如何从我的战争中访问文本文件

Question

How do I know what file reference to use to get a file from my WAR.

The structure of the WAR is:

WAR
src
- model
- web
build
WebContent
META-INF
WEB-INF
LIB

The JSPs are under WebContent, I have put the config.txt file under the WebContent folder and tried to get to it with

BufferedReader in = new BufferedReader(new FileReader("WebContent/config.txt"));

But this doesn't work. Does anyone know what reference I need to pass or how I can figure it out.

Answer 1

Check out ServletContext.getResourceAsStream() . Here is an example .

Answer 2

我想只是在读取文件时从路径中删除WebContent，它应该有所帮助。

Answer 3

One way to do this comes with a caveat that I'll explain below. You should do something like this:

// In a Servlet
ServletContext sc = getServletContext();
BufferedReader in = 
    new BufferedReader(new FileReader(sc.getRealPath("WebContent/config.txt"));

This assumes that your servlet container is configured to expand war files into their corresponding directory structure.

Answer 4

The safest way to access this file should be something like this:

InputStream input = getClass().getClassLoader().getResourceAsStream("your/path/enter/here");