如何在Java中读取和写入文件

// 从文件中读取数据
try (Scanner scanner = new Scanner(new File("file.txt"))) {
       while (scanner.hasNext()) {
           String data = scanner.next();
           // 处理数据
       }
} catch (FileNotFoundException e) {
       e.printStackTrace();
}

// 向文件中写入数据
try (PrintWriter writer = new PrintWriter(new File("file.txt"))) {
       writer.println("Hello, World!");
       // 写入其他数据
} catch (FileNotFoundException e) {
       e.printStackTrace();
}