Java学习(尚硅谷)IO学习之File类的使用

package java3;

import org.junit.Test;

import java.io.File;
import java.io.IOException;
import java.util.Date;


public class FileTest {
    
    @Test
    public void test1() {
        //构造器1
        File file1 = new File("hello.txt");//相对于当前module
        File file2 = new File("D:\IdeaWorkSpace\JavaSenior\day08\hell.txt");

        System.out.println(file1);
        System.out.println(file2);

        //构造器2
        File file3 = new File("D:\IdeaWorkSpace","JavaSenior");
        System.out.println(file3);

        //构造器3
        File file4 = new File(file3,"hi.txt");
        System.out.println(file4);


    }

    
    @Test
    public void test2(){
        File file1 = new File("hello.txt");
        File file2 = new File("d:\ioTest\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(new Date(file1.lastModified()));

        System.out.println();

        System.out.println(file2.getAbsolutePath());
        System.out.println(file2.getPath());
        System.out.println(file2.getName());
        System.out.println(file2.getParent());
        System.out.println(file2.length());
        System.out.println(file2.lastModified());
    }
    @Test
    public void test3(){
        File file = new File("D:\ioTest");
        String[] list = file.list();
        for (String s:list){
            System.out.println(s);
        }
        System.out.println();

        File[] files = file.listFiles();
        for (File f:files){
            System.out.println(f);
        }

    }

    
    @Test
    public void test4(){
        File file1 = new File("hello.txt");
        File file2 = new File("D:\ioTest\hi.txt");
        boolean renameTo = file1.renameTo(file2);//执行以后原来的hello.txt删除，在指定的路径下生成新的hi.txt
        System.out.println(renameTo);

    }
    
    @Test
    public void test5(){
        File file1= new File("hello.txt");
        System.out.println(file1.isDirectory());
        System.out.println(file1.isFile());
        System.out.println(file1.exists());
        System.out.println(file1.canRead());
        System.out.println(file1.canWrite());
        System.out.println(file1.isHidden());

        System.out.println();

        File file2 = new File("d:\ioTest");
        System.out.println(file2.isDirectory());
        System.out.println(file2.isFile());
        System.out.println(file2.exists());
        System.out.println(file2.canRead());
        System.out.println(file2.canWrite());
        System.out.println(file2.isHidden());


    }

    
    @Test
    public void test6() throws IOException {
        //文件的创建
        File file1 = new File("hi.txt");
        if (!file1.exists()){
            file1.createNewFile();
            System.out.println("创建成功！");
        }else{
            file1.delete();
            System.out.println("删除成功！");
        }


    }
    @Test
    public void test7(){
        //文件目录的创建
        File file1 = new File("d:\ioTest\io1\io11");
        boolean mkdir1 = file1.mkdir();
        if (mkdir1){
            System.out.println("创建成功1！");
        }

        File file2 = new File("d:\ioTest\io1\io12");
        boolean mkdir2 = file2.mkdirs();
        if (mkdir2){
            System.out.println("创建成功2！");
        }
    }

}