如何在与所加载的类无关的Jar中加载文件

Question

I am trying to load a file that is within a jar file. I try to get the file to load in a BufferedReader. For example:

BufferedReader br = new BufferedReader(new FileReader(fileName));

where fileName is my string from the root of the Jar file: something like this "resources/text.txt"

I am having a hard time finding out how to make this happen. Obviously FileReader will not work since it reads from the file system.

Anyone that can help me out?

Answer 1

Use the classloader to get the resource as a stream .

BufferedReader br = new BufferedReader(new InputStreamReader(MyClass.class.getClassLoader().getResourceAsStream("/resources/text.txt"), "utf-8");

Note that you need to specific the correct character encoding for the content.

Answer 2

如果尝试访问与正在运行的程序相同的jar中的文件，则应使用

final InputStream inputStream = ClassName.class.getResourceAsStream(fileName);