使用FileRead,BufferedReader,FileWriter,BufferedWriter的文件读写功能改写查看，创建和删除文件或目录

好的，我会尝试回答你的问题。以下是使用Java中的File、FileReader、BufferedReader、FileWriter和BufferedWriter类来实现文件读写和文件/目录的创建、查看和删除的示例代码：

1. 查看文件/目录

import java.io.File;

public class FileViewer {
    public static void main(String[] args) {
        String path = "C:\\Users\\User\\Documents";
        File file = new File(path);
        if (file.exists()) {
            if (file.isDirectory()) {
                System.out.println("目录 " + path + " 包含以下文件/目录:");
                String[] files = file.list();
                for (String f : files) {
                    System.out.println(f);
                }
            } else {
                System.out.println("文件 " + path + " 存在.");
            }
        } else {
            System.out.println("文件/目录 " + path + " 不存在.");
        }
    }
}

2. 创建目录

import java.io.File;

public class DirectoryCreator {
    public static void main(String[] args) {
        String path = "C:\\Users\\User\\Documents\\test";
        File dir = new File(path);
        if (dir.mkdir()) {
            System.out.println("目录 " + path + " 创建成功.");
        } else {
            System.out.println("目录 " + path + " 创建失败.");
        }
    }
}

3. 创建文件并写入内容

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class FileWriterDemo {
    public static void main(String[] args) {
        String fileName = "C:\\Users\\User\\Documents\\test\\test.txt";
        String content = "Hello, world!";
        File file = new File(fileName);
        try (BufferedWriter writer = new BufferedWriter(new FileWriter(file))) {
            writer.write(content);
            System.out.println("文件 " + fileName + " 写入成功.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

4. 读取文件内容

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;

public class FileReaderDemo {
    public static void main(String[] args) {
        String fileName = "C:\\Users\\User\\Documents\\test\\test.txt";
        File file = new File(fileName);
        try (BufferedReader reader = new BufferedReader(new FileReader(file))) {
            String line = null;
            while ((line = reader.readLine()) != null) {
                System.out.println(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

5. 删除文件/目录

import java.io.File;

public class FileDeleter {
    public static void main(String[] args) {
        String path = "C:\\Users\\User\\Documents\\test\\test.txt";
        File file = new File(path);
        if (file.delete()) {
            System.out.println("文件 " + path + " 删除成功.");
        } else {
            System.out.println("文件 " + path + " 删除失败.");
        }

        path = "C:\\Users\\User\\Documents\\test";
        file = new File(path);
        if (file.delete()) {
            System.out.println("目录 " + path + " 删除成功.");
        } else {
            System.out.println("目录 " + path + " 删除失败.");
        }
    }
}

希望以上示例代码能够帮助你解决问题。