java - 如何关闭 Files.write

Question

我要尝试创建目录并将数据写入该文件。我正在尝试使用 java nio 来更有效地编写文件。我的疑问是在下面写完之后如何关闭它是我的代码。请给我建议。

这是创建目录和写入大型数据文件 [200 kb] 的正确方法吗。

    java.nio.file.Path path = java.nio.file.Paths.get(filePath);

    try {
        if (!java.nio.file.Files.exists(path)) {
            java.nio.file.Files.createDirectories(path.getParent());
            path = java.nio.file.Files.createFile(path);
            path = java.nio.file.Files.write(path, data.getBytes());
        } else {
            java.nio.file.Files.write(path, data.getBytes("utf-8"), 
                    java.nio.file.StandardOpenOption.CREATE, java.nio.file.StandardOpenOption.TRUNCATE_EXISTING);
        }
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
    }

Answer 1

1. 关闭文件

您不必关闭它，因为写入方法本身确保在写入最后一个字节后该文件将被关闭。

根据 Files.write() 的描述方法。

Writes bytes to a file. The options parameter specifies how the the file is created or opened. If no options are present then this method works as if the CREATE, TRUNCATE_EXISTING, and WRITE options are present. In other words, it opens the file for writing, creating the file if it doesn't exist, or initially truncating an existing regular-file to a size of 0. All bytes in the byte array are written to the file. The method ensures that the file is closed when all bytes have been written (or an I/O error or other runtime exception is thrown). If an I/O error occurs then it may do so after the file has created or truncated, or after some bytes have been written to the file.

1. 创建目录和写入大数据文件的正确方法。

只要您处理所有异常情况就可以了。