实战演练：使用Java实现一个简单的文件操作系统

原创缺乏、安全感 2024-12-12 05:42 13阅读 0赞

创建一个简单的文件操作系统（File Operating System, FOS）在Java中可以分解为几个核心部分，包括文件的创建、读取、写入，以及目录管理。下面是一个简单示例：

```java
import java.io.*;
import java.nio.file.*;

public class SimpleFOS {
    private File root;

public SimpleFOS(String rootPath) {
        try {
            // 创建根目录
            this.root = new File(rootPath);
            if (!this.root.mkdir()) {
                throw new Exception("Failed to create root directory.");
            }
        } catch (Exception e) {
            System.out.println("Error: " + e.getMessage());
        }
    }

// 文件创建
    public void createFile(String filePath) {
        try {
            File file = new File(filePath);
            if (!file.createNewFile()) {
                throw new Exception("Failed to create file.");
            }
            System.out.println("File created successfully at: " + filePath);
        } catch (Exception e) {
            System.out.println("Error: " + e.getMessage());
        }
    }

// 文件读取
    public void readFile(String filePath) {
        try {
            File file = new File(filePath);
            if (!file.exists()) {
                throw new Exception("File does not exist.");
            }
            FileInputStream fis = new FileInputStream(file);
            BufferedReader br = new BufferedReader(fis);
            String content;
            while ((content = br.readLine()) != null) {
                System.out.println(content);
            }
            br.close();
            fis.close();
            System.out.println("Read file successfully at: " + filePath);
        } catch (Exception e) {
            System.out.println("Error: " + e.getMessage());
        }
    }

// 文件写入
    public void writeFile(String filePath, String content) {
        try {
            File file = new File(filePath);
            if (!file.exists()) {
                throw new Exception("File does not exist.");
            }
            FileOutputStream fos = new FileOutputStream(file);
            BufferedWriter bw = new BufferedWriter(fos);
            bw.write(content);
            bw.close();
            fos.close();
            System.out.println("Write file successfully at: " + filePath);
        } catch (Exception e) {
            System.out.println("Error: " + e.getMessage());
        }
    }

// 目录管理
    public void manageDirectory(String directoryPath) {
        try {
            File dir = new File(directoryPath);
            if (!dir.exists()) {
                dir.mkdir();
                System.out.println("Created directory successfully at: " + directoryPath);
            } else if (!dir.isDirectory()) {
                throw new Exception("Given path is not a directory.");
            }
        } catch (Exception e) {
            System.out.println("Error: " + e.getMessage());
        }
    }
}
```

这个示例创建了一个简单的文件操作系统，包括文件的创建、读取和写入，以及目录管理。你可以根据需要扩展功能。