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您好我正在尝试使用 Netbeans 中的 Primeface Basic Upload 工具（http://www.primefaces.org/showcase/ui/fileUploadSimple.jsf）。我的目标是在我的 Oracle 数据库中上传图像。目前加载了按钮等界面。但是，当我按下提交按钮时，它似乎没有到达我的代码。不幸的是，我没有收到任何错误消息，它似乎只到达我​​的 XHTML 页面。如何访问托管 bean 中的代码？

这是我的 XHTML 页面

<html xmlns="http://www.w3.org/1999/xhtml" 
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:p="http://primefaces.org/ui">              

  <body>

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

      <p:messages showDetail="true" />
      <p:fileUpload value="#{FileUploadController.file}" mode="simple" />
      <p:commandButton value="Submit" ajax="false" actionListener="#{FileUploadController.handleFileUpload}" />

      <h:graphicImage id="image" alt="uploaded image" url="/image"/>

    </h:form>                 
  </body>
</html>

这是托管 bean（注意：它没有到达我的日志）

public class FileUploadController
{
  private UploadedFile file; 
  private static final transient Log log = Log.getLog(null);

  public void handleFileUpload() throws IOException
  {

    log.info("Checking if code is reaching breakpoint"); 
    try
    {
      String amId = file.getFileName();
      byte[] bytes = file.getContents();

      ArticleManager aMan = new ArticleManager();
      aMan.updateImageForArticle(amId, bytes);

      FacesMessage msg = new FacesMessage(FacesMessage.SEVERITY_INFO, "Upload success", file.getFileName() + " is uploaded.");  
      FacesContext.getCurrentInstance().addMessage(null, msg);
    }
    catch(Exception e)
    {
      FacesMessage errorMsg = new FacesMessage(FacesMessage.SEVERITY_ERROR, "Upload error", e.getMessage());  
      FacesContext.getCurrentInstance().addMessage(null, errorMsg);
    }
  }

  public UploadedFile getFile()
  {
    return file; 
  }

  public void setFile(UploadedFile file)
  {
    this.file = file; 
  }
  }

ArticleManager部分（连接到 Oracle 数据库并插入右列）。

 public void updateImageForArticle(String amId, byte[] image) throws DatabaseObjectException
  {
    StringBuffer sb = new StringBuffer();
    // Insert into my columns in database (img_data is a BLOB file type)
    sb.append("insert into image(img_id, img_data) values (?, ?)"); 
    ILCDatabaseConnection conn = null;
    try
    {
      //connect to the database (pretty sure this works)
      conn = pool.getConnection();
      // create the statement object 
      PreparedStatement stmt = conn.prepareStatement(sb.toString());

      stmt.setString(1, amId);
      stmt.setBytes(2, image);
      stmt.executeUpdate();
      conn.commit();
    }
    catch (Exception ex)
    {
      ex.printStackTrace();
    }
    finally
    {
      if (conn != null)
        conn.close();
    }
  }

我的web.xml

<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">

  <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>*.xhtml</url-pattern>
  </servlet-mapping>
  <session-config>
    <session-timeout>
            30
    </session-timeout>
  </session-config>

  <filter>
    <filter-name>Pretty Filter</filter-name>
    <filter-class>com.ocpsoft.pretty.PrettyFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>Pretty Filter</filter-name>
    <url-pattern>/*</url-pattern>
    <dispatcher>FORWARD</dispatcher>
    <dispatcher>REQUEST</dispatcher>
    <dispatcher>ERROR</dispatcher>
  </filter-mapping>

  <welcome-file-list>
    <welcome-file>loadFileBrowseDialog.xhtml</welcome-file>
  </welcome-file-list> 

    <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:/tmp</param-value>
        </init-param>
    </filter>
    <filter-mapping>
        <filter-name>PrimeFaces FileUpload Filter</filter-name>
        <servlet-name>Faces Servlet</servlet-name>
    </filter-mapping> 

</web-app>

希望我没有犯任何严重的错误，不过这是我第一次使用 primefaces。

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