/**
 * 本案例演示用File類來創(chuàng)建目錄并進行文件操作
 */

import java.io.*;

public class ClsFileDemo {
    private final static String myUsage = "用法：\n" + "新建：ClsFileDemo path1 \n"
            + "新建一個目錄\n" + "刪除：ClsFileDemo -d path1 \n" + "刪除一個目錄/文件\n"
            + "重命名：ClsFileDemo -r path1 path2\n" + "path1重命名為path2\n";

    private static void myUsage() {
        System.err.println(myUsage); //顯示程序的使用方法
        System.exit(1);
    }

    private static void fileInfo(File f) { //該方法用來顯示屬性信息
        System.out.println( //顯示屬性信息
                "Absolute path: " + f.getAbsolutePath() + "\n Can read: "
                        + f.canRead() + "\n Can write: " + f.canWrite()
                        + "\n getName: " + f.getName() + "\n getParent: "
                        + f.getParent() + "\n getPath: " + f.getPath()
                        + "\n length: " + f.length() + "\n lastModified: "
                        + f.lastModified());
        if (f.isFile())
            System.out.println("it's a file");
        else if (f.isDirectory())
            System.out.println("it's a directory");
    }

    public static void main(String[] args) { //主方法
        if (args.length < 1)
            myUsage(); //無輸入參數(shù)時顯示用法信息
        if (args[0].equals("-r")) {
            if (args.length != 3)
                myUsage();
            File old = new File(args[1]), rname = new File(args[2]);
            old.renameTo(rname); //重命名
            System.out.println(old + " 重命名為：" + rname);
            fileInfo(old);
            fileInfo(rname);
            return; //退出
        }
        int count = 0;
        boolean del = false;
        if (args[0].equals("-d")) {
            count++;
            del = true;
        }
        for (; count < args.length; count++) {
            File f = new File(args[count]);
            if (f.exists()) { //存在則顯示目錄信息或刪除目錄
                System.out.println(f + " 已經存在");
                if (del) {
                    System.out.println("正在刪除..." + f);
                    f.delete();
                    System.out.println(f + "已經刪除！");
                }
            } else { //不存在則創(chuàng)建目錄
                if (!del) {
                    f.mkdirs();
                    System.out.println(f + "已經創(chuàng)建！");
                }
            }
            fileInfo(f); //調用fileInfo方法
        }
    }
}