primefaces upload not doing anything [duplicate]

问题

i am now trying to use primefaces instead of a home-brewed file upload system, only problem i am having is it seems not to do anything, any ideas why ?

i am using glassfish, and i have added

commons-io-1.4.jar commons-fileupload-1.2.1/jar

to my libraries in netbeans

heres my xhtml

<p:fileUpload fileUploadListener="#{fileUploadController.upload}"
                                  mode="advanced" 
                                  update="messages"
                                  sizeLimit="100000000" 
                                  allowTypes="/(\.|\/)(gif|jpe?g|png)$/"/>

                    <p:growl id="messages" showDetail="true"/>

web.xml,

          <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>51200</param-value>
    </init-param>
    <init-param>
        <param-name>uploadDirectory</param-name>
        <param-value>C:\Users\Richard\printing~subversion\fileupload\web\Uploaded</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>PrimeFaces FileUpload Filter</filter-name>
    <servlet-name>Faces Servlet</servlet-name>
</filter-mapping>

FileUploadController.java

    @ManagedBean(name="fileUploadController")
public class FileUploadController {
   private String destination="C:/Users/Richard/printing~subversion/fileupload/web/Uploaded";

    public void upload(FileUploadEvent event) {  
        FacesMessage msg = new FacesMessage("Success! ", event.getFile().getFileName() + " is uploaded.");  
        FacesContext.getCurrentInstance().addMessage(null, msg);
        // Do what you want with the file        
        try {
            copyFile(event.getFile().getFileName(), event.getFile().getInputstream());
        } catch (IOException e) {
            e.printStackTrace();
        }

    }  

    public void copyFile(String fileName, InputStream in) {
           try {


                // write the inputStream to a FileOutputStream
                OutputStream out = new FileOutputStream(new File(destination + fileName));

                int read = 0;
                byte[] bytes = new byte[1024];

                while ((read = in.read(bytes)) != -1) {
                    out.write(bytes, 0, read);
                }

                in.close();
                out.flush();
                out.close();

                System.out.println("New file created!");
                } catch (IOException e) {
                System.out.println(e.getMessage());
                }
    }
}

i have also tried this example : http://e-blog-java.blogspot.co.uk/2010/04/ppr-multi-file-upload-with-primefaces.html

but the issue is when i copy the code i can not get the upload to display ?

anyone got any ideas whats going on ?

Thanks

回答1:

Have you included the necessary imports in your project? If I remember correctly I once used primefaces upload and I needed to include a specific maven dependency for that upload thing.

After a quick google:

Commons IO
Commons File Upload

Or maven style:

<dependency>
    <groupId>commons-io</groupId>
    <artifactId>commons-io</artifactId>
    <version>1.3.2</version>
</dependency>
<dependency>
    <groupId>commons-fileupload</groupId>
    <artifactId>commons-fileupload</artifactId>
    <version>1.2.1</version>
</dependency>

Combined with the answer above :)

fileUploadListener="#{uploaderBB.handleFileUpload}"

Resource: Resource

回答2:

OK solved the issue !, with primefaces you must put the filter first, before any other filters you might have ( i did have a filter from a previous file upload) so now my web.xml looks like :

<!-- <filter>
            <filter-name>Upload Filter</filter-name>
            <filter-class>richard.fileupload.UploadFilter</filter-class>
            <init-param>
                <param-name>sizeThreshold</param-name>
                <param-value>1024</param-value>
            </init-param>
        </filter>
        <filter-mapping>
            <filter-name>Upload Filter</filter-name>
            <url-pattern>/upload/*</url-pattern>
        </filter-mapping> -->
        <context-param>
            <param-name>javax.faces.STATE_SAVING_METHOD</param-name>
            <param-value>server</param-value>
        </context-param>
        <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>20480</param-value>
            </init-param>
            <init-param>
                <param-name>uploadDirectory</param-name>
                <param-value>C:/Users/Richard/printing~subversion/fileupload/web/WEB-INF/uploaded</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>
        </servlet>
        <servlet-mapping>
            <servlet-name>Faces Servlet</servlet-name>
            <url-pattern>*.xhtml</url-pattern>
        </servlet-mapping>
        <welcome-file-list>
            <welcome-file>/GUI/index.xhtml</welcome-file>
        </welcome-file-list>
        <context-param>
            <param-name>javax.faces.PROJECT_STAGE</param-name>
            <param-value>Development</param-value>
        </context-param>
        <context-param>
            <param-name>facelets.LIBRARIES</param-name>
            <param-value>/WEB-INF/corejsf.taglib.xml</param-value>
        </context-param>
        <context-param>
            <param-name>javax.faces.INTERPRET_EMPTY_STRING_SUBMITTED_VALUES_AS_NULL</param-name>
            <param-value>true</param-value>
        </context-param>

only thing i have noticed is now they are uploaded as a TMP file, can i still use this file for example to print out later on ?

回答3:

EDIT

This question was from January 2013 when there was only PrimeFaces 3.5. For 3.5, the default was commons-fileupload. So for 3.5, the context-param below is not required.

If you are using PrimeFaces 4 and have this problem:

The default for PrimeFaces 4 is 'native'. If you want to use commons-fileupload you need to include this parameter in your web.xml:

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

With WebLogic I was using the default but when attempting to upload, nothing happened. There was no error. With Tomcat it was fine either way. I have only tried it with Tomcat ant WebLogic.

来源：https://stackoverflow.com/questions/14562267/primefaces-upload-not-doing-anything

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