package file;

import java.io.File;

import java.io.IOException;

import org.junit.jupiter.api.Test;

/*

 * File类的使用

 * 1.File类的一个对象，代表代表一个文件或文件目录

 * 2.路径

 *       相对路径：相对于当前工作环境的路径

 *       绝对路径：存在盘符内的路径，注意\要用转义字符\\

 * 3.四种构造方式

 *

 *  如下两个方式适用于文件目录

 * public String[] list() : 得到目录下所有文件或文件目录的名称数组

 * public File[] listFiles() : 得到目录下所有文件或文件目录的File数组

 * */

public class FileTest {

    public void test1() {

        File file1 = new File("hello.txt");

        File file2 = new File("D:\\a\\1.txt");

        File file3 = new File("D:\\a","b");

        File file4 = new File(file3,"c.txt");

    }

    @Test

    public void test2() {

        File file1 = new File("hello.txt");

        File file2 = new File("d:\\io\\hi.txt");

        System.out.println(file1.getAbsolutePath());

        System.out.println(file1.getPath());

        System.out.println(file1.getName());

        System.out.println(file1.getParent());

        System.out.println(file1.length());

        System.out.println(file1.lastModified());

    }

    @Test

    public void test3() {

        File file = new File("C:\\Users\\ASUS\\Desktop\\JAVAEE\\practice\\IO_FIle");

        String [] list = file.list();

        for(String s: list)

            System.out.println(s);

        File[] listFiles = file.listFiles();

        for(File f: listFiles)

            System.out.println(f);

    }

    /*

     * file1.renameTo(file2) :把文件重命名为指定的文件路径,要求file1存在，file2不存在

     * */

    @Test

    public void test4() {

        File file1 = new File("1.txt");

        System.out.println(file1.length());

        File file2 = new File("C:\\Users\\ASUS\\Desktop\\JAVAEE\\practice\\IO_FIle\\2.txt");

        boolean renameTo = file1.renameTo(file2);

        System.out.println(renameTo);

    }

    @Test

    public void test5() {

        File file = new File("2.txt");

        System.out.println(file.isDirectory());

        System.out.println(file.isFile());

        System.out.println(file.exists());

        System.out.println(file.canRead());

        System.out.println(file.canWrite());

        System.out.println(file.isHidden());

    }

    /*

     * 文件的创建与删除

     * 注意：删除不走回收站

     * */

    @Test

    public void test6() throws IOException {

        File file = new File("3.txt");

        if(!file.exists()) {

            file.createNewFile();

            System.out.println("创建成功");

        }

        else {

            file.delete();

            System.out.println("删除成功");

        }

    }

    @Test

    public void test7() {

        File file1 = new File("io\\io1\\io2");

        boolean mkdir1 = file1.mkdir();

        if(mkdir1)

            System.out.println("创建成功1");

        File file2 = new File("io\\io1\\io2");

        boolean mkdir2 = file2.mkdirs();

        if(mkdir2)

            System.out.println("创建成功2");

    }

    @Test

    public void test8() throws IOException {

        File file1 = new File("io\\io1\\hello.txt");

        File file2 = new File("io\\io1\\haha.txt");

        if(!file1.exists()) {

            file1.createNewFile();

            System.out.println("创建成功");

        }

        if(!file2.exists()) {

            file2.createNewFile();

            System.out.println("创建成功");

        }

    }

    @Test

    public void test9() throws IOException {

        File file = new File("io\\io1\\a.jpg");

        if(!file.exists()) {

            file.createNewFile();

            System.out.println("创建成功");

        }

        File file1 = new File("io\\io1");

        String [] s = file1.list();

        for(String  ss : s) {

            if(ss.endsWith(".jpg"))

                System.out.println(ss);

        }

    }

    static void walk(File file) {

        File filelist[] = file.listFiles();

        for(File f:filelist) {

            if(f.isDirectory()) {

                walk(f);

            }

            else {

                System.out.println(f);

            }

        }

    }

    @Test

    public void test10() {

        File file = new File("io");

        walk(file);

    }

}