Question

我正在尝试使用primefaces上传图像，并且不会调用fileUploadListener。

<h:form enctype="multipart/form-data">

        <p:fileUpload fileUploadListener="#{fileUploadController.handleFileUpload}"
        mode="advanced" 
        update="messages"
        sizeLimit="100000" 
        allowTypes="/(\.|\/)(gif|jpe?g|png)$/"/>

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

这是bean：

@ManagedBean
@RequestScoped
public class FileUploadController {
    public void handleFileUpload(FileUploadEvent event) throws Exception {
      System.out.println("OOOOOOOOOOOOOOOOOOK");
            File targetFolder = new File("C:/Uploads");
            InputStream inputStream = event.getFile().getInputstream();
            OutputStream out = new FileOutputStream(new File(targetFolder,
                    event.getFile().getFileName()));
            int read = 0;
            byte[] bytes = new byte[1024];

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

    }
}

这是web.xml配置：

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" 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_3_0.xsd">
<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>
<dispatcher>FORWARD</dispatcher>
</filter-mapping>
  <context-param>
        <param-name>javax.faces.PROJECT_STAGE</param-name>
        <param-value>Development</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>

我还在类路径中添加了commons-fileupload和Commons-io jar。我不明白为什么不调用handleFileUpload。

Answer 1

您已明确将文件上传过滤器配置为仅侦听FORWARD调度程序。

您需要从过滤器映射中删除以下条目，以便它默认仅在REQUEST调度程序上进行侦听：

<dispatcher>FORWARD</dispatcher>

或者，将<{em}}调度程序添加到过滤器映射中，以便它也可以在正常请求上运行：

REQUEST

<dispatcher>REQUEST</dispatcher> <dispatcher>FORWARD</dispatcher>调度程序仅在调用过滤器调用之前调用RequestDispatcher#forward()时才是必需的。例如，通过一些URL重写解决方案，如PrettyFaces。然而，到目前为止在问题中提供的信息似乎并未以任何方式表明您正在使用该信息。

无关具体问题，因为PrimeFaces文件上传需要Apache Commons IO，您可能需要考虑FORWARD而不是那个详细的输入/输出流循环。另见：How to save uploaded file in JSF。

p：fileUpload中的监听器方法永远不会在primefaces中调用

1 个答案: