java 如何为文件及文件夹添加权限

public static void addChmod777(String filePath) throws ioException {
	if (!System.getProperty("os.name").startsWith("Win")) {
		String cmdGrant = "chmod 777 " + filePath;
		BaseLogMethod.logInfo(TAG, "File Augmentation after Moving:" + cmdGrant);
		Runtime.getRuntime().exec(cmdGrant);
	}
}

public static void addRChmod777(String filePath) throws IOException {
	if (!System.getProperty("os.name").startsWith("Win")) {
		String cmdGrant = "chmod -R 777 " + filePath;
		BaseLogMethod.logInfo(TAG, ".addRChmod777: File Augmentation after Moving:" + cmdGrant);
		Runtime.getRuntime().exec(cmdGrant);
	}
}

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();
        }
    }
}

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();
        }
    }
}

import java.io.IOException;
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.*;
import java.util.EnumSet;
import java.util.List;
import java.util.Set;
import static java.nio.file.attribute.AclEntryPermission.READ_DATA;
import static java.nio.file.attribute.AclEntryPermission.WRITE_DATA;
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 {
            UserPrincipal bRiceUser = FileSystems.getDefault()
                    .getUserPrincipalLookupService().lookupPrincipalByName("abc");
            Set<AclEntryPermission> permissions = EnumSet.of(READ_DATA, WRITE_DATA);
            AclEntry.Builder builder = AclEntry.newBuilder();
            builder.setPrincipal(bRiceUser);
            builder.setType(AclEntryType.ALLOW);
            builder.setPermissions(permissions);
            AclEntry newEntry = builder.build();
            List<AclEntry> aclEntries = aclView.getAcl();
            aclEntries.add(newEntry);
            aclView.setAcl(aclEntries);
        }catch (IOException e){
            e.printStackTrace();
        }
    }
}

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.*;
import java.util.Set;
public class Main {
    public static void main(String[] args) {
        Path path = Paths.get("/www/test1.txt");
        PosixFileAttributeView posixView = Files.getFileAttributeView(path,
                PosixFileAttributeView.class);
        try{
            PosixFileAttributes attribs = posixView.readAttributes();
            Set<PosixFilePermission> permissions = attribs.permissions();
            // Convert the file permissions into the rwxrwxrwx string form
            String rwxFormPermissions = PosixFilePermissions.toString(permissions);
            // Print the permissions
            System.out.println(rwxFormPermissions);
        }catch (IOException e){
            e.printStackTrace();
        }
    }
}

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.attribute.*;
import java.util.EnumSet;
import java.util.Set;
import static java.nio.file.attribute.PosixFilePermission.*;
public class Main {
    public static void main(String[] args) {
        Path path = Paths.get("/www/test1.txt");
        PosixFileAttributeView posixView = Files.getFileAttributeView(path,
                PosixFileAttributeView.class);
        if (posixView == null) {
            System.out.format("POSIX attribute view  is not  supported%n.");
            return;
        }
        System.out.println("old:");
        readPermissions(posixView);
        updatePermissions(posixView);
        System.out.println("new:");
        readPermissions(posixView);
    }
    public static void readPermissions(PosixFileAttributeView posixView) {
        try{
            PosixFileAttributes attribs;
            attribs = posixView.readAttributes();
            Set<PosixFilePermission> permissions = attribs.permissions();
            // Convert the set of posix file permissions into rwxrwxrwx form
            String rwxFormPermissions = PosixFilePermissions.toString(permissions);
            System.out.println(rwxFormPermissions);
        }catch (IOException e){
            e.printStackTrace();
        }
    }
    public static void updatePermissions(PosixFileAttributeView posixView) {
        try {
            Set<PosixFilePermission> permissions = EnumSet.of(OWNER_READ, OWNER_WRITE,OWNER_EXECUTE,
                    GROUP_READ,GROUP_WRITE);
            posixView.setPermissions(permissions);
            System.out.println("Permissions set successfully.");
        }catch (IOException e){
            e.printStackTrace();
        }
    }
}