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jsf - Primefaces fileUploadListener 不起作用

转载 作者：行者123 更新时间：2023-12-01 12:44:34 27 4
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这个问题在这里已经有了答案:





How to use PrimeFaces p:fileUpload? Listener method is never invoked or UploadedFile is null / throws an error / not usable

(11 个回答)


6年前关闭。




我试图将带有素面的文件上传到我的 tomcat7 服务器。我正在使用 primfaces4。文件上传监听器不调用 handleFileUpload并且 hiii 没有出现在控制台中
我的 bean 是这样的:

package Pin;
import javax.enterprise.context.SessionScoped;
import javax.faces.bean.ManagedBean;

import org.primefaces.component.fileupload.FileUpload;
import org.primefaces.event.FileUploadEvent;
import org.primefaces.model.UploadedFile;

import Util.U;
@ManagedBean(name="pinBean")
@SessionScoped
public class PinBean{
    private UploadedFile file;
    public PinBean(){

        U.wl("Start");
    }
    public UploadedFile getFile() {
        U.wl("get");
        return file;
    }

    public void setFile(UploadedFile file) {
        U.wl("set");
        this.file = file;
    }
    public void handleFileUpload(FileUploadEvent event) {
        UploadedFile file = event.getFile();
        U.wl("hiii");
        //application code
        }


}

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://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:t="http://myfaces.apache.org/tomahawk"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:a4j="http://richfaces.org/a4j"
xmlns:p="http://primefaces.org/ui">

<h:form>
<h:form enctype="multipart/form-data">
<p:fileUpload fileUploadListener="#{pinBean.handleFileUpload}" auto="true" mode="advanced"/>
</h:form>
</h:form>
</html>

和 web.xml: 
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <display-name>testUpload</display-name>
  <filter>

<filter-name>PrimeFaces FileUpload Filter</filter-name>
<filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
<init-param>
<param-name>thresholdSize</param-name>
<param-value>2097152</param-value>
</init-param>     
</filter>
<filter-mapping>
<filter-name>PrimeFaces FileUpload Filter</filter-name>
<servlet-name>Faces Servlet</servlet-name>
</filter-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>
</servlet-mapping>
</web-app>

最佳答案

最后它起作用了，我使用了简单的上传类型。
重要的事情:

1- <h:head></h:head>是必要的

2- 这在 web.xml 中是必需的:

 <context-param>
    <param-name>primefaces.UPLOADER</param-name>
    <param-value>commons</param-value>
  </context-param>

 <filter>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <servlet-name>Faces Servlet</servlet-name>
</filter-mapping>

3 英寸 h:form重要的是写 enctype="multipart/form-data"
4- ajax="false"命令按钮是必要的

我使用了简单的上传类型: 
<?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://java.sun.com/jsf/html"
xmlns:f="http://java.sun.com/jsf/core"
xmlns:t="http://myfaces.apache.org/tomahawk"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:p="http://primefaces.org/ui">
<h:head></h:head>
<h:form enctype="multipart/form-data">
<p:fileUpload value="#{pinBean.file}" mode="simple" />
<p:commandButton value="Submit" ajax="false"/>
</h:form>

</html>

我的 bean 是: 
package Pin;
import javax.enterprise.context.SessionScoped;
import javax.faces.bean.ManagedBean;

import org.primefaces.component.fileupload.FileUpload;
import org.primefaces.event.FileUploadEvent;
import org.primefaces.model.UploadedFile;

import Util.U;
@ManagedBean(name="pinBean")
@SessionScoped
public class PinBean{
    private UploadedFile file;
    public PinBean(){

        U.wl("Start");
    }
    public UploadedFile getFile() {
        U.wl("get");
        return file;
    }

    public void setFile(UploadedFile file) {
        U.wl("set");
            this.file = file;
        }
}

和我的 web.xml 
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0">
  <display-name>WebOffice</display-name>
  <context-param>
    <param-name>primefaces.UPLOADER</param-name>
    <param-value>commons</param-value>
  </context-param>

 <filter>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <filter-class>org.primefaces.webapp.filter.FileUploadFilter</filter-class>
</filter>
<filter-mapping>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <servlet-name>Faces Servlet</servlet-name>
</filter-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>
  </servlet-mapping>
  <context-param>
    <param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
    <param-value>resources.application</param-value>
  </context-param>
  <context-param>
    <description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
    <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
    <param-value>client</param-value>
  </context-param>
  <context-param>
    <description>
    This parameter tells MyFaces if javascript code should be allowed in
    the rendered HTML output.
    If javascript is allowed, command_link anchors will have javascript code
    that submits the corresponding form.
    If javascript is not allowed, the state saving info and nested parameters
    will be added as url parameters.
    Default is 'true'</description>
    <param-name>org.apache.myfaces.ALLOW_JAVASCRIPT</param-name>
    <param-value>true</param-value>
  </context-param>
  <context-param>
    <description>
    If true, rendered HTML code will be formatted, so that it is 'human-readable'
    i.e. additional line separators and whitespace will be written, that do not
    influence the HTML code.
    Default is 'true'</description>
    <param-name>org.apache.myfaces.PRETTY_HTML</param-name>
    <param-value>true</param-value>
  </context-param>
  <context-param>
    <param-name>org.apache.myfaces.DETECT_JAVASCRIPT</param-name>
    <param-value>false</param-value>
  </context-param>
  <context-param>
    <description>
    If true, a javascript function will be rendered that is able to restore the
    former vertical scroll on every request. Convenient feature if you have pages
    with long lists and you do not want the browser page to always jump to the top
    if you trigger a link or button action that stays on the same page.
    Default is 'false'
</description>
    <param-name>org.apache.myfaces.AUTO_SCROLL</param-name>
    <param-value>true</param-value>
  </context-param>
  <listener>
    <listener-class>org.apache.myfaces.webapp.StartupServletContextListener</listener-class>
  </listener>

  <context-param>
    <param-name>org.apache.myfaces.SERIALIZE_STATE_IN_SESSION</param-name>
    <param-value>false</param-value>
  </context-param>

  <filter>
    <filter-name>Filters</filter-name>
    <filter-class>UserManagement.LoginFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>Filters</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>
    <error-page>
        <error-code>404</error-code>
        <location>/not_exist.jsf</location>
    </error-page>

    <error-page>
        <exception-type>java.lang.Exception</exception-type>
        <location>/exception.jsf</location>
    </error-page>
</web-app>

关于jsf - Primefaces fileUploadListener 不起作用，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/21569805/

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