java將文件夾中的多個文件（包含子文件夾）壓縮成zip文件

package myPackage;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipOutputStream;

public class ZipUtil {
	
	public void zip(String inputFileName) throws Exception {
		String directory = System.getProperty("user.dir");
        String zipFileName = directory + "\\staff_select.zip"; //打包後文件名字
        System.out.println(zipFileName);
        zip(zipFileName, new File(inputFileName));
    }

    private void zip(String zipFileName, File inputFile) throws Exception {
        ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFileName));
        zip(out, inputFile, "");
        System.out.println("zip done");
        out.close();
    }

    private void zip(ZipOutputStream out, File f, String base) throws Exception {
        if (f.isDirectory()) {
           File[] fl = f.listFiles();
           out.putNextEntry(new ZipEntry(base + "/"));
           base = base.length() == 0 ? "" : base + "/";
           for (int i = 0; i < fl.length; i++) {
           zip(out, fl[i], base + fl[i].getName());
         }
        }else {
           out.putNextEntry(new ZipEntry(base));
           FileInputStream in = new FileInputStream(f);
           int b;
           System.out.println(base);
           while ( (b = in.read()) != -1) {
            out.write(b);
         }
         in.close();
       }
    }

    public static void main(String [] temp){
    	ZipUtil zu = new ZipUtil();
    	String directory = System.getProperty("user.dir");
    	System.out.println(directory);
        try {
           zu.zip(directory + "\\staff_select");//你要壓縮的文件夾
        }catch (Exception ex) {
           ex.printStackTrace();
       }
    }

}