这篇文章主要介绍了如何使用java修改文件所有者及其权限,文中通过示例代码介绍的非常详细，对大家的学习或者工作具有一定的参考学习价值,需要的朋友可以参考下

1.设置所有者

管理文件所有者

Files.getOwner()和Files.setOwner()方法

要使用UserPrincipal来管理文件的所有者

（1）更改文件的所有者

import java.io.IOException;
import java.nio.file.*;
import java.nio.file.attribute.FileOwnerAttributeView;
import java.nio.file.attribute.UserPrincipal;
import java.nio.file.attribute.UserPrincipalLookupService;

public class Main {
  public static void main(String[] args) {

    Path path = Paths.get("/www/test1.txt");

    FileOwnerAttributeView foav = Files.getFileAttributeView(path,
        FileOwnerAttributeView.class);
    try {
      UserPrincipal owner = foav.getOwner();
      System.out.format("Original owner of %s is %s%n", path,
          owner.getName());

      FileSystem fs = FileSystems.getDefault();
      UserPrincipalLookupService upls = fs.getUserPrincipalLookupService();

      UserPrincipal newOwner = upls.lookupPrincipalByName("abc");
      foav.setOwner(newOwner);

      UserPrincipal changedOwner = foav.getOwner();
      System.out.format("New owner of %s is %s%n", path,
          changedOwner.getName());

    }catch (IOException e){
      e.printStackTrace();
    }

  }
}

输出

查看文件详细信息

2.ACL文件权限

Windows上支持ACL类型文件属性

使用AclFileAttributeView的

　　getAcl()方法获取文件的AclEntry列表

　　setAcl()方法设置文件的AclEntry列表

（1）读取文件e:/test1.txt的ACL条目

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.AclEntry;
import java.nio.file.attribute.AclEntryPermission;
import java.nio.file.attribute.AclFileAttributeView;
import java.util.List;
import java.util.Set;

public class Main {
  public static void main(String[] args) {
    
    Path path = Paths.get("e:/test1.txt");
    AclFileAttributeView aclView = Files.getFileAttributeView(path,
        AclFileAttributeView.class);
    if (aclView == null) {
      System.out.format("ACL view is not supported.%n");
      return;
    }
    try {
      List<AclEntry> aclEntries = aclView.getAcl();
      for (AclEntry entry : aclEntries) {
        System.out.format("Principal: %s%n", entry.principal());
        System.out.format("Type: %s%n", entry.type());
        System.out.format("Permissions are:%n");

        Set<AclEntryPermission> permissions = entry.permissions();
        for (AclEntryPermission p : permissions) {
          System.out.format("%s %n", p);
        }

      }
    } catch (IOException e) {
      e.printStackTrace();
    }

  }
}

输出结果为

Principal: BUILTIN\Administrators (Alias)
Type: ALLOW
Permissions are:
WRITE_DATA 
WRITE_OWNER 
APPEND_DATA 
SYNCHRONIZE 
WRITE_ATTRIBUTES 
EXECUTE 
READ_DATA 
DELETE_CHILD 
READ_ATTRIBUTES 
WRITE_NAMED_ATTRS 
WRITE_ACL 
DELETE 
READ_ACL 
READ_NAMED_ATTRS 
Principal: NT AUTHORITY\SYSTEM (Well-known group)
Type: ALLOW
Permissions are:
WRITE_DATA 
WRITE_OWNER 
APPEND_DATA 
SYNCHRONIZE 
WRITE_ATTRIBUTES 
EXECUTE 
READ_DATA 
DELETE_CHILD 
READ_ATTRIBUTES 
WRITE_NAMED_ATTRS 
WRITE_ACL 
DELETE 
READ_ACL 
READ_NAMED_ATTRS 
Principal: NT AUTHORITY\Authenticated Users (Well-known group)
Type: ALLOW
Permissions are:
WRITE_DATA 
READ_ATTRIBUTES 
APPEND_DATA 
WRITE_NAMED_ATTRS 
SYNCHRONIZE 
WRITE_ATTRIBUTES 
EXECUTE 
DELETE 
READ_DATA 
READ_ACL 
READ_NAMED_ATTRS 
Principal: BUILTIN\Users (Alias)
Type: ALLOW
Permissions are:
READ_ATTRIBUTES 
SYNCHRONIZE 
EXECUTE 
READ_DATA 
READ_ACL 
READ_NAMED_ATTRS