如何从jar文件中读取文件? [英] How to read a file from a jar file?

问题描述

我在 JAR 文件中有一个文件.例如，它是 1.txt.

I have a file in a JAR file. It's 1.txt, for example.

我如何访问它?我的源代码是:

How can I access it? My source code is:

Double result=0.0;
File file = new File("1.txt")); //how get this file from a jar file
BufferedReader input = new BufferedReader(new FileReader(file));
String line;
while ((line = input.readLine()) != null) {
  if(me==Integer.parseInt(line.split(":")[0])){
    result= parseDouble(line.split(":")[1]);
  }
}
input.close();
return result;

推荐答案

你不能使用 File，因为这个文件在文件系统中不是独立存在的.相反，您需要 getResourceAsStream()，如下所示:

You can't use File, since this file does not exist independently on the file system. Instead you need getResourceAsStream(), like so:

...
InputStream in = getClass().getResourceAsStream("/1.txt");
BufferedReader input = new BufferedReader(new InputStreamReader(in));
...

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