运行jar文件时出现NoSuchFileException

Question

When I run a jar file that accesses other files in the src directory, I get the following RuntimeException :

Exception in thread "main" java.nio.file.NoSuchFileException: src\\FileToBeAccessed.txt.lck at sun.nio.fs.WindowsException.translateToIOException(Unknown Source) at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) at sun.nio.fs.WindowsException.rethrowAsIOException(Unknown Source) at sun.nio.fs.WindowsFileSystemProvider.newFileChannel(Unknown Source) at java.nio.channels.FileChannel.open(Unknown Source) at java.nio.channels.FileChannel.open(Unknown Source) at java.util.logging.FileHandler.openFiles(Unknown Source) at java.util.logging.FileHandler.(Unknown Source) at Program.main(Program.java:30)

The code works fine when I run it directly without building a jar file.

Answer 1

您需要更改将jar中的资源访问流的方式。

this.getClass().getResourceAsStream("/file.txt");

Answer 2

正确的方法是

this.getClass().getResourceAsStream("file.txt");

Answer 3

It is really strange that

this.getClass().getResource("file.txt")

does work in IDE but NOT when you run it from a jar.

this.getClass().getResourceAsStream("file.txt") 

works both inside IDE and from jar.