关于opencms把sites目录中的文件根据URL显示到网页的解决方法

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：

<% @ 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！

关于opencms把sites目录中的文件根据URL显示到网页的解决方法

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