我在使用 Eclipse Kepler 的 Google App Engine 项目 (api-1.0-sdk-1.8.4) 中使用 Mojarra 2.2.0 和 tomahawk12-1.1.14 (t:inputFileUpload)。
该项目在从 Eclipse 本地运行时运行良好,但如果在尝试上传文件时部署到 Google App Engine 会出现以下错误:
/faces/tmotifs.xhtml
java.lang.NullPointerException
at java.io.File.<init>(File.java:290)
at org.apache.myfaces.webapp.filter.MultipartRequestWrapper.parseRequest(MultipartRequestWrapper.java:141)
at org.apache.myfaces.webapp.filter.MultipartRequestWrapper.getParameter(MultipartRequestWrapper.java:299)
at com.sun.faces.context.RequestParameterMap.get(RequestParameterMap.java:75)
at com.sun.faces.context.RequestParameterMap.get(RequestParameterMap.java:56)
at java.util.Collections$UnmodifiableMap.get(Collections.java:1339)
...
我在 tmotifs.xhtml 中使用文件上传组件,如下所示:
<h:form enctype="multipart/form-data">
<t:inputFileUpload value="#{trainingBean.uploadedFile}"
accept="text/x-fasta" requiredMessage="A fasta file must be selected" />
<h:commandButton value="Refresh" actionListener="#{trainingBean.upload}" />
....
支持 bean 如下所示:
@ManagedBean
@SessionScoped
public class TrainingBean implements Serializable {
private static final long serialVersionUID = 1L;
private UploadedFile uploadedFile;
public UploadedFile getUploadedFile() {
return uploadedFile;
}
public void setUploadedFile(UploadedFile uploadedFile) {
this.uploadedFile = uploadedFile;
}
public void upload() {
if( uploadedFile == null ) {
refresh();
return;
}
this.inputList.clear();
try {
Reader rd = new InputStreamReader(uploadedFile.getInputStream());
inputGroupList = InputGroup.readEntries(rd);
rd.close();
for( InputGroup p : inputGroupList )
this.inputList.addAll(p.getMotifs());
uploadError = null;
inputFileName = uploadedFile.getName();
} catch (IOException e) {
uploadError = e.getMessage();
e.printStackTrace();
} catch( InvalidSequenceException e ) {
uploadError = e.getMessage();
e.printStackTrace();
}
refresh();
}
...
和 web.xml:
<?xml version="1.0" encoding="utf-8" standalone="no"?>
<web-app
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
version="2.5"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<display-name>JavaServerFaces</display-name>
<context-param>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<!--<param-value>client</param-value>-->
<param-value>server</param-value>
</context-param>
<context-param>
<param-name>javax.faces.DEFAULT_SUFFIX</param-name>
<param-value>.xhtml</param-value>
</context-param>
<context-param>
<param-name>com.sun.faces.expressionFactory</param-name>
<param-value>com.sun.el.ExpressionFactoryImpl</param-value>
</context-param>
<!-- Disable use of threading for single-threaded environments such as the Google AppEngine. -->
<context-param>
<param-name>com.sun.faces.enableThreading</param-name>
<param-value>false</param-value>
</context-param>
<!-- Change to "Production" when you are ready to deploy -->
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<context-param>
<param-name>javax.faces.FACELETS_SKIP_COMMENTS</param-name>
<param-value>true</param-value>
</context-param>
<!-- ***** Specify session timeout of thirty (30) minutes. ***** -->
<session-config>
<session-timeout>30</session-timeout>
</session-config>
<!-- Welcome page -->
<welcome-file-list>
<welcome-file>faces/home.xhtml</welcome-file>
</welcome-file-list>
<!-- JSF mapping -->
<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>
<url-pattern>*.jsf</url-pattern>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
<!-- MyFaces Tomahawk -->
<filter>
<filter-name>MyFacesExtensionsFilter</filter-name>
<filter-class>org.apache.myfaces.webapp.filter.ExtensionsFilter</filter-class>
<init-param>
<param-name>uploadMaxFileSize</param-name>
<param-value>20m</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>MyFacesExtensionsFilter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
</filter-mapping>
<filter-mapping>
<filter-name>MyFacesExtensionsFilter</filter-name>
<url-pattern>/faces/myFacesExtensionResource/*</url-pattern>
</filter-mapping>
<error-page>
<exception-type>javax.faces.application.ViewExpiredException</exception-type>
<location>/faces/home.xhtml</location>
</error-page>
<!-- System -->
<servlet>
<servlet-name>SystemServiceServlet</servlet-name>
<servlet-class>com.google.api.server.spi.SystemServiceServlet</servlet-class>
<init-param>
<param-name>services</param-name>
<param-value/>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>SystemServiceServlet</servlet-name>
<url-pattern>/_ah/spi/*</url-pattern>
</servlet-mapping>
<listener>
<listener-class>es.ehu.grk.wregex.gae.ServletListener</listener-class>
</listener>
</web-app>
所以我的问题是,我错过了什么吗?为什么 t:inputFileUpload 在本地 GAE 服务器上运行时工作正常,但在部署时却不行?
任何帮助/方向都会受到欢迎。先感谢您!