在 Java 中，如何将文件所有者设置为 root？

Question

I'm using MacOS and this is my sample code:

@Component
public class HealthFileSystemServiceImpl {
    public HealthCommonConf saveYml(HealthCommonConf healthCommonConf) throws IOException {
        Files.setOwner(Paths.get(myFilePath), FileSystems.getDefault().getUserPrincipalLookupService().lookupPrincipalByName("root"));
    }
}

And I get this exception message:

java.nio.file.FileSystemException: /tmp/jmuser/healthService/monitor/Test-Jmsight-id_Test-Health-Name.yml: Operation not permitted

    at java.base/sun.nio.fs.UnixException.translateToIOException(UnixException.java:100)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:111)
    at java.base/sun.nio.fs.UnixException.rethrowAsIOException(UnixException.java:116)
    at java.base/sun.nio.fs.UnixFileAttributeViews$Posix.setOwners(UnixFileAttributeViews.java:268)
    at java.base/sun.nio.fs.UnixFileAttributeViews$Posix.setOwner(UnixFileAttributeViews.java:290)
    at java.base/sun.nio.fs.FileOwnerAttributeViewImpl.setOwner(FileOwnerAttributeViewImpl.java:100)
    at java.base/java.nio.file.Files.setOwner(Files.java:2163)

How can I solve this?

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Edit

Environment :

1. I'm using IntelliJ, and I'm trying to run my JUnit test file.
2. healthTcpConfRepository.findById(1L) returns true .
3. myFilePath exists.

---

@Autowired
private HealthFileSystemServiceImpl healthFileSystemService;

@Test
public void saveConf() throws IOException {
    healthFileSystemService.saveYml(healthTcpConfRepository.findById(1L).orElse(null));
}

Answer 1

Please make sure that your IDE ie IntelliJ IDEA is running with root privileges while you execute your application.

If you're running it from a command line / terminal then it should also be executed with root .

Answer 2

Thanks for @Azeem.

When i run as root with terminal, it is passed.

root# mvn clean test -Dtest={myPackage}.HealthFileSystemServiceImplTest#saveConf