoped，并且我会使用@ManagedProperty("#{loggedBean｝")以及@ManagedProperty"#{localeBean}")，但是没有设置属性。

LoggedBean类。

@ManagedBean
@SessionScoped
public class LoggedBean extends BaseBean implements Observer {
/**
* 
*/
private static final long serialVersionUID = 1L; 
...

NavegableSessionParamsManager类

@SuppressWarnings("serial")
@ManagedBean
@SessionScoped
public class NavegableSessionParamsManager extends SystemNavegable {
@ManagedProperty("#{loggedBean}")
private LoggedBean _LoggedBean;
public void set_LoggedBean(LoggedBean _LoggedBean) {
this._LoggedBean = _LoggedBean;
}
...

这是我的web.xml文件

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.5"
xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>System_V4</display-name>
<context-param>
<param-name>javax.faces.CONFIG_FILES</param-name>
<param-value>/WEB-INF/faces-config.xml, /WEB-INF/faces-managed-beans.xml, /WEB-INF/faces-navigation.xml</param-value>
</context-param>
<context-param>
<description>Do not render comments in facelets (xhtml) pages. Default is false.</description>
<param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
<param-value>true</param-value>
</context-param>
<context-param>
<description>
Define the value returned by Application.getProjectStage(). Allowed values: Production, Development,
UnitTest, SystemTest, Extension. Default value is Production.
</description>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<context-param>
<param-name>primefaces.THEME</param-name>
<param-value>pepper-grinder</param-value>
</context-param>
<!-- filter enforcing charset UTF-8 - must be first filter in the chain! -->
<filter>
<filter-name>characterEncodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>utf-8</param-value>
</init-param>
<init-param>
<param-name>forceEncoding</param-name>
<param-value>true</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>characterEncodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

<!-- Advanced Security Filter -->
<!-- FILTRO PROPIO. -->
<filter>
<filter-name>SystemFilter</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>SystemFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>springSecurityFilterChain</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>springSecurityFilterChain</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter>
<filter-name>SystemUrlFilter</filter-name>
<filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
</filter>
<filter-mapping>
<filter-name>SystemUrlFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<!-- Filter to set character encoding on each request "Set Character Encoding" 
for "X-UA-Compatible" de microsoft -->
<filter>
<filter-name>SetHttpHeadersFilter</filter-name>
<filter-class>com.tesicnor.system.view.filters.SetHttpHeadersFilter</filter-class>
<init-param>
<param-name>X-UA-Compatible</param-name>
<param-value>IE=EmulateIE7</param-value>
</init-param>
</filter>
<!-- Primefaces -->
<filter>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>SetHttpHeadersFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<filter-mapping>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
<listener>
<listener-class>org.quartz.ee.servlet.QuartzInitializerListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>com.tesicnor.system.view.session.WebSessionListener</listener-class>
</listener>
<listener>
<listener-class>com.tesicnor.system.view.session.WebRequestListener</listener-class>
</listener>
<!-- FIN JavaServer Faces Faces Servlet -->
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- SERVLET DE CXF (Web Services) -->
<servlet>
<servlet-name>CXFServlet</servlet-name>
<servlet-class>org.apache.cxf.transport.servlet.CXFServlet</servlet-class>
</servlet>
<!-- FIN Faces Servlet Faces Servlet Mapping -->
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>/faces/*</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>CXFServlet</servlet-name>
<url-pattern>/ws/*</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>60</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
<error-page>
<error-code>404</error-code>
<location>/404.xhtml</location>
</error-page>

我不知道在JSF 2中使用注释有什么好处，但每个人都在这么做。此外，如果我对同一个bean使用注释和xmlbean映射，我会遇到麻烦吗？

Answer 1

确保您的三个faces-config.xml文件是2.0或更高版本。另请参阅JSR314规范中的扫描注释类的要求一章。

Answer 2

这个答案是基于这样的假设，即您仍然在faces-config.xml中定义了bean。

您已经提到您已迁移到JSF2。那么，你是否仍然像在OP中那样在faces-config.xml中定义了NavegableSessionParamsManagerbean。如果你在faces-config.xml中定义了NavegableSessionParamsManager，并且你用@ManagedProperty进行了注释，那么服务器将首先实例化在faces-cnfig.xml中定义的任何内容。

因为xml文件将在servlet容器启动时占据优先地位，在这种情况下，java代码中的内容将被简单地忽略。

如果您在faces-config.xml中注释掉代码，那么您使用的任何注释都可以正常工作。也许你不得不这样做。

<--- <managed-bean>
<managed-bean-name>navegableSessionParamsManager</managed-bean-name>
<managed-bean-class>com.tesicnor.system.view.beans.navegable.NavegableSessionParamsManager</managed-bean-class>
<managed-bean-scope>session</managed-bean-scope>
<managed-property>
<property-name>_LoggedBean</property-name>
<value>#{loggedBean}</value>
</managed-property>
<managed-property>
<property-name>_LocaleBean</property-name>
<value>#{localeBean}</value>
</managed-property>
</managed-bean>---->

现在尝试使用注释。

Answer 3

过了一段时间，我终于解决了在web.xml中添加*.faces和*.xhmtmlservlet映射的问题，这在以前是不需要的。

有了这个：

<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.faces</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>

现在注释正在工作。