Java ZipFile和ZipInputStream的區別用法及代碼示例

// Java Program to illustrate extraction of
// Zip file
// Importing classes and modules
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Scanner;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
// save as file named GFG.java
// Class
public class GFG {
    // Step 1: Specify the file name
    // with path of the zip file
    // Custom directory from local directory
    // is passed as an argument
    public static String file_path
        = "C:\\Users\\Dipak\\Desktop\\j.zip";
    // Step 2: Specify the name of the file
    // present in the zip file to be accessed
    public static String file_name = "j/ritu.txt";
    // Also do remember that one can take input
    // for the file path and name
    // Using Zipinputstream method
    public static BufferedInputStream b;
    public static ZipInputStream z;
    // Zipinputsream()  method for implementation
    public static void zipinputstream() throws IOException
    {
        z = new ZipInputStream(b);
        ZipEntry e;
        // If condition holds true
        while (true) {
            // Read the next ZIP file entry positioning
            // the stream at beginning
            e = z.getNextEntry();
            if (e == null)
                break;
            if (e.getName().equals(file_name)) {
                // Display message
                System.out.println("file size is "
                                   + e.getSize()
                                   + " bytes");
            }
        }
    }
    // Main driver method
    public static void main(String[] args) throws Exception
    {
        b = new BufferedInputStream(
            new FileInputStream(file_path));
        // calling static method
        zipinputstream();
    }
}

// Java Program to illustrate extraction of
// ZipInputStream
// Importing classes and modules
import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.Scanner;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;
// save as file named GFG.java
// CLass
public class GFG {
    // file name with path of the zip file.
    public static String file_path
        = "C:\\Users\\Dipak\\Desktop\\j.zip";
   
    // name of the file present in the zip file to be
    // accessed.
    public static String file_name = "j/gfg.txt";
   
    // we can also take input for the file path and name
    // Using ZipFile method;
    public static void zipfile() throws IOException
    {
        // creating an object of zip file class
        ZipFile f = new ZipFile(file_path);
       
        // getting all its entries
        Enumeration<? extends ZipEntry> entry = f.entries();
       
        // checking for the particular file we require and
        // printing its size
        while (entry.hasMoreElements()) {
            final ZipEntry e = entry.nextElement();
            if (e.getName().equals(file_name))
                System.out.println(
                    "size of file specified is "
                    + e.getSize() + " bytes");
        }
    }
    public static void main(String[] args) throws Exception
    {
        // calling static method
        zipfile();
    }
}