java使用File创建空文件和创建单级文件、多级文件、删除、获得文件夹下的文件和文件夹

1、使用createNewFile创建文件

package com.controller;

import org.springframework.web.bind.annotation.*;

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

@RestController
@CrossOrigin
@RequestMapping("/admin")
public class AdminController{
    @GetMapping("/{id}")
    public Boolean findById(@PathVariable Long id) throws InterruptedException, IOException {
        File file = new File("D:\\sz\\a.txt");
        Boolean newFile = file.createNewFile();
        return newFile;
    }
}

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2、使用mkdir创建单级文件夹

package com.controller;

import org.springframework.web.bind.annotation.*;

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

@RestController
@CrossOrigin
@RequestMapping("/admin")
public class AdminController{
    @GetMapping("/{id}")
    public Boolean findById(@PathVariable Long id) throws InterruptedException, IOException {
        File file1 = new File("D:\\sz\\dade");
        Boolean newFile2 = file1.mkdir();
        return newFile2;
    }
}

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3、使用mkdirs创建多级文件夹

package com.controller;

import org.springframework.web.bind.annotation.*;

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

@RestController
@CrossOrigin
@RequestMapping("/admin")
public class AdminController{
    @GetMapping("/{id}")
    public Boolean findById(@PathVariable Long id) throws InterruptedException, IOException {
        File file1 = new File("D:\\sz\\dade\\dad\\dad\\dad");
        Boolean newFile2 = file1.mkdirs();
        return newFile2;
    }
}

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4、使用delete删除文件和文件夹，只能一层一层删除

package com.controller;

import org.springframework.web.bind.annotation.*;

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

@RestController
@CrossOrigin
@RequestMapping("/admin")
public class AdminController{
    @GetMapping("/{id}")
    public Boolean findById(@PathVariable Long id) throws InterruptedException, IOException {
        File file1 = new File("D:\\sz\\dade");
        Boolean newFile2 = file1.delete();
        return newFile2;
    }
}

5、获得文件和文件夹

package com.controller;

import org.springframework.web.bind.annotation.*;

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

@RestController
@CrossOrigin
@RequestMapping("/admin")
public class AdminController{
    @GetMapping("/{id}")
    public Boolean findById(@PathVariable Long id) throws InterruptedException, IOException {
        File file1 = new File("D:\\sz\\dade");
        Boolean newFile2 = file1.delete();
        return newFile2;
    }

    public static void main(String[] arge){
        File file1 = new File("D:\\sz\\dade");
        File[] files = file1.listFiles();
        for(File s : files){
            System.out.print(s+"\n");
        }

    }
}

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