Java使用特定所有者（用户/组）创建文件和目录 [英] Java Creating files and directories with a certain owner (user/group)

问题描述

在Java中可以用不同的用户/组来管理创建文件/目录（如果程序运行为ROOT）吗？ 解决方案

您可以实现JDK 7（Java NIO）

使用setOwner（）方法....

 public static Path setOwner（Path path，
 UserPrincipal owner）
 throws IOException 
  

用法示例：假设我们想让joe成为文件的所有者：

  Path path = ... 
 UserPrincipalLookupService lookupService = 
 provider（path）.getUserPrincipalLookupService（）; 
 UserPrincipal joe = lookupService.lookupPrincipalByName（joe）; 
 Files.setOwner（path，joe）; 
  

从以下URL获取更多相关信息

http://docs.oracle.com/javase/tutorial/essential /o/file.html

示例：设置所有者

  import java.nio.file.FileSystems; 
 import java.nio.file.Files; 
 import java.nio.file.Path; 
 import java.nio.file.Paths; 
 import java.nio.file.attribute.FileOwnerAttributeView; 
 import java.nio.file.attribute.UserPrincipal; 
 import java.nio.file.attribute.UserPrincipalLookupService; 
 $ b $ public class Test {
 
 public static void main（String [] args）throws Exception {
 Path path = Paths.get（C：/ home /文档/ users.txt）; 
 FileOwnerAttributeView view = Files.getFileAttributeView（path，
 FileOwnerAttributeView.class）; 
 UserPrincipalLookupService lookupService = FileSystems.getDefault（）
 .getUserPrincipalLookupService（）; 
 UserPrincipal userPrincipal = lookupService.lookupPrincipalByName（mary）; 
 
 Files.setOwner（path，userPrincipal）; 
 System.out.println（Owner：+ view.getOwner（）。getName（））; 
 
 
 
 
 $ b 
 示例：GetOwner   
 
 
  import java.nio.file.Files; 
 import java.nio.file.Path; 
 import java.nio.file.Paths; 
 import java.nio.file.attribute.FileOwnerAttributeView; 
 import java.nio.file.attribute.UserPrincipal; 
 $ b $ public class Test {
 public static void main（String [] args）throws Exception {
 Path path = Paths.get（C：/ home / docs / users。文本）; 
 FileOwnerAttributeView view = Files.getFileAttributeView（path，
 FileOwnerAttributeView.class）; 
 UserPrincipal userPrincipal = view.getOwner（）; 
 System.out.println（userPrincipal.getName（））; 
} 
} 
  
 
Is possible in Java to manage creating files / directories (if program runs as ROOT) with different user/group ?
解决方案
You can achieve JDK 7 (Java NIO)

Use setOwner() method....
public static Path setOwner(Path path,
                            UserPrincipal owner)
                     throws IOException
Usage Example:  Suppose we want to make "joe" the owner of a file:
 Path path = ...
 UserPrincipalLookupService lookupService =
     provider(path).getUserPrincipalLookupService();
 UserPrincipal joe = lookupService.lookupPrincipalByName("joe");
 Files.setOwner(path, joe);
Get more information about same from below url

http://docs.oracle.com/javase/tutorial/essential/io/file.html

Example : Set Owner
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.FileOwnerAttributeView;
import java.nio.file.attribute.UserPrincipal;
import java.nio.file.attribute.UserPrincipalLookupService;

public class Test {

  public static void main(String[] args) throws Exception {
    Path path = Paths.get("C:/home/docs/users.txt");
    FileOwnerAttributeView view = Files.getFileAttributeView(path,
        FileOwnerAttributeView.class);
    UserPrincipalLookupService lookupService = FileSystems.getDefault()
        .getUserPrincipalLookupService();
    UserPrincipal userPrincipal = lookupService.lookupPrincipalByName("mary");

    Files.setOwner(path, userPrincipal);
    System.out.println("Owner: " + view.getOwner().getName());

  }
}
Example : GetOwner
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.FileOwnerAttributeView;
import java.nio.file.attribute.UserPrincipal;

public class Test {
  public static void main(String[] args) throws Exception {
    Path path = Paths.get("C:/home/docs/users.txt");
    FileOwnerAttributeView view = Files.getFileAttributeView(path,
        FileOwnerAttributeView.class);
    UserPrincipal userPrincipal = view.getOwner();
    System.out.println(userPrincipal.getName());
  }
}


                        
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