在 Java 中在文件中间写入字节的最佳方法 [英] Best Way to Write Bytes in the Middle of a File in Java

问题描述

使用 Java 在文件中间写入字节的最佳方法是什么?

What is the best way to write bytes in the middle of a file using Java?

推荐答案

在文件中间读写就像使用 RandomAccessFile 在 Java 中.

Reading and Writing in the middle of a file is as simple as using a RandomAccessFile in Java.

RandomAccessFile，尽管它的名字，更像是一个 InputStream 和 OutputStream 而不太像一个 File.它允许您读取或查找文件中的 bytes，然后开始写入您想要停止的任何字节.

RandomAccessFile, despite its name, is more like an InputStream and OutputStream and less like a File. It allows you to read or seek through bytes in a file and then begin writing over whichever bytes you care to stop at.

一旦你发现了这个类，如果你对常规文件 i/o 有基本的了解，它就会非常容易使用.

Once you discover this class, it is very easy to use if you have a basic understanding of regular file i/o.

一个小例子:

public static void aMethod(){
    RandomAccessFile f = new RandomAccessFile(new File("whereDidIPutTHatFile"), "rw");
    long aPositionWhereIWantToGo = 99;
    f.seek(aPositionWhereIWantToGo); // this basically reads n bytes in the file
    f.write("Im in teh fil, writn bites".getBytes());
    f.close();
}

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