Question

我正在尝试将一些图像存储在Glassfish 4备用doc根目录中。我们的想法是允许管理员使用Prime Faces图像切换保存将在索引页面上显示的图像。这基本上是一个自动幻灯片。我尝试使用备用文档根目录，因为任何上传的图片可能无法在使用Glassfich重新部署的应用程序中存活

我的glassfish-web.xml是：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glassfish-web-app PUBLIC "-//GlassFish.org//DTD GlassFish Application Server 3.1 Servlet 3.0//EN" "http://glassfish.org/dtds/glassfish-web-app_3_0-1.dtd">
<glassfish-web-app error-url="">
  <context-root>realtyfreedom</context-root>
    <property description="Static Images" name="alternatedocroot_1" value="from=/static/images/* dir=/private/var/realtyfreedom" /> 

  <class-loader delegate="true"/>
  <jsp-config>
    <property name="keepgenerated" value="true">
      <description>Keep a copy of the generated servlet class' java code.</description>
    </property>
  </jsp-config>
</glassfish-web-app>

我的命名bean看起来像这样：

package net.realtyfreedom.beans;

import java.io.Serializable;
import java.util.Arrays;
import javax.enterprise.context.SessionScoped;
import javax.faces.context.*;
import javax.inject.Named;
import net.realtyfreedom.utils.SlideRetriever;
//import org.apache.log4j.*;
import java.util.logging.Logger;

@Named
@SessionScoped
public class SlideList implements Serializable
{

   private final String[] images = new String[100];
   private final String facesContext = FacesContext.getCurrentInstance().getExternalContext().getRequestContextPath();
   //private final String imagePath = facesContext + "/images/";
   private final String imagePath = "/realtyfreedom/static/images/index.xhtml";
   private final Logger logger = Logger.getLogger(this.getClass().getName());


   public String getFacesContext()
   {

      logger.info("log4j: Faces Context is: " + facesContext);
      return imagePath;
   }

   public String[] getImages() {
      SlideRetriever sr = new SlideRetriever();
      return sr.getImages();
   }
   public String getImageNames() {
      SlideRetriever sr = new SlideRetriever();
      sr.init(imagePath);
      logger.info("App log array: sr: sr list" + Arrays.toString(sr.getImages()));
      String[] imageList =  sr.getImages();

      //logger.("info: image files: " + imageList.length + " " + Arrays.toString(imageList));
      return Arrays.toString(imageList);
   }
}

这是检索文件数组的实用程序类

package net.realtyfreedom.utils;

import java.io.File;
import java.io.Serializable;
import java.util.Arrays;
import javax.faces.context.FacesContext;
import java.util.logging.Logger;

public class SlideRetriever implements Serializable
{

   private String[] images = new String[100];
   private final String facesContext = FacesContext.getCurrentInstance().getExternalContext().getRealPath("/resources/images/slideshow");
   //private final String imagePath = facesContext + "/resources/images/slideshow";
   private String imagePath = "";
   private final Logger logger = Logger.getLogger(this.getClass().getName());

   public SlideRetriever()
   {

   }

   public void init(String ip)
   {
      imagePath = ip;
      try
      {
         File folder = new File(imagePath);
         logger.info("App: Folder path is: " + imagePath);
         logger.info("App: Canonical Path : " + folder.getCanonicalPath());

         images = folder.list();

      } catch (Exception ex)
      {
         System.out.println(ex.getStackTrace());
      }
   }

   public String[] getImages()
   {
      logger.info("Debug: " + Arrays.toString(images));
      return images;
   }
}

结果是SlideRetriever类的init（）方法中的字符串数组图像返回null。但是，当我在控制台应用程序中运行此代码时，我会得到一个文件名列表。此外，我可以使用图像路径以及static / images目录中的现有文件，我可以在浏览器中显示图像。

我在Glassfish 3上看到了一个类似的问题，但我没有看到Glassfish 4的这个问题。在Glassfish 3中，我认为最终的答案是开发人员将图像写入数据库。如果可能的话，我想避免这种情况。任何帮助将不胜感激。抱歉代码的粗略状态。

Glass fish 4 alternatedocroot Prime Faces的文件列表

0 个答案: