Jsf 为什么UploadedFile为空?
我正在用Jsf 为什么UploadedFile为空?,jsf,file-upload,primefaces,Jsf,File Upload,Primefaces,我正在用jsf2.2和Primefaces开发一个javaweb应用程序。我想用户可以上传单个文件;为此,我使用了Primefaces 6.0,但它不起作用,我只找到了Primefaces 5.x的教程(和示例),它也不适用于Primefaces 5.0 我倾向于使用Primefaces 6.0,但如果您能帮助我使用Primefaces 5.x版本,那没关系 我的web.xml是: <?xml version="1.0" encoding="UTF-8"?> <web-app
jsf2.2
和Primefaces
开发一个javaweb应用程序。我想用户可以上传单个文件;为此,我使用了Primefaces 6.0
,但它不起作用,我只找到了Primefaces 5.x
的教程(和示例),它也不适用于Primefaces 5.0
我倾向于使用Primefaces 6.0
,但如果您能帮助我使用Primefaces 5.x
版本,那没关系
我的web.xml是:
<?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>primefaces.THEME</param-name>
<param-value>bootstrap</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<filter>
<filter-name>primeFacesFileUploadFilter</filter-name>
<filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>primeFacesFileUploadFilter</filter-name>
<servlet-name>facesServlet</servlet-name>
</filter-mapping>
<context-param>
<param-name>primefaces.UPLOADER</param-name>
<param-value>commons</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/index.xhtml</welcome-file>
</welcome-file-list>
</web-app>
我的xhtml是:
<?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:h="http://xmlns.jcp.org/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Facelet Title</title>
</h:head>
<h:body>
<p:growl autoUpdate="true"/>
<h:form enctype="multipart/form-data">
<p:fileUpload mode="simple" value="#{zipBean.arch}" />
<p:commandButton value="Upload" action="#{zipBean.subir}" ajax="false" />
</h:form>
</h:body>
</html>
Facelet标题
当我上传文件时,p:grow
显示消息文件为空
我有下一个jar
库:
- commons-fileupload-1.3.1.jar
- commons-io-2.4.jar
谢谢大家! 下面是一个如何使用primefaces 5.0上传文件的示例;您不需要commons-fileupload-1.3.1.jar和commons-io-2.4.jar;而且您不需要更改web.xml,也不需要在h:form中声明growl 有关更多信息,请参见此 java
import javax.faces.application.FacesMessage;
import javax.faces.bean.ManagedBean;
import javax.faces.context.FacesContext;
import org.primefaces.model.UploadedFile;
@ManagedBean
public class FileUploadView {
private UploadedFile file;
public UploadedFile getFile() {
return file;
}
public void setFile(UploadedFile file) {
this.file = file;
}
public void upload() {
if(file.getSize() > 0) {
FacesMessage message = new FacesMessage("Succesful", file.getFileName() + " is uploaded.");
FacesContext.getCurrentInstance().addMessage(null, message);
}
else{
FacesMessage message = new FacesMessage("Not Succesful", "file is not uploaded");
FacesContext.getCurrentInstance().addMessage(null, message);
}
}
}
basic.xhtml
<?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:h="http://xmlns.jcp.org/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Facelet Title</title>
</h:head>
<h:body>
<h:form enctype="multipart/form-data">
<p:growl id="messages" showDetail="true" />
<p:fileUpload value="#{fileUploadView.file}" mode="simple" skinSimple="true"/>
<p:commandButton value="Submit" ajax="false" actionListener="#{fileUploadView.upload}" />
</h:form>
</h:body>
</html>
Facelet标题
完美!非常感谢你!
<?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:h="http://xmlns.jcp.org/jsf/html"
xmlns:p="http://primefaces.org/ui">
<h:head>
<title>Facelet Title</title>
</h:head>
<h:body>
<h:form enctype="multipart/form-data">
<p:growl id="messages" showDetail="true" />
<p:fileUpload value="#{fileUploadView.file}" mode="simple" skinSimple="true"/>
<p:commandButton value="Submit" ajax="false" actionListener="#{fileUploadView.upload}" />
</h:form>
</h:body>
</html>