绝对路径的相对URL(Relative URL to Absolute Path)

 我想要做的是阅读html文件的内容。 点击一个链接，应该读取html文件内容，并在我的代码中使用该内容。 
 
 我尝试了什么： 
 
 我尝试将相对路径转换为绝对路径 
 
String absoluteFilePath = servletContext.getRealPath("/html/en/TestPage.html");
 
 这在我的Windows开发机器上的weblogic中运行良好但是当这个代码在Unix机器上部署到webloic时，上面的代码返回null。 我挖了谷歌，我找到了 
 
 
 
 “如果servlet容器由于任何原因（例如，当从.war存档中提供内容时）无法将虚拟路径转换为实际路径，则servletContext.getRealPath将返回null。” 
 
 
 能否请您建议将相对路径转换为绝对路径的最佳方法（使用上下文路径）。 代码应该在Windows以及Unix平台上工作，或者以其他方式读取html文件，而不是从绝对路径读取，如果我可以从相对路径读取文件文件。 

what I am trying to do is to read content of html file. On click of a link the html file content should be read and that content will be used somwhere in my code.
 
What I tried:
 
I tried converting relative path to absolute path
 
String absoluteFilePath = servletContext.getRealPath("/html/en/TestPage.html");
 
and this works fine in weblogic on my windows dev machine but when this code is deployed to webloic on Unix machine the above code is returning null. I dig up google and I found 
 
 
 
"servletContext.getRealPath returns null if the servlet container cannot translate the virtual path to a real path for any reason (such as when the content is being made available from a .war archive)."
 
 
Can you please suggest best way to convert the relative path to absolute(using context path). The code should work on windows as well as on Unix platform or some other way round to read the html file like instead of reading from absolute path if I can read file file from relative path.

原文：https://stackoverflow.com/questions/26273868