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   由于web中的文件不能直接通过url方式读取opencms的sites下的文件,所以必须绕个弯子解决。查阅了一下opencms的源代码,我的解决思路如下:
 
第一 拷贝方式:
 
   1.第一次访问时,根据opencms提供的接口,把文件从数据库读到java对象obj
   2.将obj对象拷贝到web中的对应目录
   3.将web中的对应目录的URL确定,即可直接调用。
   4.第二次及其以后访问时,根据对象obj的最后修改时间属性,确定是否需要重复1-3步骤。

参考源代码:
 
<!--  $Id: test.jsp,v  1.5   2006 / 08 / 11   04 : 59 : 31  davidye Exp $ -->
 
<% @ page pageEncoding = " UTF-8 "   %>
<% @ page buffer = " none "   import = " org.opencms.util.*, org.teema.eeonline.exhibition.ExhibitionConstants,com.tblink.common.util.StringUtil,org.opencms.frontend.templateone.modules.*,javax.servlet.ServletOutputStream, org.opencms.file.*,java.util.*, java.io.*, org.opencms.frontend.templateone.* "   %>
<% @ taglib uri = " http://jakarta.apache.org/struts/tags-bean "  prefix = " bean " %>
<% @ taglib prefix = " cms "  uri = " http://www.opencms.org/taglib/cms "   %>
<% @ taglib prefix = " fmt "  uri = " http://java.sun.com/jstl/fmt "   %>
<% @ taglib prefix = " c "  uri = " http://java.sun.com/jstl/core "   %>
<% @ include file = " ../elements/common/common.jsp "   %>

<%!
private  String copyFile(CmsFile cmsFile){
    
try {
        
byte [] byteFile  =  cmsFile.getContents();
        String path 
=  StringUtil.getRealPath(StringUtil. class , " WEB-INF " ,ExhibitionConstants.EXHIBITION_FLASH_DIRECTIONARY);
        RandomAccessFile rf
= new  RandomAccessFile(path  +  ExhibitionConstants.EXHIBITION_FLASH_NAME, " rw " ); 
        rf.write(byteFile); 
        rf.close();
        
return  path.substring( 0 ,path.length() - 1 );
    }
    
catch (Exception e)
    {
        
return   "" ;
    }
}
%>

<%
String direct 
=  ExhibitionConstants.EXHIBITION_FLASH_DIRECTIONARY  +  ExhibitionConstants.EXHIBITION_FLASH_NAME;
String flashUrl 
=   "" ;
try {
CmsFile cmsFile 
=  __cmsJSP.getCmsObject().readFile(direct);
long  l  =  cmsFile.getDateLastModified();
String lstr 
=  (String)application.getAttribute(ExhibitionConstants.APPLICATION_FLASH_DATE_INDEX);
flashUrl 
=  (String)application.getAttribute(ExhibitionConstants.APPLICATION_FLASH_URL_INDEX);

if (lstr == null   ||   ! StringUtil.isNums(lstr)){
    direct 
=  copyFile(cmsFile);
}
else   if (Long.parseLong(lstr) == l){
    
if (flashUrl == null ){
        direct 
=  copyFile(cmsFile);
    }
}
else {
      direct 
=  copyFile(cmsFile);
}
flashUrl 
=   request.getContextPath()  +  ExhibitionConstants.EXHIBITION_FLASH_DIRECTIONARY  +  ExhibitionConstants.EXHIBITION_FLASH_NAME;
application.setAttribute(ExhibitionConstants.APPLICATION_FLASH_DATE_INDEX,lstr);
application.setAttribute(ExhibitionConstants.APPLICATION_FLASH_URL_INDEX,flashUrl);

}
catch (Exception e)
{
    out.println(e); 
}
%>

< object classid = " clsid:D27CDB6E-AE6D-11cf-96B8-444553540000 "  codebase = " http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0 "  width = " 760 "  height = " 266 " >
       
< param name = " movie "  value = " <%=flashUrl%> " >
       
< param name = " quality "  value = " high " >
       
< embed src = " <%=flashUrl%> "  quality = " high "  pluginspage = " http://www.macromedia.com/go/getflashplayer "  type = " application/x-shockwave-flash "  width = " 760 "  height = " 266 " ></ embed >
</ object >



第二、新增Resource Type方式

  1.新建Resource Type,详细请见前一篇文章
  2.在opencms控制台,新增该类别的文件
  3.调用相关API显示出来,代码如下

 
<%
    
if (getResourceCount(__cms, "TEEMA_Ad/Home/Wide_Block_1/|teemaAd"false> 0) { 
%>  

            
<cms:contentload collector="allInFolderDateReleasedDesc" param="TEEMA_Ad/Home/Wide_Block_1/|teemaAd" editable="true">
                    
<% 
                 
if(bannerTextCount<1) {
                bannerTextCount
++;
            
%>

                            
<a href='<cms:contentshow element="URL"/>' target="_blank">
                              
<img src="/eeonline/cms<cms:contentshow element="Image/Image"/>" width="440" height="75">
                            
</a>

            
<%   } %>
                  
</cms:contentload>
        
</tr>
<%
    } 
%>  

 

欢迎提出新的意见!
posted on 2006-08-11 12:59 鱼上游 阅读(3460) 评论(1)  编辑  收藏 所属分类: 爪哇世界探险


FeedBack:
# re: 关于opencms把sites目录中的文件根据URL显示到网页的解决方法
2006-09-01 12:44 | 孟厚
不错,opencms文章太少,多一篇都是好的  回复  更多评论
  

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