Java java.nio.file.FileSystems用法及代码示例

// Java Program to illustrate FileSystems Class by 
// creating a new file system using getDefault() method and 
// printing its file stores and root directories 
  
// Importing classes from java.nio package 
// for network linking 
import java.nio.file.FileStore; 
import java.nio.file.FileSystem; 
import java.nio.file.FileSystems; 
import java.nio.file.Path; 
  
// Main class 
public class GFG { 
  
    // Main driver method 
    public static void main(String[] args) 
    { 
        // Try block to check for exceptions 
        try { 
  
            // Create a new file system by 
            // creating object of FileSystem class 
            // using getDefault() method 
            FileSystem filesystem 
                = FileSystems.getDefault(); 
  
            // Display commands only 
            System.out.println( 
                "File System created successfully"); 
  
            System.out.println( 
                "Underlying file stores of this FileSystem :"); 
  
            // Printing the underlying file stores of this 
            // FileSystem using for each loop 
            for (FileStore store : 
                 filesystem.getFileStores()) { 
  
                // Print statement 
                System.out.println(store.toString()); 
            } 
  
            // Display message only 
            System.out.println( 
                "Root directories of this FileSystem :"); 
  
            // Printing the root directories of this 
            // FileSystem using for each loop 
            for (Path rootdir : 
                 filesystem.getRootDirectories()) { 
  
                // Print statement 
                System.out.println(rootdir.toString()); 
            } 
        } 
  
        // Catch block to handle the exceptions 
        catch (Exception e) { 
  
            // Print the exception along with line number 
            // using printStackTrace() method 
            e.printStackTrace(); 
        } 
    } 
}

// Java Program to illustrate FileSystems Class by 
// creating new file system using newFileSystem() method 
  
// Importing URI class from java.net package 
import java.net.URI; 
// Importing required file classes from java.nio package 
import java.nio.file.FileSystem; 
import java.nio.file.FileSystems; 
import java.nio.file.Path; 
import java.nio.file.Paths; 
// Importing Map and HashMap classes from java.util package 
import java.util.HashMap; 
import java.util.Map; 
  
// Main class 
public class GFG { 
  
    // Main driver method 
    public static void main(String[] args) 
    { 
  
        // Try block to check for exceptions 
        try { 
  
            // Creating object of Map class 
            // Declaring object of string types 
            Map<String, String> env = new HashMap<>(); 
  
            // Getting path of zip file 
            Path zipPath = Paths.get("ZipFile.zip"); 
  
            // Creating URI from zip path received 
            URI Uri 
                = new URI("jar:file", 
                          zipPath.toUri().getPath(), null); 
  
            // Create new file system from uri 
            FileSystem filesystem 
                = FileSystems.newFileSystem(Uri, env); 
  
            // Display message for better readability 
            System.out.println( 
                "FileSystem created successfully"); 
  
            // Checking if file system is open or not 
            // using isOpen() method 
            if (filesystem.isOpen()) 
  
                // Print statement 
                System.out.println("File system is open"); 
            else
  
                // Print statement 
                System.out.println("File system is close"); 
        } 
  
        // Catch block to handle the exceptions 
        catch (Exception e) { 
  
            // Print the exception with line number 
            // using the printStack() method 
            e.printStackTrace(); 
        } 
    } 
}